Found in old documentation, this oscillator operates with high voltage. The diode must be of the appropriate type with low current and an inverse voltage of at least 100 V.
Found in Radio Electronics this circuit uses a fotodiac to drive a triac. The circuit can use...
This circuit from a 1989 documentation is more suitable for CMOS circuits since it only works with...
We found this circuit in a 1994 documentation. The circuit enables timing at dusk by keeping the...