This circuit is based on a PIC16F883 that controls a simple lock-in circuit to measure in circuit the ESR and in some cases the capacitance ... different from the PIC16F883 (i.e. a STM32 or an Arduino ...

I was always envious of my friends analog ESR meter that allowed him to check and find bad capacitors while they were still in circuit. The particular meter he had is no longer available. It worked ...

Measuring ESR accurately usually requires applying a small AC signal and measuring the impedance. Plus arduino ADC does not have fine enough resolution to accurately measure the small voltage drops ...

[Peter Demchenko] wanted to use a low power TS555 in an ESR meter design. The problem is, he needed to handle significant current sink requirements for cases where the capacitor under test had a ...