Low frequency oscillator (flashing shine circuit) circuit 2 made by 555 time-base circuit

Published:2011/5/12 2:01:00 Author:Ecco | Keyword: Low frequency , oscillator, flashing, shine , 555 , time-base circuit | From:SeekIC

The chart shows the flashing shine circuit based on 555 circuit,and when the circuit works, two light-emitting diodes will shine alternately. The working principle: The NE555 time-base circuit and Rl、R2、Cl form a low frequency oscillator. When the circuit starts oscillation, the level of pin 3 in theNE555 time-base circuitis variable. When pin 3 is in high level, VD1 loses power and doesn't emit light, VD2 gets power and emits light; when pin 3 is inlow level, VD2 loses power and doesn't emit light, VD1 gets power and emit light. So two light-emitting diodes will shine alternately. When doing the circuit, the diodes could choose red, green or yellow, the difference will be more marked.



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