Red and green LED flasher circuit diagram

Published:2011/8/31 20:51:00 Author:Lucas | Keyword: Red LED flasher , green LED flasher | From:SeekIC

An amplifier in the LM324 quad op amp is connected as a square wave oscillator to make each LED flash once per second. Two light-emitting diode series resistors is different, because they require different forward voltages. If LED2 has low light between the two flashing interval, the resistance R6 can be slightly increased. R6 is too high to reduc LED2's flashing brightness. The supply voltage can be use 5V or 6V.



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