This circuit is from a 1980s Motorola documentation. The circuit can be made with modern equivalent components. The original circuit is for the 115 Vac (110 V) grid and has two settings.
This 50% active cycle TTL clock generates signals from 4 to 20 Hz. Its power must be supplied with 5 V...
This circuit was found in a Ferranti documentation from 1969. The transistors are common types of...
Found in a 1960s documentation, this circuit uses a transistor to drive a relay as well as a set...