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.
This dimmer for the 120 V (117 V) network was found in the magazine Electronics Now of August...
This circuit was found in a 1998 documentation. It consists of a timer with a 1-digit indicator for...
This circuit converts parallel signals for serial transmission and a speed that depends on the...