In Circuit VR, we look at circuits using a simulator ... want to use the circuit as a comparator as we are here. Other practical problems arise because the op amp isn’t really perfect.

In order to help his friend prepare for a talk at DEFCON this weekend, [Craig] built an IR photodiode amplifier circuit ... op-amp out of saturation when he’s following it with a comparator ...

A simple, low-cost Vehicle Theft Detector device can effectively alert homeowners or occupants if a parked vehicle is moved ...