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Old 01-23-2016, 08:28 PM   #41
SteveNielsen
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Default Re: ESR meter upgrades

Good to know. Thank you. I am happy with the project.
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Old 01-23-2016, 09:45 PM   #42
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Default Re: ESR meter upgrades

i'm wondering if an adapter could be made for testing optocouplers.
after one gave me some agrivation yesterday!
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Old 01-25-2016, 11:33 AM   #43
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Default Re: ESR meter upgrades

update
Attached Files
File Type: zip GM328A ESR tester (SVN626).zip (31.1 KB, 25 views)

Last edited by stj; 01-25-2016 at 11:48 AM..
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Old 01-25-2016, 03:52 PM   #44
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Default Re: ESR meter upgrades

Quote:
Originally Posted by stj View Post
i'm wondering if an adapter could be made for testing optocouplers.
after one gave me some agrivation yesterday!
That oughta be doable but I think you'd need a 4th test lead configured so you can flash the led side with two leads and check the conductivity of the phototrans side with two in order to preserve isolation. If you weren't concerned about complete isolation I think you could do a basic test with three leads using one common for both sides of the coupler.
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Old 01-26-2016, 03:06 AM   #45
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Default Re: ESR meter upgrades

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update
Do you have the makefiles for these updates?
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Old 01-26-2016, 06:49 AM   #46
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Default Re: ESR meter upgrades

obviously, i had to make them up.

it's not just the makefile,
the source is here:
https://www.mikrocontroller.net/svnb...ster/Software/

the files i'm changing are:
the makefile,
Transistortester.h < to change the version string,
function_menu.c < to make the rotary encoder work better in the menu.
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Old 01-26-2016, 08:42 AM   #47
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Default Re: ESR meter upgrades

Well, I figured you did but what I mean is I want to know more about what you've changed because I'm more curious than can be satisfied with "something vague" as a change description.
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Old 01-31-2016, 04:15 AM   #48
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Default Re: ESR meter upgrades

update
this one fixes a bug wih BJT transistors.
put the makefile in now
Attached Files
File Type: zip GM328A ESR tester (SVN629).zip (38.1 KB, 16 views)
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Old 01-31-2016, 04:19 AM   #49
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Default Re: ESR meter upgrades

Quote:
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Well, I figured you did but what I mean is I want to know more about what you've changed because I'm more curious than can be satisfied with "something vague" as a change description.
on the makefile i had to change the lcd contrast, the battery sense voltdrop, the rotary & serial settings.
maybe the pullup resistors - cant remember - you can diff it now.

on the menu code, i just commented-out all the code that tried to interpret the button duration to do menu up/down so it just does "select" now.
**which is why i say not to use this on a unit without the rotary encoder - you wont be able to navigate the menu!
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Old 01-31-2016, 05:30 AM   #50
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Default Re: ESR meter upgrades

Very cool, thanks much. I haven't updated since I got mine going, been dealing with other non-tech matters lately. I really appreciate the time and energy you put into this project. I know you dig doing it anyway but you've certainly got my gratitude. Thanks buddy
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Old 02-03-2016, 06:21 AM   #51
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Default Re: ESR meter upgrades

wow!
read this:
https://github.com/svn2github/transi...32dbf07841d6a8

time to upgrade the crystal from 8 to 16Mhz

and fresh from the compiler
8 and 16MHz versions
Attached Files
File Type: zip GM328A ESR tester (SVN630).zip (69.5 KB, 21 views)

Last edited by stj; 02-03-2016 at 06:41 AM..
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Old 02-03-2016, 06:57 AM   #52
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Default Re: ESR meter upgrades

Trippy. This project goes on and on... cool. Any particular spec on the 16MHz xtal or will any do that fits?
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Old 02-03-2016, 10:27 AM   #53
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Default Re: ESR meter upgrades

same size as the original
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Old 02-04-2016, 10:44 AM   #54
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Default Re: ESR meter upgrades

new update.
cleaning up the new crystal tester function.

Last edited by Per Hansson; 02-10-2016 at 07:29 AM.. Reason: Removed rev632 due to post below
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Old 02-04-2016, 02:13 PM   #55
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Default Re: ESR meter upgrades

dont download 632 - i made a slip wih the menu code!
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Old 02-05-2016, 11:25 AM   #56
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Default Re: ESR meter upgrades

Is there any advantage to using a 16MHz over the 8MHz other than for crystal/resonator testing?
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Old 02-05-2016, 01:42 PM   #57
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Default Re: ESR meter upgrades

probably not, although it may increase the range of the frequency generator function.
it will also flatten the battery a little faster.
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Old 02-05-2016, 05:49 PM   #58
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Default Re: ESR meter upgrades

another update.
Attached Files
File Type: zip GM328A ESR tester (SVN633).zip (68.7 KB, 16 views)
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Old 02-07-2016, 03:53 PM   #59
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Default Re: ESR meter upgrades

quick warning, dont upgrade to a 16MHz crystal if you didnt already.
i'm looking into if the atmel can be run as nature intended - at 20MHz
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Old 02-08-2016, 10:31 AM   #60
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Default Re: ESR meter upgrades

Ok. I'm not going for the xtal upgrade yet and I'm at SVN630 for now. I haven't had any need to test xtals or resonators but it'd be fun anyway I suppose.
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