Bicycle tail light flashing

Present roads in good condition than the former Pan. The traffic is convenient. But often ran high speeds. When we use the bicycle at night. Although the reflector attached to the end and car. But it could be dangerous. We should fire the end of the cycle would be better.

Operation of the circuit we used IC1 IC555 Oscillator signal is output at pin 3 of IC1, which frequency can be determined by R1, R2, C1 and output voltage to a current flowing into pin B of Q2. Q2 makes LED1-LED10 will light work. However, if the output signal voltage is 0 volts, Q1 will work,The Q2 stopped LED11-LED20 are bright.When a high voltage again.

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