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.

1-Transistor Ignition (CB23647E)
We found this circuit in a Radio Electronics from April 1965. The components are from the time and the...
500 mW Amplifier TA7117P (CB18897E)
This old integrated amplifier is from a Japanese publication from 1972. The integrated circuit is...
Photoelectric Alarm (CB16921E)
This circuit is from an old European documentation, already influencing the unijunction oscillator that...