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.

Power Incandescent Flasher (CB11605E)
The control of the triac in this power flasher for incandescent lamps is made by a relaxation...
Direction & Speed Control (CB5370E)
This series motor control circuit was obtained from an old manual from the 80's. The SCRs must be...
6 V Bell Timer (CB12226E)
This circuit, from a 1978 publication, uses a germanium power PNP, but the BD135 can be used for 6...