Motorcycle turning strobe light circuit
If the motorcycle does not attract the attention of the passing vehicles when turning, it is easy to cause traffic accidents, so some drivers are used to flashing the headlights when they are in the car or turning to remind the vehicles on the opposite side to pay attention. It is equipped with a set of turning strobe lights, which can automatically flash frequently before and after turning. The striking flash can promptly attract the attention of passing vehicles, and the effect is very good.
Working principle: the flash tube needs to be added with a DC voltage of about 300V at both ends. If it is obtained by the method of low-voltage oscillation boosting, the capacity is small, the efficiency is low, and it is prone to failure. The author splits the thin path and uses the magnetic field of the motorcycle. The 12V AC voltage emitted by the motor while the vehicle is running is boosted by the transformer T1 to about 220V, and then rectified and filtered to obtain a 320V DC voltage, which is added to the two ends of the flash tube all the way, and the other way through R1, R2, T2 The primary charges C3. If the turn switch K3 is turned on at this time, the 12V DC voltage periodically flashes the turn signal via the scintillator. Relay J also periodically pulls in and turns off. When the relay pulls in, the voltage on C3 passes through the relay. The contact of T2 discharges to T2. The secondary of T2 induces a high voltage of thousands of volts to make the flash tube avalanche to conduct, and emit a bright flash. When the relay is opened, C3 recharges. From beginning to end, the principle of the rear strobe light is the same, but the flash time is exactly staggered from the front strobe light. Resistors R1 and R4 can limit the working current of the loop and protect T1, D1 and D2 from the left and right turning signals. K2 is a manual strobe switch. K2 can be turned on in rain, snow or foggy days. At this time, the four turn signals on the car flash at the same time, and the front and rear strobe lights also start flashing, which greatly improves the safety of driving. Selection of components: The step-up transformer T1 should use a good quality single 12V output power transformer, the power should be greater than 5W, the wire diameter of the 12V winding should be thick enough, D uses the 1A / 700V rectifier bridge stack, the trigger transformer, flash tube can Removed from the flash unit sold by Zhengzhou Dongming Electronic Store. C1, C2, C5 use the 10uF / 400V electrolytic capacitor used in electronic energy-saving lamps. If the brightness of the strobe light is not enough, the capacity of C1 and C2 can be increased but the capacity should not exceed 30uF. Otherwise, the flash will be too dazzling and affect the driving safety of others. C3 and C4 use 0.1uF / 630V polypropylene capacitor. The AC waveform from the motorcycle magneto is very poor and contains a lot of spikes. Therefore, high-quality capacitors should be selected for C1 ~ C5, otherwise it will be easy to overheat or burst. J should choose a 12V relay with a larger contact capacity and use the relay as a trigger, which is simple and reliable. The author has tried to use an thyristor and a resistor-capacitor component to form an automatic trigger circuit during the production process. Was abandoned.
The quality of the strobe light directly affects the use effect. The appearance of the motorcycle cannot be damaged during installation. The front strobe light can be installed in the front position light of the model or installed in the headlight, but the flash should be raised 30 The toolbox at the rear of the motorcycle is usually equipped with a red reflector. Although the internal space is very small, as long as it is reasonably arranged, it can be installed into the rear strobe light. If it cannot be put down, the energy storage capacitor can be installed. In the tool box, there are two advantages in this way. The first installation position is higher, which is easier to be found by the vehicle behind, and the second is the red flashing light that is very eye-catching. The turning strobe light produced by the author has been used for nearly half a year, and its performance is stable and reliable. The unique warning effect has attracted the envy of many motorcycle riders.
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