ESR-Meter – Update

There was another adaptation on the pcb that was not in the circuit diagram above.

The LCD has to be connected differently. I don’t know why anymore, but here is the new circuit diagram:


I received Eagle files from Predrag Mihajlovic for this esr meter. They can be downloaded here: Link.
I did 2 versions. First is one based on your schematics, except that I’ve changed those smd capacitors for standard through hole ones. Second one is somewhat modified. I’ve excluded transformer and put in standard dc jack. Also, pic and display header are located so far away from other stuff so that there is enough place for display to be on the pcb. Also, you’ll see that, on both versions I’ve also put pads for 27 and 22mm capacitors (4.7uF). Check it out and feel free to make any modifications you think are necessary. You can put it on your website if you like, maybe someone will find it useful 🙂


    • pete guglielmo on August 28, 2017 at 20:02
    • Reply

    hi, is the hex code available for this project?

    1. Hello,

      Yes, it is in the previous update:

      Complete project overview:


Leave a Reply to Stynus Cancel reply

Your e-mail address will not be published.

This site uses Akismet to reduce spam. Learn how your comment data is processed.