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.
The thermistor used in this circuit must have a resistance at room temperature between 10 and...
This circuit is intend to be used with low impedance transducers like magnetic pick-ups for...
The interesting circuit shown in the figure can have its gain digitally controlled and have two...