This programmable sound circuit was found in the July 1978 issue of Radio Electronics magazine. It uses an integrated circuit of the time dedicated to producing effects.
This circuit produces the ticking of a clock on a common piezoelectric transducer. The circuit has an...
The basis of this circuit is a double T in the feedback, which has the components calculated to...
This configuration was found in the Texas Instruments optoelectronics manual. PNP transistors...