This circuit turns off when switch S1 is opened. The circuit is from the 1989 Radio Electronics Experimenter edition; The triac must be controlled according to the load.
The selected circuit was obtained in a Texas Instruments opto-electronics manual. The transistors can be...
This circuit is suggested by Texas Instruments' Linear Circuits Applications. It consists of an...
This is a typical quartz crystal oscillator for the 3.5 MHz frequency (80-meter range) used in...