Motor vehicle steering flasher 11

Published:2011/4/21 22:07:00 Author:Ecco | Keyword: Motor vehicle, steering flasher | From:SeekIC

The motor vehicle steering flasher described in the example is a non-contact electronic flash which uses a VMOS power field effect transistor and 555 time base circuit. It has the features of long life, good effects, alternative use of magnetic motor steering and electronic flasher. The working principle The motor vehicle steering flasher circuit is composed of multivibrator, audio driver and flash control circuit, it is shown in Figure 7-20. Multivibrator circuit consists of time-base integrated circuit IC, resistor Rl, saturated capacitors Cl, C2. Audio driver circuitis composed ofthe resistor R3, transistor V, and the speaker BL. Flash control circuit is composed of VF power field effect transistors by the VMOS, diode VDl, VD2, resistors R4, turn signal HLl-HL4 and turn signal switch S. Component selection RI-R4 selects 1/4W carbon film resistor or metal film resistors. Cl selects electrolytic capacitor with voltage in 16V; C2 uses polyester capacitorsor monolithic capacitor.



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