This circuit was found in Ferranti's 1967 documentation. The circuit drives a 40 V relay, but it can be adapted to operate with sensitive lower voltage relays.
This circuit was found in Motorola documentation from the 1980s. PUTs are not common components...
This circuit causes an incandescent lamp to flash according to the input audio signal. The SCR...
This 4-competitor TTL speed game was obtained in a 1980s documentation, but can still be easily...