This oscillator provides a sinusoidal signal and can be applied to other operational amplifiers. The stabilization is done by diodes and for the indicated component values the frequency is 1 kHz.
This circuit is designed to activate an automotive alarm after 8 minutes of activation. Of course...
To brighten up those with radios with 4 batteries or more, here's the most economical of our...
Using a DAC038 IC this circuit is from Radio Electronics from May 1983. The circuit must be...