This control circuit using a low voltage switch was found in the September 1987 Radio Electronics magazine. The triac must be matched to the load and the mains voltage.
The frequency of this oscillator depends on the amount of light incident on the LDR. The circuit,...
This circuit divides the frequency of a signal by two. The circuit is found in the May 1977 issue...
We found this circuit in the Texas Instruments opto-electronics manual. The button resets and the...