Hi,I am going to share the design and construction of an ESR Meter adapter design and construction. The plan is to end up with a design that is similar in appearance to Dave's ucurrent that will allow a DMM to be used as an ESR meter. At this point in time I have not built the circuit.The requirements are:To have a simple design that can be constructed on a single-sided circuit board.Operates at 100kHz.Be a true ESR meter as oppose to an impedance meter.Work in either the 2-Wire or 4-Wire mode.Be well protected from charged capacitors and applied voltages.I will be using LTspice to verify the design goals.