Color changing flashlight circuit diagram

Published:2012/8/29 22:07:00 Author:Ecco | Keyword: Color changing , flashlight | From:SeekIC

Multivibrator's two transistor collectors are connected to LED respectively, LED can flash alternately accoring to the cycles of multivibrator, this circuit is widely used such as home decorating. This circuit uses high-gain PNP germanium VT3,VT4 to form a multivibrator, there are two inverters are connected with beginning and end, and interstage uses capacitors C3,C4 for coupling, its working cycle is 1S. Transistor should choose the 9012 or 9015 with collecting electrode electric current being greater than 50mA, emitting tube should choose high-brightness tubes. If you want to change the flashing speed, you can adjust the capacity of C3,C4, or fine tune R3,R4 to change the corresponding resistance.



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