Roman numeral display (CB22160E)

This circuit shows numbers I II and III when mounted on its side, depending on the position of the selector switch.

Inverter Amplifier with Arbitrary Reference (CB19844E)
This circuit was obtained in a Motorola manual, but it applies to almost any operational...
Circuit contact protection with relay (CB8634E)
Found in a 1990s Motorola documentation, this circuit aims to protect a triac that drives an...
1 W Amplifier with the TAA300 (CB6164E)
Found in a 1968 documentation, this small amplifier was very popular at the time being used in...