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.
When a pulse of light reaches the sensor [a CDs cell or LDR] the flip-flop changes its state....
This circuit is an impedance adapter. The circuit is from a Radio Electronics from April 1966. The...
This circuit was obtained in an old American documentation serving only for general purpose NPN...