I’ve had the need  for a high-voltage differential probe for a long time. Mainly for probing mains connected switch-mode power supplies and such. I looked in to buying one but they are fairly expensive for what they are. You can get 25 MHz bandwidth Chinese ones for around 150 € but anything from Agilent/Tektronix/Fluke will quickly run up to multiple hundreds. I looked in to making one and they seemed […]