hi all, I recently completed the build of two esr meters. one can be found here:http://www.electronics-lab.com/project/advanced-lc-meter/ this meter works but shows the esr of electrolytic capacitors as a negative value(no such thing). the second meter can be found here:http://www.qsl.net/yo4hfu/ESR.html this meter will not hold the zero adjust value, once set it drifts to a new value. need some help on both problems. thanks a bunch.