Found in a 1965 Motorola documentation, this circuit uses a neon lamp as a trigger element. The SCR admits equivalents and the lamp must be incandescent.
Found in a November 1977 Radio Electronics magazine, this digital circuit was described in an...
This circuit is from a manual of linear integrated circuits of the 80s. The operational is of the...
The tone generated by this bell changes when we press and release the switch. The circuit is from...