Re: 10 turn pot $1 to way too much
If the A/D converter is optimized for analog signals with an output impedance of 10k or less would we not be better off with a 10k or less pot rather than a 100k pot? Willy W1ly
On Sat, May 27, 2017 at 6:20 PM, Allard PE1NWL <pe1nwl@...> wrote: I had mine from Conrad, price was about 10 euro at the time. Yes it's more
expensive but i.m.o. it's definitely worth the money.
Try a Mexican first and then a Vishay and you'll understand.
Try , Art. nr.: 429333
73 Allard PE1NWL
On Sun, May 28, 2017 00:02, OZ9AEW wrote:
> with the price for a VISHAY here in Denmark I think you have tried the
> cheap Mexico first !!!!!!!
> 36 USD exclude shipping
>
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Re: doTuning() mod, utility, vanity
Meanwhile I managed to free up some space by removing some other less
useful stuff, and so I could include your extra printLine2 commands.
Thanks for sharing your idea!
Will be included in the next release v1.14.
73 Allard PE1NWL
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On Sun, May 28, 2017 02:31, KC8WBK via Groups.Io wrote: This is a mod that an individual could add.?????? It was intended as a way
that the user could customize the radio.
If memory is a problem, then perhaps have multiple versions, for
example,?? I currently don't use USB, CW, or RIT.?? I may want them in a
future build but would rather have a stable sketch?? without them, if
memory is low.?? So today I select a minimal version and later if I build
a multiband rig I select a version with USB or other features.
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Re: doTuning() mod, utility, vanity
This is a mod that an individual could add.??? It was intended as a way that the user could customize the radio.
If memory is a problem, then perhaps have multiple versions, for example,? I currently don't use USB, CW, or RIT.? I may want them in a future build but would rather have a stable sketch? without them, if memory is low.? So today I select a minimal version and later if I build a multiband rig I select a version with USB or other features.
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Re: Source of LDR required.
I bet those 40k-400k LDR could work too... too much resistance?, then put the led further away, cover it with something, paint it, place some thin film between the two, or even WAY better use a bigger resistor so the led doesn't shine as bright, what about placing a normal (smaller) resistor in parallel with the LDR?, etc. The point is to experiment, try new things, try to make it work with what you have, and of course learn a lot in the process! :)
73
Dan
On Sat, May 27, 2017 at 3:58 PM, Vince Vielhaber <vev@...> wrote: In trying to figure out what you guys were referring to I did some digging and the one thing I did find was a blog post saying that a 40k-400k LDR that he had on hand didn't work.? But one that went from a few K to about 40k was fine.
Vince.
On 05/27/2017 04:29 PM, Jack Purdum via Groups.Io wrote:
Also note that Peter encased the LED and LDR in electrical tape before
he actually used it. I think shrink tubing would also work. I, too,
believe any LDR would work.
Jack, W8TEE
------------------------------------------------------------------------
*From:* Daniel Isaza <hk4dei@...>
*To:* [email protected]
*Sent:* Saturday, May 27, 2017 4:20 PM
*Subject:* Re: [BITX20] Source of LDR required.
I'd say just about any LDR will work, go ahead and try that circuit
using what you have at hand, experiment, be safe, and overall, have fun!
73
Dan
HK4DEI
On Sat, May 27, 2017 at 7:49 AM, philip yates <phil@...
<mailto:phil@...>> wrote:
? ? I am trying to get the parts together for the VK3YE AGC, and I am
? ? having trouble sourcing the LDR,
? ? does anyone have the details of a supplier that is suitable, or can
? ? I use any? LDR ?
? ? Thanks
? ? Phil - G7BZD
--
? Michigan VHF Corp.? ?? ?
? ? ? ? ? ? ? ? ? ? ? ? ?
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Hi all,
I ordered a LIPO battery from evilbay for a really good price, half expecting it to never arrive... But it did, I The page said about 3 amps at 12v, I plan to use this for SOTA but I was a little wary of the voltage, so I checked it and surely enough It only puts out 10v :( will this be enough for the little bitx? or does it need the rated 12?
Cheers and 73!
ZL4BEN
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Re: 10 turn pot $1 to way too much
I had mine from Conrad, price was about 10 euro at the time. Yes it's more
expensive but i.m.o. it's definitely worth the money.
Try a Mexican first and then a Vishay and you'll understand.
Try conradelektronik.dk, Art. nr.: 429333
73 Allard PE1NWL
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Show quoted text
On Sun, May 28, 2017 00:02, OZ9AEW wrote: with the price for a VISHAY here in Denmark I think you have tried the
cheap Mexico first !!!!!!!
36 USD exclude shipping
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Re: W8TEE TFT/VFO Board from FDIM talk
I just placed my first order with Tayda on the 22nd and got it from Colorado? today (27th).
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Re: 10 turn pot $1 to way too much
with the price for a VISHAY here in Denmark I think you have tried the cheap Mexico first !!!!!!!
36 USD exclude shipping
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Re: 10 turn pot $1 to way too much
I first had a cheap BOURNS pot, it worked OK but requires more "torque" to spin the shaft.
Then I switched to a wirewound VISHAY pot, it's more expensive but it's definitely worth the money!
The VISHAY pot turns very lightly, you can spin the knob with just one finger just like the tuning knob of a commercial rig.
With the cheap BOURNS pot I needed two fingers and more force to turn the knob.
As the tuning knob is the most important control of any rig I wouldn't make comprises and go for the VISHAY.
See datasheet attached.
73 Allard PE1NWL
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Re: Source of LDR required.
check out ebay ?loads of on there
On Saturday, 27 May 2017, 20:26, philip yates <phil@...> wrote:
Is there a part number to look for, as there seems to be quite a few around.
Phil - G7BZD
On Sat, May 27, 2017 at 2:34 PM, Raj vu2zap <rajendrakumargg@...> wrote: As far as LDR's are concerned, use the same value in ohms in the same size.
At 27-05-2017, you wrote:
>I am trying to get the parts together for the VK3YE AGC, and I am having trouble sourcing the LDR,
>does anyone have the details of a supplier that is suitable, or can I use any? LDR ?
>
>Thanks
>
>Phil - G7BZD
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Re: Source of LDR required.
In trying to figure out what you guys were referring to I did some digging and the one thing I did find was a blog post saying that a 40k-400k LDR that he had on hand didn't work. But one that went from a few K to about 40k was fine.
Vince.
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Show quoted text
On 05/27/2017 04:29 PM, Jack Purdum via Groups.Io wrote: Also note that Peter encased the LED and LDR in electrical tape before
he actually used it. I think shrink tubing would also work. I, too,
believe any LDR would work.
Jack, W8TEE
------------------------------------------------------------------------
*From:* Daniel Isaza <hk4dei@...>
*To:* [email protected]
*Sent:* Saturday, May 27, 2017 4:20 PM
*Subject:* Re: [BITX20] Source of LDR required.
I'd say just about any LDR will work, go ahead and try that circuit
using what you have at hand, experiment, be safe, and overall, have fun!
73
Dan
HK4DEI
On Sat, May 27, 2017 at 7:49 AM, philip yates <phil@...
<mailto:phil@...>> wrote:
I am trying to get the parts together for the VK3YE AGC, and I am
having trouble sourcing the LDR,
does anyone have the details of a supplier that is suitable, or can
I use any LDR ?
Thanks
Phil - G7BZD
--
Michigan VHF Corp.
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Re: Source of LDR required.
I will be using sleeving, not tape.
Thanks?
Phill - G7BZD
On Sat, May 27, 2017 at 9:29 PM, Jack Purdum via Groups.Io <econjack@...> wrote: Also note that Peter encased the LED and LDR in electrical tape before he actually used it. I think shrink tubing would also work. I, too, believe any LDR would work.
Jack, W8TEE
From: Daniel Isaza <hk4dei@...>
To: [email protected]
Sent: Saturday, May 27, 2017 4:20 PM
Subject: Re: [BITX20] Source of LDR required.
I'd say just about any LDR will work, go ahead and try that circuit using what you have at hand, experiment, be safe, and overall, have fun!
73
Dan HK4DEI
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Re: Source of LDR required.
Also note that Peter encased the LED and LDR in electrical tape before he actually used it. I think shrink tubing would also work. I, too, believe any LDR would work.
Jack, W8TEE
From: Daniel Isaza <hk4dei@...>
To: [email protected]
Sent: Saturday, May 27, 2017 4:20 PM
Subject: Re: [BITX20] Source of LDR required.
I'd say just about any LDR will work, go ahead and try that circuit using what you have at hand, experiment, be safe, and overall, have fun!
73
Dan HK4DEI
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Re: Source of LDR required.
off to e-bay then, as its one of the few components i do not have.
Thanks
Phil - G7BZD
On Sat, May 27, 2017 at 9:20 PM, Daniel Isaza <hk4dei@...> wrote: I'd say just about any LDR will work, go ahead and try that circuit using what you have at hand, experiment, be safe, and overall, have fun!
73
Dan HK4DEI
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Re: doTuning() mod, utility, vanity
All:
In Allard's defense, it's even worse than he's letting on. Using 87% of the Flash memory is running on the edge, but is probably okay. The really scary statistic is the 74% on the SRAM memory. Recall that all of the data is stored in SRAM and the 74% number is the compile-time use statistic, not the run-time use. As the program runs and functions are called, each of which likely passes more data to the function during the call, the stack memory, which is part of SRAM, is getting skinnier and skinner. Think of a stack of dinner plates. The bottom of SRAM is called the "heap" and that were the global data are stored. So Allard may have several hundred plates at the bottom of the stack already used (i.e., dirty dinner plates!). As temporary data are define in functions and during calls, plates are removed from the stack and used...the unused stack of plates is getting skinnier. That 74% figure is the picture of the dinner plate stack before the restaurant doors are even opened...it's a compile-time statistic. When the program runs, it's like opening the restaurant doors to a bunch of football teams.?
My own experience was that I started getting erratic behavior when I was running around 72% of SRAM memory for one of my programs. (I was using some large graphics temporary variables in SRAM.) What Allard has shoehorned into the Nano is amazing. So, don't let those percentages fool you. He been doing a tight rope act over the Grand Canyon for quite some time now.
Jack, W8TEE?
From: Allard PE1NWL <pe1nwl@...>
To: [email protected]
Sent: Saturday, May 27, 2017 3:48 PM
Subject: Re: [BITX20] doTuning() mod, utility, vanity
Paul,
your idea is a "nice-to-have" one, but unfortunately we're running out of
memory:
original sketch v1.13:
Sketch uses 26886 bytes (87%) of program storage space. Maximum is 30720
bytes.
Global variables use 1521 bytes (74%) of dynamic memory, leaving 527 bytes
for local variables. Maximum is 2048 bytes.
updated sketch:
Sketch uses 26944 bytes (87%) of program storage space. Maximum is 30720
bytes.
Global variables use 1555 bytes (75%) of dynamic memory, leaving 493 bytes
for local variables. Maximum is 2048 bytes.
Low memory available, stability problems may occur.
It's caused by the 3 printLine2 commands that consume a lot of RAM.
73 Allard PE1NWL
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Re: Source of LDR required.
I'd say just about any LDR will work, go ahead and try that circuit using what you have at hand, experiment, be safe, and overall, have fun!
73
Dan HK4DEI
On Sat, May 27, 2017 at 7:49 AM, philip yates <phil@...> wrote: I am trying to get the parts together for the VK3YE AGC, and I am having trouble sourcing the LDR,
does anyone have the details of a supplier that is suitable, or can I use any ?LDR ?
Thanks
Phil - G7BZD
|
Google does a much better job, BUT, pay attention to your spam folder for false positives (aka legit mail).
Vince.
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On 05/27/2017 03:20 PM, Jack Purdum via Groups.Io wrote: All:
I managed to process about 20 orders out of perhaps 60 and Yahoo mail
kicked me off. I tried to log in again and they say they have no record
of W8TEEB40@... <mailto:W8TEEB40@...>. Well, Yahoo has
screwed the pooch one too many times. If you did not get a confirmation
email with the subject line "Order" today, your order is in the Yahoo
mail system...somewhere. Please resend it. Those who did get a
confirmation will have their orders mailed out on Tuesday. (Monday is a
holiday.)
This time, include your address where you would like the package sent
and the number of boards you want. Please note that I have checked the
postage cost which was higher than expected ($2.62 instead of $0.72), so
I raised the board cost to $7.50 postpaid. No extra postage charge for
up to 4 boards.
The new email address is:
W8TEEB40@... <mailto:W8TEEB40@...>
Hopefully Google will do a better job.
Jack, W8TEE
--
Michigan VHF Corp.
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Re: 10 turn pot $1 to way too much
I pay about 2 USD for a " Mexico" 10 turn incl. shipping on Ebay
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Re: W8TEE TFT/VFO Board from FDIM talk
The parts list document suggests where to get parts for the TFT board. The place where you can save some noticeable cash is on the Mega 2560 Pro Mini, the AD9850 module, the TFT display, and the KY040 (threaded shaft) encoders. For these parts, write to an eBay vendor, tell them how many you want to order, and say you're willing to pay XX dollars for them, postpaid to your address. Many will work with you on the price. Tayda Electronics has a distribution facility on Livingston, CO, so things arrive fairly quickly and their prices are good, even quantity 1. For caps and resistors, I'd buy an assortment on eBay. 2600 resistors @ 20 like values works out to less than a half penny each. 1000 caps #20 like values for $7; still less than a penny each. Tayda sells resistors and capacitors for about a penny each, quantity 1. Doing a club build or a co-op like Kevin is talking about can save some cash on the build.
Jack, W8TEE
From: Kevin Gilot <kevinemtid@...>
To: [email protected]
Sent: Saturday, May 27, 2017 3:20 PM
Subject: Re: [BITX20] W8TEE TFT/VFO Board from FDIM talk
Hi Folks, I am just wondering how you all are going to source parts for this build?
I'm not sure you can them all at one source but that would make it alot easier. Anyway, please pass along your suggestions and maybe someone could make a group buy. I Might be willing to handle it.
73, Kevin NZ1I
Sent from my iPhone
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Re: doTuning() mod, utility, vanity
Paul,
your idea is a "nice-to-have" one, but unfortunately we're running out of
memory:
original sketch v1.13:
Sketch uses 26886 bytes (87%) of program storage space. Maximum is 30720
bytes.
Global variables use 1521 bytes (74%) of dynamic memory, leaving 527 bytes
for local variables. Maximum is 2048 bytes.
updated sketch:
Sketch uses 26944 bytes (87%) of program storage space. Maximum is 30720
bytes.
Global variables use 1555 bytes (75%) of dynamic memory, leaving 493 bytes
for local variables. Maximum is 2048 bytes.
Low memory available, stability problems may occur.
It's caused by the 3 printLine2 commands that consume a lot of RAM.
73 Allard PE1NWL
|
Willy
Allard PE1NWL
Bob Benedict, KD8CGH