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.

Diodes and Transistors Tester (CB1531E )
This simple circuit, obtained from a Radio Shack documentation, tests transistors and diodes. The...
555 and 741 Tester (CB18746E)
This simple circuit is intended to test integrated circuits 555 and 741 in 8-pin DIL enclosures. In both...
Infrared Control Receiver (CB24830E)
This is a circuit for receiving signals from the previous transmitter. The circuit uses a common...