Published:2009-7-13 20:21:00 Author:May | From:SeekIC
Capacitor C1, a 1-μF, 400-V Mylar or similar unit, operates in the circuit as a no-loss, ac-limiting component connected in series with the LED string. The capacitor's reactance acts like a transistor to the ac without the losses found with a standard power resistor. The 1N4004 silicon diode protects the LEDs from reverse-voltage damage. The circuit was tested with 36 red and green LEDs with an operating current of about 15 mA. Additional LEDs might be added in series if you wish, but that will reduce the brilliance of the LED string somewhat.
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