Found in the 1990 special issue of Radio Electronics Experimenter magazine, this circuit uses an automobile ignition coil. Adjustments can be made to suit the coil.
Suggested by Fairchild in a 1980s publication, this multiplier uses operational amplifiers from that...
We found this circuit in an English publication from 1980. It provides a logical output signal when...
This unusual amplifier configuration is from 1986. The circuit has a high resting current given the...