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555 three colors flash light circuit

2017-02-02 02:59  
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555 three colors flash light circuit
As the figure 17-49 shows, the circuit is composed of the 556 and a dual core light tube. The 2Hz multivibrator is composed of the IC's left part (1/2 556) and the R1,R2,C1.etc; The 0.5Hz multivibrator is composed of the IC's right part (1/2 556) and the R4,R5,C2.etc. The pin-5 and pin-9 of the output port drive the red diode and the green diode to turn on, so we have the three color flash (red, freen and orange), the brightness dazzles the eyes.