In this circuit the triac conducts when switch S1 is opened. We found it in the October 1987 Radio Electronics magazine. The triac is controlled according to the load.
This circuit generates 50, 100 and 200 Hz signals from a 2.2768 MHz TV crystal. The circuit can be...
The figure shows how to use the LM3900 to drain current from a load of up to 20 mA with the...
Frequency modulated signals up to 500 kHz can be decoded with the PLL we show. The demodulated signal...