This sound effect circuit uses only one integrated. We found it in a 90's EDN. The effects can be modified by changing the components.
We found this circuit in a Radio Electronics from April 1965. The components are from the time and the...
The L coil of this receiver determines the received waveband. The circuit is from a 1963...
Alternating taps on the pressure switch or sensor, cause the output to alternate the high and low...