555 big white mouse training

Published:2011/5/24 2:53:00 Author:TaoXi | Keyword: big white mouse, training, lost box | From:SeekIC

The lost box is composed of three radiant arms, on the top of each arm there is a signal light, the zone which has the light signal is the safety zone. In the experiment, we require each arm should have three functions. The lost box circuit is composed of the step-down voltage stabilization circuit, the constant-current source circuit, the timing sequence control circuit and the three-channel trigger control circuit.etc. The multivibrator is composed of the IC4(555) and 4R1，4R2,4C1, it is used as the timing sequence control circuit, the oscillation period T=0.693(R1+2R2)C1, the tcharging=0.693(R1+R2)C1, it is about 30 seconds, so the high level output time is 30 seconds; tdischarging=0.693R2C1, it is about 15 seconds.



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