Published:2011/4/21 21:21:00 Author:Ecco | Keyword: Motor vehicle, steering flasher | From:SeekIC
The motor vehicle steering flasher described in the example uses discrete components, and it has the features of low cost and easy to produce, stable performance, it can be used for motorcycle or car.
The working principle
The motor vehicle steering flasheris composed ofthe flash circuit resistors Rl-R3, capacitor Cl, C2, the transistor V, diode VD and relays K, it is shown in Figure 7-18.
Whenturning signal switch S (in the center), V does not work, K isin the releasing state, HLland HL2are notflashing.
Component selection
Rl uses 2w insurance resistors;
R2 and R3 select 1/4W metal film resistor or carbon film resistors.
Cl uses electrolytic capacitor with voltage in 16V; C2 uses polyester capacitor or CBB capacitor.
V uses S8550 silicon PNP transistor.
VD uses IN4007 silicon rectifier diode.
K selects 4098 DC relay.
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