This high quality circuit with complementary symmetry was found in an Electronics World of 1966. It can be made with modern transistors like the BD or TIP series.
The circuit shown in the figure allows a pressure switch to be used to turn a load on and off in a...
Raytheon's used integrated circuit is no longer common today. The circuit was obtained in a...
Found in a 1968 Electronic Design, this circuit makes use of an unusual ultrasonic delay line...