Re: USB scope pcb's.

开云体育

Just thought I would let you know that ESET (my AV program) blocked access to download the demo program off of your link below. Here is the exact message:

	Website blocked
		The web page is on the list of websites with potentially dangerous content.
		Access to it has been blocked.

Maybe some bad guys also use the same server??

Dave

On 9/19/2019 4:22 PM, cresswellavenue@... via Groups.Io wrote:

Show quoted text

I have been developing a range of usb pc oscilloscopes.
I am on version 23 now.
This has given me time to improve my pcb layouts using PCBCAD51.
Some of my early designs were poorly routed.
Things like missing ground planes,? High impedance signals too close to clock signals.
Lack of decoupling close to IC's.

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_._,_._,_

Re: USB scope pcb's.

#36344

开云体育

My go-to references for high-speed digital design have always been the two books by Dr. Howard Johnson and Martin Graham:

"High Speed Digital Design: A Handbook of Black Magic" and "High-Speed Signal Propagation: Advanced Black Magic". I was fortunate enough to be able to attend Dr. Johnson's two courses using these books back when the company for which I worked sponsored such things.

Dr. Eric Bogatin also has a lot of good material online. IIRC, his work comes under the rubric of "Be the Signal" (bethesignal.com). He works or worked for Teledyne LeCroy. Dr. Bogatin also has online courses, a couple of which I have attended.

DaveD

On 9/23/2019 1:19 PM, Jan Kok wrote:

That's somewhat interesting to me, since I have a project in mind that could use a couple of 4Ms/s ADCs. If you posted the schematics or layout, I would take a quick look.

I'm wondering what the purpose of your post is.

- Advertising your USB scopes?

- Advertising or just recommending PCBCAD51 as a happy user?

- Sharing some of the things you've learned about layout involving high speed signals? (But in that case, please share links to some of the websites or other materials you've found helpful for high speed signal layout.)

Just curious. It's all fine with me, including advertising. Last time I read the rules for this newsgroup (probably 15 years ago!) I think it said one advertisement per month for things relevant to this group is OK.

You might also consider posting to the electronics101 Yahoo group.

Re high speed signal design and layout: I'm currently taking the online, self-paced training for Mentor HyperLynx SI and PI (Signal Integrity and Power Integrity) packages??. It's an amazing bit of software, useful for designing and laying out multi Gb/s signals. For example, you can specify a board stackup, enter a schematic of a trace (including driver and receiver characteristics, trace (transmission line) lengths and impedances, vias and their characteristics, branches, terminators, etc... and then run simulations and see simulated oscilloscope traces of the signals. That's a pre-layout activity. Post layout, you can extract the trace schematics from the layout and run the simulations again to verify that the layout will work. The simulations can also account for crosstalk.

Mentor makes makes their online, self-paced training available for free to unemployed engineers. Bravo to Mentor for doing that! Of course it's in their self-interest to do that, since people who take that training will spread the word about the product (as I did above) and want to use the software in future jobs.

I've received free training from several other software and semiconductor companies as well. It pays to ask!

On Thu, Sep 19, 2019 at 3:22 PM cresswellavenue@... via Groups.Io <cresswellavenue=[email protected]> wrote:

I have been developing a range of usb pc oscilloscopes.
I am on version 23 now.
This has given me time to improve my pcb layouts using PCBCAD51.
Some of my early designs were poorly routed.
Things like missing ground planes,? High impedance signals too close to clock signals.
Lack of decoupling close to IC's.

--

Virus-free.

Re: USB scope pcb's.

#36343

That's somewhat interesting to me, since I have a project in mind that could use a couple of 4Ms/s ADCs. If you posted the schematics or layout, I would take a quick look.

I'm wondering what the purpose of your post is.

- Advertising your USB scopes?

- Advertising or just recommending PCBCAD51 as a happy user?

- Sharing some of the things you've learned about layout involving high speed signals? (But in that case, please share links to some of the websites or other materials you've found helpful for high speed signal layout.)

Just curious. It's all fine with me, including advertising. Last time I read the rules for this newsgroup (probably 15 years ago!) I think it said one advertisement per month for things relevant to this group is OK.

You might also consider posting to the electronics101 Yahoo group.

Re high speed signal design and layout: I'm currently taking the online, self-paced training for Mentor HyperLynx SI and PI (Signal Integrity and Power Integrity) packages??. It's an amazing bit of software, useful for designing and laying out multi Gb/s signals. For example, you can specify a board stackup, enter a schematic of a trace (including driver and receiver characteristics, trace (transmission line) lengths and impedances, vias and their characteristics, branches, terminators, etc... and then run simulations and see simulated oscilloscope traces of the signals. That's a pre-layout activity. Post layout, you can extract the trace schematics from the layout and run the simulations again to verify that the layout will work. The simulations can also account for crosstalk.

Mentor makes makes their online, self-paced training available for free to unemployed engineers. Bravo to Mentor for doing that! Of course it's in their self-interest to do that, since people who take that training will spread the word about the product (as I did above) and want to use the software in future jobs.

I've received free training from several other software and semiconductor companies as well. It pays to ask!

On Thu, Sep 19, 2019 at 3:22 PM cresswellavenue@... via Groups.Io <cresswellavenue=[email protected]> wrote:

Show quoted text

I have been developing a range of usb pc oscilloscopes.
I am on version 23 now.
This has given me time to improve my pcb layouts using PCBCAD51.
Some of my early designs were poorly routed.
Things like missing ground planes,? High impedance signals too close to clock signals.
Lack of decoupling close to IC's.

--

Re: HP LJ2100 1200 DPI Driver?

#36342

On 20/9/19 7:39 am, Brad Thompson wrote:
tron eee wrote on 9/19/2019 12:17 PM:

Hello All,

Nice group..
For years I've been using the PCBfx foil product for making homebrew SMD PCBs. My printer, an HP LJ2100 supports 1200DPI prints. It is an excellent reliable PCB printer. However, when McNazi$oft forced everyone to upgrade from WinXP, HP chose to obsolete all the old printers by providing the so-called "Universal Driver" which does not support LJ2100 1200 DPI drivers for Vista (yech), Win7 (marginally ok), Win1010 (yech), etc? Aside from having to keep an old PC running XP around, does anyone know of a driver that supports the LJ2100 1200DPI printing mode?Hello--
I'm in the process of setting up a new machine that will run Linux (Ubunto 18-something)
as a replacement for Windows 7 and an attempt to avoid getting sucked into the
Windows 10 vortex.
I'm wondering whether Linux will support your LJ1200? Take a look here...
 ...And open the "release notes here" page. I didn't see a specific mention of the LJ1200 but another variant of that printer may be close enough. Also, someone with Linux experience may be able to help./usr/sbin/lpinfo --make-and-model "HP LaserJet 1200" -m

gutenprint.5.3://hp-lj_1200/expert HP LaserJet 1200 - CUPS+Gutenprint v5.3.1


/usr/sbin/lpinfo --make-and-model "HP LaserJet 2100" -m

gutenprint.5.3://hp-lj_2100/expert HP LaserJet 2100 - CUPS+Gutenprint v5.3.1
gutenprint.5.3://hp-lj_2100m/expert HP LaserJet 2100M - CUPS+Gutenprint v5.3.1


The linux CUPS system uses gutenprint for drivers.

<>

Re: HP LJ2100 1200 DPI Driver?

#36341

tron eee wrote on 9/19/2019 12:17 PM:

Hello All,

Nice group..
For years I've been using the PCBfx foil product for making homebrew SMD PCBs. My printer, an HP LJ2100 supports 1200DPI prints. It is an excellent reliable PCB printer. However, when McNazi$oft forced everyone to upgrade from WinXP, HP chose to obsolete all the old printers by providing the so-called "Universal Driver" which does not support LJ2100 1200 DPI drivers for Vista (yech), Win7 (marginally ok), Win1010 (yech), etc? Aside from having to keep an old PC running XP around, does anyone know of a driver that supports the LJ2100 1200DPI printing mode?Hello--

I'm in the process of setting up a new machine that will run Linux (Ubunto 18-something)
as a replacement for Windows 7 and an attempt to avoid getting sucked into the
Windows 10 vortex.

I'm wondering whether Linux will support your LJ1200? Take a look here...



...And open the "release notes here" page. I didn't see a specific mention of the LJ1200 but
another variant of that printer may be close enough. Also, someone with Linux experience
may be able to help.

73--

Brad? AA1IP

Re: HP LJ2100 1200 DPI Driver?

#36340

I had the same problem with a scanner - made me rather mad to say the least!

I got around it by installing "Windows XP Mode" on my Win7 system which 
runs XP in a virtual machine.

Works a treat and I can scan a document and save it to the Win7 C: 
drive.? It's worth a try with your printer and it's free!

Best of luck

Dave

Show quoted text

On 19/09/2019 17:17, tron eee wrote:
Hello All,

Nice group..
For years I've been using the PCBfx foil product for making homebrew SMD PCBs. My printer, an HP LJ2100 supports 1200DPI prints. It is an excellent reliable PCB printer. However, when McNazi$oft forced everyone to upgrade from WinXP, HP chose to obsolete all the old printers by providing the so-called "Universal Driver" which does not support LJ2100 1200 DPI drivers for Vista (yech), Win7 (marginally ok), Win1010 (yech), etc? Aside from having to keep an old PC running XP around, does anyone know of a driver that supports the LJ2100 1200DPI printing mode?

Thanks in advance..

USB scope pcb's.

[email protected]

#36339

I have been developing a range of usb pc oscilloscopes.
I am on version 23 now.
This has given me time to improve my pcb layouts using PCBCAD51.
Some of my early designs were poorly routed.
Things like missing ground planes,? High impedance signals too close to clock signals.
Lack of decoupling close to IC's.

--

HP LJ2100 1200 DPI Driver?

#36338

Hello All,

Nice group..
For years I've been using the PCBfx foil product for making homebrew SMD PCBs. My printer, an HP LJ2100 supports 1200DPI prints. It is an excellent reliable PCB printer. However, when McNazi$oft forced everyone to upgrade from WinXP, HP chose to obsolete all the old printers by providing the so-called "Universal Driver" which does not support LJ2100 1200 DPI drivers for Vista (yech), Win7 (marginally ok), Win1010 (yech), etc? Aside from having to keep an old PC running XP around, does anyone know of a driver that supports the LJ2100 1200DPI printing mode?

Thanks in advance..
-- 
SETV - Autonomous Instrumentation Platforms for the Detection & Measurement of Suspected ET Objects, sans cameras