This circuit produces sounds of 6 different notes depending on the keys activated. The circuit is from a Radio Electronics from May 1965. The transistor must be equipped with a heat radiator.
With this circuit it is possible to use a common hair dryer as a hand dryer. The circuit is timed...
This power supply was found in the same 1990 special issue of Radio Electronics Experimenter...
Suggested by an Electronic Engineering, this circuit uses components of the time. Modern...