Hi Michael, I'm trying to figure out what I have to pay attention to when charging and measuring drops. At the moment I try out a bunch of AD620 amplifier modules to make sure that the reading is repeatable, because last year I did a similar test and I later found out that I only got the reading with one of the amplifier boards (after I broke it 🤦). When I can get the same readings with all boards I want to try building a more optimized amplifier, try out different charge sensor designs and later I want to try out detecting smaller drops with higher frequency for finally getting a reliable charge sensor for my CIJ project.
