$20 LCR ESR Transistor checker project

[madires]

The BSide ESR02 has an ST7565 compatible display. If the display output is shifted you can change LCD_ST7565_H_OFFSET in the Makefile (from 4 to 0) and recompile the firmware. In case you like to try the m-firmware please see https://github.com/roger-/bside-firmware for a compiled m-firmware.

[Yuriy_K]

I burned mega328_st7565 to the tester, and that is the only one which is kinda working except that the screen size doesn't fit

I really don't know what to do with the makefile or how to use it, looks like a compiling thing

Did some tests still the same problem with those uF's

Your problem is that you need to have some knowledge of programming and understand how to configure some parameters in the makefile.
Here I fixed the horizontal offset of the text displayed on the display...

Now about the value of large capacities. In the firmware you can adjust this value, but you must take into account that the readings measured at a constant current differ from the readings at a frequency of 100 Hz. At 100 Hz the readings are noticeably lower...

[Davo013]

Wow Thnx 
Why is the battery voltage doubled? i
You are totally right, it's the lack of  knowledge...

I know electronics but, programming is a whole other department
It took so many time only to get where i'm now, and programming etc, i don't have the time for that, electronics is what i like.
I find this stuff quite interesting, i like to repair stuff, to much stuff is thrown in the garbage trunk.
A while ago i found this topic, and i thought okay, let's give it a try though...
It really took me a-lot of energy to repair the bside & burn the firmware
I Don't have linux, and if i have to setup a linux system & learning all of the other stuff is giving me to much stress to keep everything going over here
sometimes it's better to throw things away and give up, and buy another one...
Life lol

Iám aware about the freq at 100/120 hz but hasn't that more effect on the esr as for the capacity

[Davo013]

The higher battery voltage was already in the firmware i just saw it in my other pictures....

[madires]

The OSHW firmwares can be also compiled on MacOS and Windows.

[Davo013]

So with command prompt in windows you open avrdude.exe, and with the makeme file + .hex & .eep you have to upload it somehow into the 328 or just in windows memory and then compile it.
all those code's in avrdude not as easy as it looks... doing it the right way..
isn't there some decent tutorial or so?

maybe we have to a  little bit longer for a.i haha

[madires]

There's a ton of tutorials and videos. Please search for 'AVR toolchain for windows'.

[Yuriy_K]

Why is the battery voltage doubled? i
You are totally right, it's the lack of  knowledge...

Iám aware about the freq at 100/120 hz but hasn't that more effect on the esr as for the capacity

I have corrected the settings for the battery and some parameters for the example. You can compare it with the previous firmware.
I use the WinAVR environment to compile the firmware.

[Davo013]

I found comparator and i can see what you changed next nice work!

I have winavr installed & ii’m trying to figure out how to run everything

[Davo013]

This is going to take to much time & frustration to learn...
I haven't got that much experience in this kinda stuff
Butt I really appreciate your help bro! & Madires also! 
Maybe it's simple? I don't know... watching all those vids  made it look more harder for me

[Davo013]

There's something wrong & i doný know what is causing it...

When i attach a small capacitor 22 or 47uF and click on the button, Testing... and after the 3rd point the power goes off??
this is with a 4700uF also, when i use 3300uF it works okay: testing....... and then the capacitor test
Really weird... the battery is 8.3v so that's enough, i never had those problems even at 7v it worked.
It looks like it's crashing or so

Well i did some testing and with a 9.3v battery and the meter didn't crash with values between 330uF & 3300uF that is quite odd
And values from 1uF/8,2uF didn't make it crash also, if it take a cap between 10uF and 330uF it crashes
I tried a few other firmwares and the problem stays the same WTF is going wrong??

[Kim Christensen]

Well i did some testing and with a 9.3v battery and the meter didn't crash with values between 330uF & 3300uF that is quite odd

Maybe it's a combination of regulator voltage dropout spec and a battery with higher than normal ESR? Perhaps when testing larger capacitors, the unit draws a bit more current...
What voltage regulator does your tester use?

[Davo013]

This one

[Davo013]

it's a kinda strange that 1uF/8,2uF it works,
from 10uF/220uF it crashes,
from 330uF.3300uF it work
From 4700uF it crashes 
tried different voltages etc

but when it's on what a cap from 470uf and i replace it with a 220uf it works
you could have a point there with esr while booting the regulator is 5v 30mA

There.s another 3.5v but that one for the display