This circuit can be used to generate percussion sounds such as bell, triangle, etc. The circuit must be powered by symmetrical source and the triggering is by external pulse.
Found in a 1960s RCA documentation, this circuit applies to most common triacs. The trigger device is a...
This metal detector was found in a French magazine Radio Plans from 1977. The phone can be a...
This circuit is from a Linear Technology integrated circuit manual from the 1990s. The circuit...