Published:2014/4/23 20:17:00 Author:lynne | Keyword: The bidirectional thyristor control for automatic nighttime lighting circuit diagram | From:SeekIC
Illustrates the use of the circuit shown in the illuminance sensor as a phototransistor. During the day when the great illumination, phototransistor L14C1 conduction. Diode VD3 also conducting, the capacitor C2 drop to zero, the two-way and two-way thyristor trigger tube VD5 VT are not turned on, the lamp is not lit. Conversely, night L14C1 not conducting, there are so ST4 and C2 voltage VT conduction, the lamp will automatically light up.
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