We found this circuit that triggers an SCR in the Encyclopedia of Electronic Circuits volume 5 of 1995. The circuit is powered by voltage according to the warning load.
This circuit can generate signals up to 20 MHz, depending on the crystal. The circuit is TTL and...
We found this circuit in the National Semiconductor Linear Applications Handbook of 1994. The...
For a maximum current of 50 mA the capacitor must be from 470 nF to 250 V if the grid is 110 V and...