Tunnel diode simple noise generator (CB23705E)

This circuit was found in Radio Electronics magazine from November 1960. The circuit is powered by a photocell of the time.

Current Regulator 3 A LM323 (CB15318E)
This circuit was obtained in the Motorola Linear Interface ICs of 1993. The current is determined by the...
Megaphone (CB23702E)
This circuit with two power transistors was found in Radio Electronics magazine from October 1960....
Electronic Organ with Trembling (CB16275E)
This simple electronic toy organ produces an interesting sound, which can be used by the most...