ESR meter upgrades

[SteveNielsen]

Good to know. Thank you. I am happy with the project.

[stj]

i'm wondering if an adapter could be made for testing optocouplers.
after one gave me some agrivation yesterday!

[stj]

update

[SteveNielsen]

Originally Posted by stj

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.

[SteveNielsen]

Originally Posted by stj

update

Do you have the makefiles for these updates?

[stj]

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.

[SteveNielsen]

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.

[stj]

update
this one fixes a bug wih BJT transistors.
put the makefile in now

[stj]

Originally Posted by SteveNielsen

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!

[SteveNielsen]

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

[stj]

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

[SteveNielsen]

Trippy. This project goes on and on... cool. Any particular spec on the 16MHz xtal or will any do that fits?

[stj]

same size as the original

[stj]

new update.
cleaning up the new crystal tester function.

[stj]

dont download 632 - i made a slip wih the menu code!

[SteveNielsen]

Is there any advantage to using a 16MHz over the 8MHz other than for crystal/resonator testing?

[stj]

probably not, although it may increase the range of the frequency generator function.
it will also flatten the battery a little faster.

[stj]

another update.

[stj]

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

[SteveNielsen]

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.