Low Frequency Oscillation Circuit(Luminescent Circuit ) Based on 555 Time-base Circuit Two

Published:2011/7/22 2:47:00 Author:Joyce | Keyword: Low Frequency, Oscillation , 555 Time-base | From:SeekIC

As shown in the figure is a flasher circuit centering on 555 circuit .LED VD1 and VD2 will flicker alternately under proper functioning. Principle of the circuit is briefly described as follows: Time base circuit NE555 and R1, R2, C1 compose the low frequency oscillator. After the circuit starts oscillation, the level of feet 3 of time base circuit 555 will change. When feet 3 is high level, VD1 will be cut off and it will not flicker, but VD2 will. When feet 3 is low level, VD1 will be on and flicker ,while VD2 will be cut off and stop flickering .So,the two leds will flicker alternatively. Colors of the two LEDs should be red, green or yellow since it would make the difference more obvious.



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