Found in an Electronic Design from the 80's, this circuit uses components from that time. He has outputs for activating 8 solenoids from a microcontroller.
This circuit with the 741 operational amplifier was found in the March 1995 issue of Electronics Now...
This circuit was found in a General Electric documentation from 1966. It uses discrete components...
We found this circuit in a French technical documentation from 1982. The circuit can be...