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Tuesday, January 12, 2016

do it yourself ESR meter

Also noted you did not use stripe board and therefore I will
not be able to check any errors because you have used a different board.

Which country are you from?

Regards Humphrey

Sorry to hear that. I'm here in the Philippines

Hi Marcus,

No problem, actually the reason I asked your country is because I wanted to see if I can send you mine which I did as do it yourself
project.

Using the template I send you I assembled it and worked
first time, I remember a guy from Kenya who did it and never worked and invited
me to his place to check out why his meter is not working.

I was surprised to find he has used a normal linear
transformer and I told me to use the charger transformer and it worked till
today.

so I think even you are missing something small, in fact
with the materials ready and using my template without thinking because the
template is tested and works you will find how easy it is for it to work.

All my template which I share online works, in fact I myself
I started as do it yourself guy and through that I leant a lot.

So don’t give up, just do it one more time but be sure you
have used my template so that in case you get problem I can always give you
support.

All the best my friend

Regards Humphrey

AWESOME NEWS SIR HUMPHREY!

I finally found it out! I realized that I was using a
breadboard (the one for, solder less, temporary prototyping) to connect the 9v
battery to my main circuit. I wondered if parasitic inductances and
capacitances can affect my circuit, which is notorious on breadboards. So I
tried to connect the power supply directly, and then stared to my meter whole
day if it will go unstable. And it worked!!!

I reworked the whole meter to make the final build. Now it
works flawlessly. I know now why people don't use a breadboard to prototype
analog circuits.

Here's photos of my build. I didn't mind to add a project
box any longer. It looks like a Arduino that way. I'll just simply add a
container to keep the dust off

Thanks for the hope Humphrey. I know, I shouldn't give up
either. I know there's something on the circuit waiting for me to be
discovered, which I have.

Congratulations Marcus, very professional work here.

Kudos

Regards Humphrey

Wait, 1 last thing. Can I use this to measure ESR of a
battery like the Blue ESR meter? Although I'll be using this for caps but I'm
still wondering...

Never try that at home... Haha I have never tried that but am sure it will
not work.