This 1980s circuit was found in Motorola documentation. The circuit uses period components that admit of equivalents. Light feedback in a modern version can be done by optical fiber.
This DC-DC converter was found in old RCA documentation. The circuit operates at 15 kHz. The...
Found in a 1967 documentation, this infrared amplifier is intended for use in a Nipkow disc camera...
This circuit provides a 1 Hz signal given by the capacitor, which can be changed. The gate is TTL...