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555 small car circuit without driver

2017-01-18 13:55  
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555 small car circuit without driver
As shown in the figure 11-1, the control circuit is composed as the core of two 555, the actable multivibrator is made of IC1 and R1, R2, C1, the oscillation period T1=0.693(R1+2R2)C1; the oscillator consists of IC2 and RP, R4, R5, C4, the oscillation period T2=0.693(RP+R4+2R5)C4, T2=2T1 by adjusting RP. After it is connected to power supply, the small car advances, when it meets an obstacle or IC1, IC2 output low voltage synchronously, the car will drop back; it also has a series of actions such as advance, then make a turn, advance again and drop back after U-turn.