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 was found in old Maxim documentation. Check the availability of the IC if you are...
Found in documentation from the 1980s, this amplifier uses an integrated circuit from the time....
This circuit was found in the 1972 RCA Power Transistor Databook. Transistors can be replaced by...