This circuit is from an 80's documentation, firing when the input voltage exceeds 5 V. The SCR can be the TIC106 need not have a heatsink.
Found in an Electronic Design from the 80's, this circuit monitors a three-phase line, activating a...
This circuit or practical idea comes from a time when cheap solar cells were not available (1992). What is...
This circuit indicated for didactic applications in technical schools was found in a 1982...