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555 electric bumper cars control circuit

2015-01-30 07:05  
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555 electric bumper cars control circuit
The monostable timing circuit is composed of time base circuit 555 and R1, C1. When the power supply switch SA1, SA2 are connected, C1 is charged by R1, after 1s, C1's voltage is charged to 2/3 VDD(4V), 555 is in reset state, 3 foot's output is low level, the driving tube VT1 is turned on, the closed circuit is made of motor M and voltage source U1, then the motor M obtains the electricity, M turns into normal positive turning, the electric car moves forward straightly. When the electric car meets barrier, C1's electricity is diacharged, 555's 2 foot is low level, 555 is set, its 3 foot turns to high level.