This circuit that imitates the sound of the cowboys' calls with their “louder” was found in a Hands On Electronics from the 80's. The integrated circuits used are from that time.
This circuit was taken from an article in Electronics Now magazine in February 1995. The power...
This circuit was found in a 70s American documentation. The converter can be of any type and the...
This circuit was found in a 1976 documentation. It can be used with old tape recording mechanisms for...