Here is my ESR meter that i build from some junk parts. Kinda not good explanations, because of my technical knowledge in English. The board that you see at the top is the old version that was giving 4.5v and wasnt really good to "in circuit" tester, so i went for this one. Used this schematic [ Ссылка ] but changed the design a bit so i can fit 100uA with high coil resistance for Ammeter. The changes are the common emitter/collector resistors and passing 2 of the zener diodes.

Most of the parts are from recycled parts or junk from old projects, even the green LED i took from one old alarm system.

свернуть