Found in a 1968 Electronic Design, this circuit makes use of an unusual ultrasonic delay line today.
This receiver uses germanium PNP transistors that can be used from old disused devices. The...
STMIcroelectronics automotive L9907 FET drivers can be purchased from Mouser Electronics. These...
This 1 A circuit was found in a Philips documentation from 1966. The transistor is of the time,...