2-bit decoder 7400 (CB22421E)

This circuit decodes a two-bit value into four outputs (one of four). The circuit must be powered by a voltage of 5 V.

Colpitts Oscillator (CB6185E)
This circuit was obtained from an American 1980s documentation. The frequency depends on the...
Unijunction metronome (CB21701E)
This traditional metronome circuit is powered by voltages from 9 to 12 V and output drives a...
Metal locator (CB7883E)
Found in a 1966 documentation, this “coin finder” uses components from the era operating at 2.1...