We found this circuit in a 1964 Electronic Design. The triac and SCR can be replaced with modern equivalents according to the load. The circuit is for 160V network.
This ultra-low power metronome was found in a 1991 documentation. The output transistor is general...
This circuit is based on an operational amplifier that must be powered by a symmetrical source. The...
The Texas TL783 integrated circuit is a three-terminal high voltage regulator with a wide range of...