Published:2011/7/22 2:32:00 Author:Joyce | Keyword: Low Frequency, Oscillation , 555 Time-base | From:SeekIC
As shown in the figure is a luminescent circuit, in which the two leds will flicker simultaneously under proper functioning. Principle of this circuit is similar to that of 555 audio oscillator ,the difference between them is that the capacity of the capacitance C1 will increase to 4.7μ F. Therefore, the oscillation frequency of the circuit is very low, and the changing speed of the level of feet 3 of NE555 will slow down. When feet 3 outputs a high level, led VD1 and VD2 will be on and flicker. When feet 3 outputs a low level, the two leds will go out.
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