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.

Neon Power Monitor (CB24103E)
This simple neon lamp power indicator circuit was found in the January 1971 Radio Electronics...
1-Transistor AM Radio (CB18380E)
This elementary receiver with only one germanium transistor was found in a Japanese publication from the...
Regenerative receiver (CB22273E)
This simple 1 transistor circuit was found in an American documentation from the 60's. The...