This circuit was found in a 1967 Raytheon manual. The transistors are from the time. Equivalent modern transistors can be tried out.
This circuit was obtained from Radio Electronics magazine in May 1958. The circuit uses...
This bidirectional motor control was found in an 80's Electronic Engineering. The circuit uses a...
This 5V power supply with a 1.5 to 3 A current was found in Maxim documentation from the 90s. The...