The figure shows a circuit that shows how to control an optodiac to trigger a triac from the LM3914 gates. The circuit is from an Electronics Now issue from February 1998.
This detector or window discriminator was found in an old American manual. Comparators or...
The output voltage depends on the zener diode. Zener in the range between 1.2 to 12 V rated to 1 W...
This circuit uses a 100 kHz crystal, but nearby frequencies can be obtained with appropriate...