In this 2001 circuit we have the way to trigger an SCR with a phototransistor. The circuit appears elsewhere in this section, obtained from publications from different eras.
Here we show a configuration in which we have a control voltage applied from a voltage divider, which...
This different power control circuit with SCR was obtained from a 1967 magazine. The SCR can be...
The circuit that gave rise to this configuration was found in a magazine of the 1980s with the...