This circuit appeared in the May 1983 issue of Radio Electronics magazine. It is based on the dedicated integrated circuit CEM3340. The circuit provides signals with various waveforms.
This circuit was found in a Radio Electronics from October 1952. The circuit equalizes the sounds...
This low frequency square wave oscillator using the 741 Operational Amplifier produces sound when...
We found this circuit in an old documentation. The instrument can be an ordinary multimeter in the...