Using a MAX644 this circuit was found in the April 1989 issue of Radio Electronics magazine. The circuit is for a 5 V voltage and 50 mA current output.
Another electronic ignition circuit for cars with positive ground. This circuit is from a Radio...
Found in old American documentation, this circuit makes use of operational amplifiers from the 70s...
We found this circuit in an English magazine from 1976. The magazine no longer exists, but just...