|
Gents, Please review the candidate hardware. If you guys are fine with the functionality, I will start laying this out. Gordon, what is a good time to call you?
- f
|
VERY IMPRESSIVE!!!!!!!!!? ?I wish I had seen that just a bit ago!!!? You have made fantastic progress!!!!!
I don't understand exactly how your pressure monitor is working.? ?Can you tell me a)? the smallest pressure change you can measure (RESOLUTION) b)? the maximum pressure you can measure with that setup????
We also need a DISCONNECT ALARM.? ?If you add that, you already?meet all the safety requirements.? Disconnect is determined when the inspired pressure fails to significantly rise, despite the fact that you are delivering a breath to the patient.? It means the patient has become disconnected from the tubing.? So instead of seeing 30 cm of H2O pressure....you suddenly?see only 2 or 3 when you deliver a breath.... make sense?
GREAT JOB!? ?You can call me ANYTIME.? ? ?I don't know exactly HOW you call me but I will try.? ?FANTASTIC WORK. gordon
On Thu, Mar 26, 2020 at 4:42 PM Ashhar Farhan < farhanbox@...> wrote: Gents, Please review the candidate hardware. If you guys are fine with the functionality, I will start laying this out. Gordon, what is a good time to call you?
- f
|
Gordon, I don't think i have your number. mine is?+91-9849026029. The sensor can go to 100mm of H2O above atmospheric pressure. - f
VERY IMPRESSIVE!!!!!!!!!? ?I wish I had seen that just a bit ago!!!? You have made fantastic progress!!!!!
I don't understand exactly how your pressure monitor is working.? ?Can you tell me a)? the smallest pressure change you can measure (RESOLUTION) b)? the maximum pressure you can measure with that setup????
We also need a DISCONNECT ALARM.? ?If you add that, you already?meet all the safety requirements.? Disconnect is determined when the inspired pressure fails to significantly rise, despite the fact that you are delivering a breath to the patient.? It means the patient has become disconnected from the tubing.? So instead of seeing 30 cm of H2O pressure....you suddenly?see only 2 or 3 when you deliver a breath.... make sense?
GREAT JOB!? ?You can call me ANYTIME.? ? ?I don't know exactly HOW you call me but I will try.? ?FANTASTIC WORK. gordon
On Thu, Mar 26, 2020 at 4:42 PM Ashhar Farhan < farhanbox@...> wrote: Gents, Please review the candidate hardware. If you guys are fine with the functionality, I will start laying this out. Gordon, what is a good time to call you?
- f
|
The resolution is about 0.5mm or even less.?
- f
On Fri, Mar 27, 2020 at 2:25 AM Ashhar Farhan < farhanbox@...> wrote: Gordon, I don't think i have your number. mine is?+91-9849026029. The sensor can go to 100mm of H2O above atmospheric pressure. - f
VERY IMPRESSIVE!!!!!!!!!? ?I wish I had seen that just a bit ago!!!? You have made fantastic progress!!!!!
I don't understand exactly how your pressure monitor is working.? ?Can you tell me a)? the smallest pressure change you can measure (RESOLUTION) b)? the maximum pressure you can measure with that setup????
We also need a DISCONNECT ALARM.? ?If you add that, you already?meet all the safety requirements.? Disconnect is determined when the inspired pressure fails to significantly rise, despite the fact that you are delivering a breath to the patient.? It means the patient has become disconnected from the tubing.? So instead of seeing 30 cm of H2O pressure....you suddenly?see only 2 or 3 when you deliver a breath.... make sense?
GREAT JOB!? ?You can call me ANYTIME.? ? ?I don't know exactly HOW you call me but I will try.? ?FANTASTIC WORK. gordon
On Thu, Mar 26, 2020 at 4:42 PM Ashhar Farhan < farhanbox@...> wrote: Gents, Please review the candidate hardware. If you guys are fine with the functionality, I will start laying this out. Gordon, what is a good time to call you?
- f
|
OK, I don't know exactly how to call that without incurring?large long distance costs.? ?is there way to use facetime?
Is that pressure ABSOLUTE (hence, it is just a little bit above atmospheric) -- which is what we think or is it GAUGE ?
On Thu, Mar 26, 2020 at 4:55 PM Ashhar Farhan < farhanbox@...> wrote: Gordon, I don't think i have your number. mine is?+91-9849026029. The sensor can go to 100mm of H2O above atmospheric pressure. - f
VERY IMPRESSIVE!!!!!!!!!? ?I wish I had seen that just a bit ago!!!? You have made fantastic progress!!!!!
I don't understand exactly how your pressure monitor is working.? ?Can you tell me a)? the smallest pressure change you can measure (RESOLUTION) b)? the maximum pressure you can measure with that setup????
We also need a DISCONNECT ALARM.? ?If you add that, you already?meet all the safety requirements.? Disconnect is determined when the inspired pressure fails to significantly rise, despite the fact that you are delivering a breath to the patient.? It means the patient has become disconnected from the tubing.? So instead of seeing 30 cm of H2O pressure....you suddenly?see only 2 or 3 when you deliver a breath.... make sense?
GREAT JOB!? ?You can call me ANYTIME.? ? ?I don't know exactly HOW you call me but I will try.? ?FANTASTIC WORK. gordon
On Thu, Mar 26, 2020 at 4:42 PM Ashhar Farhan < farhanbox@...> wrote: Gents, Please review the candidate hardware. If you guys are fine with the functionality, I will start laying this out. Gordon, what is a good time to call you?
- f
|
Ah...I didn't read.? ?100 mm of water is only 10 cm.? ?That iran't much.? ?but it might allow being a disconnect alarm.? We use up to 50 or 60 cm (500 mm) of water pressure to ventilate a patient. Gordon
On Thu, Mar 26, 2020 at 4:57 PM Gordon Gibby via Groups.Io <docvacuumtubes= [email protected]> wrote: OK, I don't know exactly how to call that without incurring?large long distance costs.? ?is there way to use facetime?
Is that pressure ABSOLUTE (hence, it is just a little bit above atmospheric) -- which is what we think or is it GAUGE ?
On Thu, Mar 26, 2020 at 4:55 PM Ashhar Farhan < farhanbox@...> wrote: Gordon, I don't think i have your number. mine is?+91-9849026029. The sensor can go to 100mm of H2O above atmospheric pressure. - f
VERY IMPRESSIVE!!!!!!!!!? ?I wish I had seen that just a bit ago!!!? You have made fantastic progress!!!!!
I don't understand exactly how your pressure monitor is working.? ?Can you tell me a)? the smallest pressure change you can measure (RESOLUTION) b)? the maximum pressure you can measure with that setup????
We also need a DISCONNECT ALARM.? ?If you add that, you already?meet all the safety requirements.? Disconnect is determined when the inspired pressure fails to significantly rise, despite the fact that you are delivering a breath to the patient.? It means the patient has become disconnected from the tubing.? So instead of seeing 30 cm of H2O pressure....you suddenly?see only 2 or 3 when you deliver a breath.... make sense?
GREAT JOB!? ?You can call me ANYTIME.? ? ?I don't know exactly HOW you call me but I will try.? ?FANTASTIC WORK. gordon
On Thu, Mar 26, 2020 at 4:42 PM Ashhar Farhan < farhanbox@...> wrote: Gents, Please review the candidate hardware. If you guys are fine with the functionality, I will start laying this out. Gordon, what is a good time to call you?
- f
|
But it should be useful to do the crucial DISCONNECT ALARM Gordon
Ah...I didn't read.? ?100 mm of water is only 10 cm.? ?That iran't much.? ?but it might allow being a disconnect alarm.? We use up to 50 or 60 cm (500 mm) of water pressure to ventilate a patient. Gordon
On Thu, Mar 26, 2020 at 4:57 PM Gordon Gibby via Groups.Io <docvacuumtubes= [email protected]> wrote: OK, I don't know exactly how to call that without incurring?large long distance costs.? ?is there way to use facetime?
Is that pressure ABSOLUTE (hence, it is just a little bit above atmospheric) -- which is what we think or is it GAUGE ?
On Thu, Mar 26, 2020 at 4:55 PM Ashhar Farhan < farhanbox@...> wrote: Gordon, I don't think i have your number. mine is?+91-9849026029. The sensor can go to 100mm of H2O above atmospheric pressure. - f
VERY IMPRESSIVE!!!!!!!!!? ?I wish I had seen that just a bit ago!!!? You have made fantastic progress!!!!!
I don't understand exactly how your pressure monitor is working.? ?Can you tell me a)? the smallest pressure change you can measure (RESOLUTION) b)? the maximum pressure you can measure with that setup????
We also need a DISCONNECT ALARM.? ?If you add that, you already?meet all the safety requirements.? Disconnect is determined when the inspired pressure fails to significantly rise, despite the fact that you are delivering a breath to the patient.? It means the patient has become disconnected from the tubing.? So instead of seeing 30 cm of H2O pressure....you suddenly?see only 2 or 3 when you deliver a breath.... make sense?
GREAT JOB!? ?You can call me ANYTIME.? ? ?I don't know exactly HOW you call me but I will try.? ?FANTASTIC WORK. gordon
On Thu, Mar 26, 2020 at 4:42 PM Ashhar Farhan < farhanbox@...> wrote: Gents, Please review the candidate hardware. If you guys are fine with the functionality, I will start laying this out. Gordon, what is a good time to call you?
- f
|
whatsapp works for me. ?farhan
Ah...I didn't read.? ?100 mm of water is only 10 cm.? ?That iran't much.? ?but it might allow being a disconnect alarm.? We use up to 50 or 60 cm (500 mm) of water pressure to ventilate a patient. Gordon
On Thu, Mar 26, 2020 at 4:57 PM Gordon Gibby via Groups.Io <docvacuumtubes= [email protected]> wrote: OK, I don't know exactly how to call that without incurring?large long distance costs.? ?is there way to use facetime?
Is that pressure ABSOLUTE (hence, it is just a little bit above atmospheric) -- which is what we think or is it GAUGE ?
On Thu, Mar 26, 2020 at 4:55 PM Ashhar Farhan < farhanbox@...> wrote: Gordon, I don't think i have your number. mine is?+91-9849026029. The sensor can go to 100mm of H2O above atmospheric pressure. - f
VERY IMPRESSIVE!!!!!!!!!? ?I wish I had seen that just a bit ago!!!? You have made fantastic progress!!!!!
I don't understand exactly how your pressure monitor is working.? ?Can you tell me a)? the smallest pressure change you can measure (RESOLUTION) b)? the maximum pressure you can measure with that setup????
We also need a DISCONNECT ALARM.? ?If you add that, you already?meet all the safety requirements.? Disconnect is determined when the inspired pressure fails to significantly rise, despite the fact that you are delivering a breath to the patient.? It means the patient has become disconnected from the tubing.? So instead of seeing 30 cm of H2O pressure....you suddenly?see only 2 or 3 when you deliver a breath.... make sense?
GREAT JOB!? ?You can call me ANYTIME.? ? ?I don't know exactly HOW you call me but I will try.? ?FANTASTIC WORK. gordon
On Thu, Mar 26, 2020 at 4:42 PM Ashhar Farhan < farhanbox@...> wrote: Gents, Please review the candidate hardware. If you guys are fine with the functionality, I will start laying this out. Gordon, what is a good time to call you?
- f
|
oops, sorry, i meant 100 cm of water. why am I using email like a chat? Gordon, please send me your number? I will call you. I need to discuss this L298N business. Mouser has just over a thousand of them.
- f
On Fri, Mar 27, 2020 at 2:30 AM Ashhar Farhan via Groups.Io <farhanbox= [email protected]> wrote: whatsapp works for me. ?farhan
Ah...I didn't read.? ?100 mm of water is only 10 cm.? ?That iran't much.? ?but it might allow being a disconnect alarm.? We use up to 50 or 60 cm (500 mm) of water pressure to ventilate a patient. Gordon
On Thu, Mar 26, 2020 at 4:57 PM Gordon Gibby via Groups.Io <docvacuumtubes= [email protected]> wrote: OK, I don't know exactly how to call that without incurring?large long distance costs.? ?is there way to use facetime?
Is that pressure ABSOLUTE (hence, it is just a little bit above atmospheric) -- which is what we think or is it GAUGE ?
On Thu, Mar 26, 2020 at 4:55 PM Ashhar Farhan < farhanbox@...> wrote: Gordon, I don't think i have your number. mine is?+91-9849026029. The sensor can go to 100mm of H2O above atmospheric pressure. - f
VERY IMPRESSIVE!!!!!!!!!? ?I wish I had seen that just a bit ago!!!? You have made fantastic progress!!!!!
I don't understand exactly how your pressure monitor is working.? ?Can you tell me a)? the smallest pressure change you can measure (RESOLUTION) b)? the maximum pressure you can measure with that setup????
We also need a DISCONNECT ALARM.? ?If you add that, you already?meet all the safety requirements.? Disconnect is determined when the inspired pressure fails to significantly rise, despite the fact that you are delivering a breath to the patient.? It means the patient has become disconnected from the tubing.? So instead of seeing 30 cm of H2O pressure....you suddenly?see only 2 or 3 when you deliver a breath.... make sense?
GREAT JOB!? ?You can call me ANYTIME.? ? ?I don't know exactly HOW you call me but I will try.? ?FANTASTIC WORK. gordon
On Thu, Mar 26, 2020 at 4:42 PM Ashhar Farhan < farhanbox@...> wrote: Gents, Please review the candidate hardware. If you guys are fine with the functionality, I will start laying this out. Gordon, what is a good time to call you?
- f
|
Ashhar:
My wife is an ER nurse who also has years in ICU/CCU. I showed her your demo video.
She thought that the UI would work. She said that the button terminology should be reviewed. i.e. anything that starts with BP(BPM) in a stressful situation could be interpreted as blood pressure. RR - respiration rate would be a more familiar term to her.
Nice work! James
|
This looks great Farhan! Anything I can help with??
Jack, W8TEE
On Thursday, March 26, 2020, 4:53:24 PM EDT, Gordon Gibby <docvacuumtubes@...> wrote:
VERY IMPRESSIVE!!!!!!!!!? ?I wish I had seen that just a bit ago!!!? You have made fantastic progress!!!!!
I don't understand exactly how your pressure monitor is working.? ?Can you tell me a)? the smallest pressure change you can measure (RESOLUTION) b)? the maximum pressure you can measure with that setup????
We also need a DISCONNECT ALARM.? ?If you add that, you already?meet all the safety requirements.? Disconnect is determined when the inspired pressure fails to significantly rise, despite the fact that you are delivering a breath to the patient.? It means the patient has become disconnected from the tubing.? So instead of seeing 30 cm of H2O pressure....you suddenly?see only 2 or 3 when you deliver a breath.... make sense?
GREAT JOB!? ?You can call me ANYTIME.? ? ?I don't know exactly HOW you call me but I will try.? ?FANTASTIC WORK. gordon
On Thu, Mar 26, 2020 at 4:42 PM Ashhar Farhan < farhanbox@...> wrote: Gents, Please review the candidate hardware. If you guys are fine with the functionality, I will start laying this out. Gordon, what is a good time to call you?
- f
|
My comments:
1- ?I believe that Arduino Uno is more popular and prices may be lower than Nano 2- For supporting the 3 buttons (and one switch) we would need 4 digital inputs.
toggle quoted message
Show quoted text
On Mar 26, 2020, at 5:03 PM, Ashhar Farhan < farhanbox@...> wrote:
oops, sorry, i meant 100 cm of water. why am I using email like a chat? Gordon, please send me your number? I will call you. I need to discuss this L298N business. Mouser has just over a thousand of them.
- f On Fri, Mar 27, 2020 at 2:30 AM Ashhar Farhan via Groups.Io <farhanbox= [email protected]> wrote: whatsapp works for me. ?farhan
Ah...I didn't read.? ?100 mm of water is only 10 cm.? ?That iran't much.? ?but it might allow being a disconnect alarm.? We use up to 50 or 60 cm (500 mm) of water pressure to ventilate a patient. Gordon
On Thu, Mar 26, 2020 at 4:57 PM Gordon Gibby via Groups.Io <docvacuumtubes= [email protected]> wrote: OK, I don't know exactly how to call that without incurring?large long distance costs.? ?is there way to use facetime?
Is that pressure ABSOLUTE (hence, it is just a little bit above atmospheric) -- which is what we think or is it GAUGE ?
On Thu, Mar 26, 2020 at 4:55 PM Ashhar Farhan < farhanbox@...> wrote: Gordon, I don't think i have your number. mine is?+91-9849026029. The sensor can go to 100mm of H2O above atmospheric pressure. - f
VERY IMPRESSIVE!!!!!!!!!? ?I wish I had seen that just a bit ago!!!? You have made fantastic progress!!!!!
I don't understand exactly how your pressure monitor is working.? ?Can you tell me a)? the smallest pressure change you can measure (RESOLUTION) b)? the maximum pressure you can measure with that setup????
We also need a DISCONNECT ALARM.? ?If you add that, you already?meet all the safety requirements.? Disconnect is determined when the inspired pressure fails to significantly rise, despite the fact that you are delivering a breath to the patient.? It means the patient has become disconnected from the tubing.? So instead of seeing 30 cm of H2O pressure....you suddenly?see only 2 or 3 when you deliver a breath.... make sense?
GREAT JOB!? ?You can call me ANYTIME.? ? ?I don't know exactly HOW you call me but I will try.? ?FANTASTIC WORK. gordon
On Thu, Mar 26, 2020 at 4:42 PM Ashhar Farhan < farhanbox@...> wrote: Gents, Please review the candidate hardware. If you guys are fine with the functionality, I will start laying this out. Gordon, what is a good time to call you?
- f
|
We may need another digital input for a potential ¡°end-of-course¡± sensor for the stepper motor.
Upon reset (or power-on) the controller does not know where the ¡°squeezer¡± is positioned. Options are: ? - activate the motor to ¡°find¡± the end-of-course at start-up ? - have the operator to manually position the ¡°squeezer¡±. ? ? ? ?- But the problem is if watchdog triggers and the nurse is away, or ? ? ? ?- Have a mechanic design where the first motion is exaggerated and the mechanics ¡°tolerates¡± the overrun keeping the position at the end of the course without damaging anything.
toggle quoted message
Show quoted text
On Mar 27, 2020, at 7:28 AM, Marcelo Varanda via Groups.Io < mv_email@...> wrote:
My comments:
1- ?I believe that Arduino Uno is more popular and prices may be lower than Nano 2- For supporting the 3 buttons (and one switch) we would need 4 digital inputs. On Mar 26, 2020, at 5:03 PM, Ashhar Farhan < farhanbox@...> wrote:
oops, sorry, i meant 100 cm of water. why am I using email like a chat? Gordon, please send me your number? I will call you. I need to discuss this L298N business. Mouser has just over a thousand of them.
- f On Fri, Mar 27, 2020 at 2:30 AM Ashhar Farhan via Groups.Io <farhanbox= [email protected]> wrote: whatsapp works for me. ?farhan
Ah...I didn't read.? ?100 mm of water is only 10 cm.? ?That iran't much.? ?but it might allow being a disconnect alarm.? We use up to 50 or 60 cm (500 mm) of water pressure to ventilate a patient. Gordon
On Thu, Mar 26, 2020 at 4:57 PM Gordon Gibby via Groups.Io <docvacuumtubes= [email protected]> wrote: OK, I don't know exactly how to call that without incurring?large long distance costs.? ?is there way to use facetime?
Is that pressure ABSOLUTE (hence, it is just a little bit above atmospheric) -- which is what we think or is it GAUGE ?
On Thu, Mar 26, 2020 at 4:55 PM Ashhar Farhan < farhanbox@...> wrote: Gordon, I don't think i have your number. mine is?+91-9849026029. The sensor can go to 100mm of H2O above atmospheric pressure. - f
VERY IMPRESSIVE!!!!!!!!!? ?I wish I had seen that just a bit ago!!!? You have made fantastic progress!!!!!
I don't understand exactly how your pressure monitor is working.? ?Can you tell me a)? the smallest pressure change you can measure (RESOLUTION) b)? the maximum pressure you can measure with that setup????
We also need a DISCONNECT ALARM.? ?If you add that, you already?meet all the safety requirements.? Disconnect is determined when the inspired pressure fails to significantly rise, despite the fact that you are delivering a breath to the patient.? It means the patient has become disconnected from the tubing.? So instead of seeing 30 cm of H2O pressure....you suddenly?see only 2 or 3 when you deliver a breath.... make sense?
GREAT JOB!? ?You can call me ANYTIME.? ? ?I don't know exactly HOW you call me but I will try.? ?FANTASTIC WORK. gordon
On Thu, Mar 26, 2020 at 4:42 PM Ashhar Farhan < farhanbox@...> wrote: Gents, Please review the candidate hardware. If you guys are fine with the functionality, I will start laying this out. Gordon, what is a good time to call you?
- f
|
Couldn't we use limit switches like you see on Mag loops with vacuum variable caps? Our Double-Double controller simply uses micro switches. On a regular cap, we used a NEMA 17 and a 3D printed arm to hit the switches. Power on or reset returned the stepper to 0. You can kinda see the micro switches to the left of the gear belt.
For vacuum caps, we used a screw cam (I don't have a picture of a completed unit). The micro switches were attached to the pillow blocks.
On Friday, March 27, 2020, 7:47:32 AM EDT, Marcelo Varanda via Groups.Io <mv_email@...> wrote:
We may need another digital input for a potential ¡°end-of-course¡± sensor for the stepper motor.
Upon reset (or power-on) the controller does not know where the ¡°squeezer¡± is positioned. Options are: ? - activate the motor to ¡°find¡± the end-of-course at start-up ? - have the operator to manually position the ¡°squeezer¡±. ? ? ? ?- But the problem is if watchdog triggers and the nurse is away, or ? ? ? ?- Have a mechanic design where the first motion is exaggerated and the mechanics ¡°tolerates¡± the overrun keeping the position at the end of the course without damaging anything.
On Mar 27, 2020, at 7:28 AM, Marcelo Varanda via Groups.Io < mv_email@...> wrote:
My comments:
1- ?I believe that Arduino Uno is more popular and prices may be lower than Nano 2- For supporting the 3 buttons (and one switch) we would need 4 digital inputs. On Mar 26, 2020, at 5:03 PM, Ashhar Farhan < farhanbox@...> wrote:
oops, sorry, i meant 100 cm of water. why am I using email like a chat? Gordon, please send me your number? I will call you. I need to discuss this L298N business. Mouser has just over a thousand of them.
- f On Fri, Mar 27, 2020 at 2:30 AM Ashhar Farhan via Groups.Io <farhanbox= [email protected]> wrote: whatsapp works for me. ?farhan
Ah...I didn't read.? ?100 mm of water is only 10 cm.? ?That iran't much.? ?but it might allow being a disconnect alarm.? We use up to 50 or 60 cm (500 mm) of water pressure to ventilate a patient. Gordon
On Thu, Mar 26, 2020 at 4:57 PM Gordon Gibby via Groups.Io <docvacuumtubes= [email protected]> wrote: OK, I don't know exactly how to call that without incurring?large long distance costs.? ?is there way to use facetime?
Is that pressure ABSOLUTE (hence, it is just a little bit above atmospheric) -- which is what we think or is it GAUGE ?
On Thu, Mar 26, 2020 at 4:55 PM Ashhar Farhan < farhanbox@...> wrote: Gordon, I don't think i have your number. mine is?+91-9849026029. The sensor can go to 100mm of H2O above atmospheric pressure. - f
VERY IMPRESSIVE!!!!!!!!!? ?I wish I had seen that just a bit ago!!!? You have made fantastic progress!!!!!
I don't understand exactly how your pressure monitor is working.? ?Can you tell me a)? the smallest pressure change you can measure (RESOLUTION) b)? the maximum pressure you can measure with that setup????
We also need a DISCONNECT ALARM.? ?If you add that, you already?meet all the safety requirements.? Disconnect is determined when the inspired pressure fails to significantly rise, despite the fact that you are delivering a breath to the patient.? It means the patient has become disconnected from the tubing.? So instead of seeing 30 cm of H2O pressure....you suddenly?see only 2 or 3 when you deliver a breath.... make sense?
GREAT JOB!? ?You can call me ANYTIME.? ? ?I don't know exactly HOW you call me but I will try.? ?FANTASTIC WORK. gordon
On Thu, Mar 26, 2020 at 4:42 PM Ashhar Farhan < farhanbox@...> wrote: Gents, Please review the candidate hardware. If you guys are fine with the functionality, I will start laying this out. Gordon, what is a good time to call you?
- f
|
I'll get back to you as soon as possible, have to do some documentation and attend meeting.? ?My take on power:? If we think it will be relible at 12.00 volts, then we may not need the buck/boost controller.? ?Better to provide terminals where people can attach power at the 12V point if needed.? ? Always have some kind of reverse polarity protection.? ? The valves are doing better than I expected so far.? ? I prefer 13.8VDC.
Adding the AIRWAY PRESSURE MEASUREMENT is next most important -- team here has to catch up with where Ashar is.
Suggest adding traces for older style transducer that has nipple/barbs for connection of small tube to the airway -- much more traditional way of doing it.
Problem:? we have had difficulty making a decision on which model.? ?There are only handfuls available at most suppliers:
SUGGESTION:? pick one that appears to be solid technology and then we just beg supplier and manufacturer to make more of them.
I think we have PLENTY of inputs -- so provide traces for the Bosch 280 product, AND an analog or other barbed version.? ?Then local user populates with what is at hand and adjusts code to match.
Pressure measurement is crucial to meet DISCONNECT ALARM and high pressure alarms that will likelly be required by "written specifications" of various nations.? ?
Thank you so much for working on this.? ?I have to get back to paperwork now.
G. Gibby
|
By an ¡°end-of-course¡± sensor I mean a switch.
toggle quoted message
Show quoted text
On Mar 27, 2020, at 8:02 AM, jjpurdum via Groups.Io < jjpurdum@...> wrote:
Couldn't we use limit switches like you see on Mag loops with vacuum variable caps? Our Double-Double controller simply uses micro switches. On a regular cap, we used a NEMA 17 and a 3D printed arm to hit the switches. Power on or reset returned the stepper to 0. You can kinda see the micro switches to the left of the gear belt.
<thumbnail.jpg>
For vacuum caps, we used a screw cam (I don't have a picture of a completed unit). The micro switches were attached to the pillow blocks.
<VCCControl.JPG>
Jack, W8TEE
On Friday, March 27, 2020, 7:47:32 AM EDT, Marcelo Varanda via Groups.Io < mv_email@...> wrote:
We may need another digital input for a potential ¡°end-of-course¡± sensor for the stepper motor.
Upon reset (or power-on) the controller does not know where the ¡°squeezer¡± is positioned. Options are: ? - activate the motor to ¡°find¡± the end-of-course at start-up ? - have the operator to manually position the ¡°squeezer¡±. ? ? ? ?- But the problem is if watchdog triggers and the nurse is away, or ? ? ? ?- Have a mechanic design where the first motion is exaggerated and the mechanics ¡°tolerates¡± the overrun keeping the position at the end of the course without damaging anything.
? On Mar 27, 2020, at 7:28 AM, Marcelo Varanda via Groups.Io < mv_email@...> wrote:
My comments:
1- ?I believe that Arduino Uno is more popular and prices may be lower than Nano 2- For supporting the 3 buttons (and one switch) we would need 4 digital inputs. On Mar 26, 2020, at 5:03 PM, Ashhar Farhan < farhanbox@...> wrote:
oops, sorry, i meant 100 cm of water. why am I using email like a chat? Gordon, please send me your number? I will call you. I need to discuss this L298N business. Mouser has just over a thousand of them.
- f On Fri, Mar 27, 2020 at 2:30 AM Ashhar Farhan via Groups.Io <farhanbox= [email protected]> wrote: whatsapp works for me. ?farhan
Ah...I didn't read.? ?100 mm of water is only 10 cm.? ?That iran't much.? ?but it might allow being a disconnect alarm.? We use up to 50 or 60 cm (500 mm) of water pressure to ventilate a patient. Gordon
On Thu, Mar 26, 2020 at 4:57 PM Gordon Gibby via Groups.Io <docvacuumtubes= [email protected]> wrote: OK, I don't know exactly how to call that without incurring?large long distance costs.? ?is there way to use facetime?
Is that pressure ABSOLUTE (hence, it is just a little bit above atmospheric) -- which is what we think or is it GAUGE ?
On Thu, Mar 26, 2020 at 4:55 PM Ashhar Farhan < farhanbox@...> wrote: Gordon, I don't think i have your number. mine is?+91-9849026029. The sensor can go to 100mm of H2O above atmospheric pressure. - f
VERY IMPRESSIVE!!!!!!!!!? ?I wish I had seen that just a bit ago!!!? You have made fantastic progress!!!!!
I don't understand exactly how your pressure monitor is working.? ?Can you tell me a)? the smallest pressure change you can measure (RESOLUTION) b)? the maximum pressure you can measure with that setup????
We also need a DISCONNECT ALARM.? ?If you add that, you already?meet all the safety requirements.? Disconnect is determined when the inspired pressure fails to significantly rise, despite the fact that you are delivering a breath to the patient.? It means the patient has become disconnected from the tubing.? So instead of seeing 30 cm of H2O pressure....you suddenly?see only 2 or 3 when you deliver a breath.... make sense?
GREAT JOB!? ?You can call me ANYTIME.? ? ?I don't know exactly HOW you call me but I will try.? ?FANTASTIC WORK. gordon
On Thu, Mar 26, 2020 at 4:42 PM Ashhar Farhan < farhanbox@...> wrote: Gents, Please review the candidate hardware. If you guys are fine with the functionality, I will start laying this out. Gordon, what is a good time to call you?
- f
|
Consider replacing LM386 by an oscillator 555 (or use positive feedback on?LM386 to implement an oscillator).
Therefore, Arduino will not need to generate a square wave to enable the alarm; rather, just enable and disable it. LCD library is not very well designed having blocking functions. Alarm may sound ugly if Arduino is generate the square wave while updating LCD and/or monitoring sensors.
I may modify the LCD library to avoid any blocking call. Even so consider my suggestion.
MV
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On Mar 27, 2020, at 8:10 AM, Marcelo Varanda via Groups.Io < mv_email@...> wrote:
By an ¡°end-of-course¡± sensor I mean a switch. On Mar 27, 2020, at 8:02 AM, jjpurdum via Groups.Io < jjpurdum@...> wrote:
Couldn't we use limit switches like you see on Mag loops with vacuum variable caps? Our Double-Double controller simply uses micro switches. On a regular cap, we used a NEMA 17 and a 3D printed arm to hit the switches. Power on or reset returned the stepper to 0. You can kinda see the micro switches to the left of the gear belt.
<thumbnail.jpg>
For vacuum caps, we used a screw cam (I don't have a picture of a completed unit). The micro switches were attached to the pillow blocks.
<VCCControl.JPG>
Jack, W8TEE
On Friday, March 27, 2020, 7:47:32 AM EDT, Marcelo Varanda via Groups.Io < mv_email@...> wrote:
We may need another digital input for a potential ¡°end-of-course¡± sensor for the stepper motor.
Upon reset (or power-on) the controller does not know where the ¡°squeezer¡± is positioned. Options are: ? - activate the motor to ¡°find¡± the end-of-course at start-up ? - have the operator to manually position the ¡°squeezer¡±. ? ? ? ?- But the problem is if watchdog triggers and the nurse is away, or ? ? ? ?- Have a mechanic design where the first motion is exaggerated and the mechanics ¡°tolerates¡± the overrun keeping the position at the end of the course without damaging anything.
? On Mar 27, 2020, at 7:28 AM, Marcelo Varanda via Groups.Io < mv_email@...> wrote:
My comments:
1- ?I believe that Arduino Uno is more popular and prices may be lower than Nano 2- For supporting the 3 buttons (and one switch) we would need 4 digital inputs. On Mar 26, 2020, at 5:03 PM, Ashhar Farhan < farhanbox@...> wrote:
oops, sorry, i meant 100 cm of water. why am I using email like a chat? Gordon, please send me your number? I will call you. I need to discuss this L298N business. Mouser has just over a thousand of them.
- f On Fri, Mar 27, 2020 at 2:30 AM Ashhar Farhan via Groups.Io <farhanbox= [email protected]> wrote: whatsapp works for me. ?farhan
Ah...I didn't read.? ?100 mm of water is only 10 cm.? ?That iran't much.? ?but it might allow being a disconnect alarm.? We use up to 50 or 60 cm (500 mm) of water pressure to ventilate a patient. Gordon
On Thu, Mar 26, 2020 at 4:57 PM Gordon Gibby via Groups.Io <docvacuumtubes= [email protected]> wrote: OK, I don't know exactly how to call that without incurring?large long distance costs.? ?is there way to use facetime?
Is that pressure ABSOLUTE (hence, it is just a little bit above atmospheric) -- which is what we think or is it GAUGE ?
On Thu, Mar 26, 2020 at 4:55 PM Ashhar Farhan < farhanbox@...> wrote: Gordon, I don't think i have your number. mine is?+91-9849026029. The sensor can go to 100mm of H2O above atmospheric pressure. - f
VERY IMPRESSIVE!!!!!!!!!? ?I wish I had seen that just a bit ago!!!? You have made fantastic progress!!!!!
I don't understand exactly how your pressure monitor is working.? ?Can you tell me a)? the smallest pressure change you can measure (RESOLUTION) b)? the maximum pressure you can measure with that setup????
We also need a DISCONNECT ALARM.? ?If you add that, you already?meet all the safety requirements.? Disconnect is determined when the inspired pressure fails to significantly rise, despite the fact that you are delivering a breath to the patient.? It means the patient has become disconnected from the tubing.? So instead of seeing 30 cm of H2O pressure....you suddenly?see only 2 or 3 when you deliver a breath.... make sense?
GREAT JOB!? ?You can call me ANYTIME.? ? ?I don't know exactly HOW you call me but I will try.? ?FANTASTIC WORK. gordon
On Thu, Mar 26, 2020 at 4:42 PM Ashhar Farhan < farhanbox@...> wrote: Gents, Please review the candidate hardware. If you guys are fine with the functionality, I will start laying this out. Gordon, what is a good time to call you?
- f
|
No need for onboard oscillator. Just
use active buzzers like this one:
or even better:
I have been using them for model locators and they are loud and
dependable.? Just a small BJT to drive it, even if probably can be
driven straight by an Arduino output.
RS has 900 in stock in Europe; other
locations to be checked
Raf
Il 27/03/2020 14:01, Marcelo Varanda
via Groups.Io ha scritto:
toggle quoted message
Show quoted text
Consider replacing LM386 by an oscillator 555 (or use positive
feedback on?LM386 to implement an oscillator).
Therefore, Arduino will not need to generate a
square wave to enable the alarm; rather, just enable and disable
it.
LCD library is not very well designed having
blocking functions. Alarm may sound ugly if Arduino is generate
the square wave while updating LCD and/or monitoring sensors.
I may modify the LCD library to avoid any blocking
call. Even so consider my suggestion.
MV
On Mar 27, 2020, at 8:10 AM, Marcelo Varanda
via Groups.Io < mv_email@...>
wrote:
By an
¡°end-of-course¡± sensor I mean a switch.
On Mar 27, 2020, at 8:02 AM, jjpurdum
via Groups.Io < jjpurdum@...>
wrote:
Couldn't
we use limit switches like you see on Mag
loops with vacuum variable caps? Our
Double-Double controller simply uses micro
switches. On a regular cap, we used a NEMA
17 and a 3D printed arm to hit the switches.
Power on or reset returned the stepper to 0.
You can kinda see the micro switches to the
left of the gear belt.
<thumbnail.jpg>
For
vacuum caps, we used a screw cam (I don't
have a picture of a completed unit). The
micro switches were attached to the pillow
blocks.
<VCCControl.JPG>
Jack, W8TEE
On Friday, March 27, 2020,
7:47:32 AM EDT, Marcelo Varanda via
Groups.Io < mv_email@...>
wrote:
We may need another
digital input for a potential
¡°end-of-course¡± sensor for the stepper
motor.
Upon
reset (or power-on) the controller
does not know where the ¡°squeezer¡±
is positioned. Options are:
?
- activate the motor to ¡°find¡± the
end-of-course at start-up
?
- have the operator to manually
position the ¡°squeezer¡±.
?
? ? ?- But the problem is if
watchdog triggers and the nurse is
away, or
?
? ? ?- Have a mechanic design where
the first motion is exaggerated and
the mechanics ¡°tolerates¡± the
overrun keeping the position at the
end of the course without damaging
anything.
?
On
Mar 27, 2020, at 7:28 AM,
Marcelo Varanda via Groups.Io
< mv_email@...>
wrote:
My
comments:
1-
?I believe that Arduino
Uno is more popular and
prices may be lower than
Nano
2-
For supporting the 3
buttons (and one switch)
we would need 4 digital
inputs.
On
Mar 26, 2020, at
5:03 PM, Ashhar
Farhan < farhanbox@...>
wrote:
oops,
sorry, i meant 100
cm of water. why
am I using email
like a chat?
Gordon, please
send me your
number? I will
call you. I need
to discuss this
L298N business.
Mouser has just
over a thousand of
them.
-
f
On
Fri, Mar 27,
2020 at 2:30 AM
Ashhar Farhan
via Groups.Io
<farhanbox= [email protected]>
wrote:
whatsapp
works for me.
?farhan
Ah...I didn't read.? ?100 mm of water is
only 10 cm.?
?That iran't
much.? ?but it
might allow
being a
disconnect
alarm.? We use
up to 50 or 60
cm (500 mm) of
water pressure
to ventilate a
patient.
Gordon
On Thu, Mar 26, 2020 at 4:57
PM Gordon
Gibby via
Groups.Io
<docvacuumtubes= [email protected]>
wrote:
OK, I don't know exactly how to call that
without
incurring?large
long distance
costs.? ?is
there way to
use facetime?
Is that pressure ABSOLUTE (hence, it is
just a little
bit above
atmospheric)
-- which is
what we think
or is it GAUGE ?
On Thu, Mar 26, 2020 at 4:55
PM Ashhar
Farhan < farhanbox@...>
wrote:
Gordon, I don't think i have your
number. mine
is?+91-9849026029.
The
sensor can go
to 100mm of
H2O above
atmospheric
pressure.
-
f
VERY IMPRESSIVE!!!!!!!!!? ?I wish I had
seen that just
a bit ago!!!?
You have made
fantastic
progress!!!!!
I don't understand exactly how your
pressure
monitor is
working.? ?Can
you tell me
a)? the smallest pressure change you can
measure
(RESOLUTION)
b)? the maximum pressure you can measure
with that setup????
We also need a DISCONNECT ALARM.? ?If you
add that, you
already?meet
all the safety
requirements.?
Disconnect is
determined
when the
inspired
pressure fails
to
significantly
rise, despite
the fact that
you are
delivering a
breath to the
patient.? It
means the
patient has
become
disconnected
from the
tubing.? So
instead of
seeing 30 cm
of H2O
pressure....you
suddenly?see
only 2 or 3
when you
deliver a
breath....
make sense?
GREAT JOB!? ?You can call me ANYTIME.? ?
?I don't know
exactly HOW
you call me
but I will
try.?
?FANTASTIC
WORK.
gordon
On Thu, Mar 26, 2020 at 4:42
PM Ashhar
Farhan < farhanbox@...>
wrote:
Gents,
Please
review the
candidate
hardware. If
you guys are
fine with the
functionality,
I will start
laying this
out.
Gordon,
what is a good
time to call
you?
-
f
<thumbnail.jpg><VCCControl.JPG>
|
Yes these are good if too loud put a piece of tape on the opening , cover as required. 73 Kumar
No need for onboard oscillator. Just
use active buzzers like this one:
or even better:
I have been using them for model locators and they are loud and
dependable.? Just a small BJT to drive it, even if probably can be
driven straight by an Arduino output.
RS has 900 in stock in Europe; other
locations to be checked
Raf
Il 27/03/2020 14:01, Marcelo Varanda
via Groups.Io ha scritto:
Consider replacing LM386 by an oscillator 555 (or use positive
feedback on?LM386 to implement an oscillator).
Therefore, Arduino will not need to generate a
square wave to enable the alarm; rather, just enable and disable
it.
LCD library is not very well designed having
blocking functions. Alarm may sound ugly if Arduino is generate
the square wave while updating LCD and/or monitoring sensors.
I may modify the LCD library to avoid any blocking
call. Even so consider my suggestion.
MV
On Mar 27, 2020, at 8:10 AM, Marcelo Varanda
via Groups.Io < mv_email@...>
wrote:
By an
¡°end-of-course¡± sensor I mean a switch.
On Mar 27, 2020, at 8:02 AM, jjpurdum
via Groups.Io < jjpurdum@...>
wrote:
Couldn't
we use limit switches like you see on Mag
loops with vacuum variable caps? Our
Double-Double controller simply uses micro
switches. On a regular cap, we used a NEMA
17 and a 3D printed arm to hit the switches.
Power on or reset returned the stepper to 0.
You can kinda see the micro switches to the
left of the gear belt.
<thumbnail.jpg>
For
vacuum caps, we used a screw cam (I don't
have a picture of a completed unit). The
micro switches were attached to the pillow
blocks.
<VCCControl.JPG>
Jack, W8TEE
On Friday, March 27, 2020,
7:47:32 AM EDT, Marcelo Varanda via
Groups.Io < mv_email@...>
wrote:
We may need another
digital input for a potential
¡°end-of-course¡± sensor for the stepper
motor.
Upon
reset (or power-on) the controller
does not know where the ¡°squeezer¡±
is positioned. Options are:
?
- activate the motor to ¡°find¡± the
end-of-course at start-up
?
- have the operator to manually
position the ¡°squeezer¡±.
?
? ? ?- But the problem is if
watchdog triggers and the nurse is
away, or
?
? ? ?- Have a mechanic design where
the first motion is exaggerated and
the mechanics ¡°tolerates¡± the
overrun keeping the position at the
end of the course without damaging
anything.
?
On
Mar 27, 2020, at 7:28 AM,
Marcelo Varanda via Groups.Io
< mv_email@...>
wrote:
My
comments:
1-
?I believe that Arduino
Uno is more popular and
prices may be lower than
Nano
2-
For supporting the 3
buttons (and one switch)
we would need 4 digital
inputs.
On
Mar 26, 2020, at
5:03 PM, Ashhar
Farhan < farhanbox@...>
wrote:
oops,
sorry, i meant 100
cm of water. why
am I using email
like a chat?
Gordon, please
send me your
number? I will
call you. I need
to discuss this
L298N business.
Mouser has just
over a thousand of
them.
-
f
On
Fri, Mar 27,
2020 at 2:30 AM
Ashhar Farhan
via Groups.Io
<farhanbox= [email protected]>
wrote:
whatsapp
works for me.
?farhan
Ah...I didn't read.? ?100 mm of water is
only 10 cm.?
?That iran't
much.? ?but it
might allow
being a
disconnect
alarm.? We use
up to 50 or 60
cm (500 mm) of
water pressure
to ventilate a
patient.
Gordon
On Thu, Mar 26, 2020 at 4:57
PM Gordon
Gibby via
Groups.Io
<docvacuumtubes= [email protected]>
wrote:
OK, I don't know exactly how to call that
without
incurring?large
long distance
costs.? ?is
there way to
use facetime?
Is that pressure ABSOLUTE (hence, it is
just a little
bit above
atmospheric)
-- which is
what we think
or is it GAUGE ?
On Thu, Mar 26, 2020 at 4:55
PM Ashhar
Farhan < farhanbox@...>
wrote:
Gordon, I don't think i have your
number. mine
is?+91-9849026029.
The
sensor can go
to 100mm of
H2O above
atmospheric
pressure.
-
f
VERY IMPRESSIVE!!!!!!!!!? ?I wish I had
seen that just
a bit ago!!!?
You have made
fantastic
progress!!!!!
I don't understand exactly how your
pressure
monitor is
working.? ?Can
you tell me
a)? the smallest pressure change you can
measure
(RESOLUTION)
b)? the maximum pressure you can measure
with that setup????
We also need a DISCONNECT ALARM.? ?If you
add that, you
already?meet
all the safety
requirements.?
Disconnect is
determined
when the
inspired
pressure fails
to
significantly
rise, despite
the fact that
you are
delivering a
breath to the
patient.? It
means the
patient has
become
disconnected
from the
tubing.? So
instead of
seeing 30 cm
of H2O
pressure....you
suddenly?see
only 2 or 3
when you
deliver a
breath....
make sense?
GREAT JOB!? ?You can call me ANYTIME.? ?
?I don't know
exactly HOW
you call me
but I will
try.?
?FANTASTIC
WORK.
gordon
On Thu, Mar 26, 2020 at 4:42
PM Ashhar
Farhan < farhanbox@...>
wrote:
Gents,
Please
review the
candidate
hardware. If
you guys are
fine with the
functionality,
I will start
laying this
out.
Gordon,
what is a good
time to call
you?
-
f
<thumbnail.jpg><VCCControl.JPG>
|
Why not just use the Tone library that's available for the Arduino family? A cheap piezo buzzer gives a decent tone. (Some readers may remember my Morse Code Tutor at FDIM, and that used Tone with a buzzer.) In quantity they're about $.20.
Jack, W8TEE
On Friday, March 27, 2020, 9:01:07 AM EDT, Marcelo Varanda via Groups.Io <mv_email@...> wrote:
Consider replacing LM386 by an oscillator 555 (or use positive feedback on?LM386 to implement an oscillator).
Therefore, Arduino will not need to generate a square wave to enable the alarm; rather, just enable and disable it. LCD library is not very well designed having blocking functions. Alarm may sound ugly if Arduino is generate the square wave while updating LCD and/or monitoring sensors.
I may modify the LCD library to avoid any blocking call. Even so consider my suggestion.
MV
On Mar 27, 2020, at 8:10 AM, Marcelo Varanda via Groups.Io < mv_email@...> wrote:
By an ¡°end-of-course¡± sensor I mean a switch. On Mar 27, 2020, at 8:02 AM, jjpurdum via Groups.Io < jjpurdum@...> wrote:
Couldn't we use limit switches like you see on Mag loops with vacuum variable caps? Our Double-Double controller simply uses micro switches. On a regular cap, we used a NEMA 17 and a 3D printed arm to hit the switches. Power on or reset returned the stepper to 0. You can kinda see the micro switches to the left of the gear belt.
<thumbnail.jpg>
For vacuum caps, we used a screw cam (I don't have a picture of a completed unit). The micro switches were attached to the pillow blocks.
<VCCControl.JPG>
Jack, W8TEE
On Friday, March 27, 2020, 7:47:32 AM EDT, Marcelo Varanda via Groups.Io < mv_email@...> wrote:
We may need another digital input for a potential ¡°end-of-course¡± sensor for the stepper motor.
Upon reset (or power-on) the controller does not know where the ¡°squeezer¡± is positioned. Options are: ? - activate the motor to ¡°find¡± the end-of-course at start-up ? - have the operator to manually position the ¡°squeezer¡±. ? ? ? ?- But the problem is if watchdog triggers and the nurse is away, or ? ? ? ?- Have a mechanic design where the first motion is exaggerated and the mechanics ¡°tolerates¡± the overrun keeping the position at the end of the course without damaging anything.
? On Mar 27, 2020, at 7:28 AM, Marcelo Varanda via Groups.Io < mv_email@...> wrote:
My comments:
1- ?I believe that Arduino Uno is more popular and prices may be lower than Nano 2- For supporting the 3 buttons (and one switch) we would need 4 digital inputs. On Mar 26, 2020, at 5:03 PM, Ashhar Farhan < farhanbox@...> wrote:
oops, sorry, i meant 100 cm of water. why am I using email like a chat? Gordon, please send me your number? I will call you. I need to discuss this L298N business. Mouser has just over a thousand of them.
- f On Fri, Mar 27, 2020 at 2:30 AM Ashhar Farhan via Groups.Io <farhanbox= [email protected]> wrote: whatsapp works for me. ?farhan
Ah...I didn't read.? ?100 mm of water is only 10 cm.? ?That iran't much.? ?but it might allow being a disconnect alarm.? We use up to 50 or 60 cm (500 mm) of water pressure to ventilate a patient. Gordon
On Thu, Mar 26, 2020 at 4:57 PM Gordon Gibby via Groups.Io <docvacuumtubes= [email protected]> wrote: OK, I don't know exactly how to call that without incurring?large long distance costs.? ?is there way to use facetime?
Is that pressure ABSOLUTE (hence, it is just a little bit above atmospheric) -- which is what we think or is it GAUGE ?
On Thu, Mar 26, 2020 at 4:55 PM Ashhar Farhan < farhanbox@...> wrote: Gordon, I don't think i have your number. mine is?+91-9849026029. The sensor can go to 100mm of H2O above atmospheric pressure. - f
VERY IMPRESSIVE!!!!!!!!!? ?I wish I had seen that just a bit ago!!!? You have made fantastic progress!!!!!
I don't understand exactly how your pressure monitor is working.? ?Can you tell me a)? the smallest pressure change you can measure (RESOLUTION) b)? the maximum pressure you can measure with that setup????
We also need a DISCONNECT ALARM.? ?If you add that, you already?meet all the safety requirements.? Disconnect is determined when the inspired pressure fails to significantly rise, despite the fact that you are delivering a breath to the patient.? It means the patient has become disconnected from the tubing.? So instead of seeing 30 cm of H2O pressure....you suddenly?see only 2 or 3 when you deliver a breath.... make sense?
GREAT JOB!? ?You can call me ANYTIME.? ? ?I don't know exactly HOW you call me but I will try.? ?FANTASTIC WORK. gordon
On Thu, Mar 26, 2020 at 4:42 PM Ashhar Farhan < farhanbox@...> wrote: Gents, Please review the candidate hardware. If you guys are fine with the functionality, I will start laying this out. Gordon, what is a good time to call you?
- f
|
jjpurdum
Marcelo Varanda