Auto-dimming lamp circuit diagram

Published:2011/7/20 20:13:00 Author:Ecco | Keyword: Auto-dimming, lamp | From:SeekIC

The circuit is shown as the chart. AC voltage is rectified by the bridge pile, of which one way is stabilized by stabilovolt tube VD through R1 to provide 9V pulse DC voltage for control circuit; another way is added to the light H and SCR VS. Change the conduction angle of VS can change the brightness of light H; the currrent through H is the pulsating DC current. The control circuit uses the pulsating DC current to ensure the output trigger pulse and anode voltage of SCR VS be synchronization.



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