This circuit was found in General Electric documentation from 1966. The circuit is suitable for any triac. It can also operate with other mains voltages.
This circuit is from a 2005 Linear Technology LT6100 Application Note. The circuit provides a...
This circuit is from a 1977 Signetics manual. BC107 transistors can be replaced with BC547 and...
In the figure we have the trip circuit for a relay with audio signals. The circuit is from an 80's...