Bicycle turn signal circuit principle
Source: InternetPublisher:酷到被通缉 Updated: 2021/09/29
As shown in the figure, the circuit consists of a multivibrator with 555 as the core and some micro buttons, indicator bulbs, etc.
555 and R1, PR2, C2, etc. form an astable multivibrator. The oscillator period T=0.693 (R1+RP) C1. The lowest frequency of the parameters shown in the figure is about 1Hz. RP can be adjusted to change the frequency and duty cycle. Close to 1:1, VT1 and VT2 are the driving poles. When turning left, press K1, the small light on the left will flash, and at the same time, the speaker will make a "beep" reminder sound. When turning right, it is the same as the previous one. .
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