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Vehicle flashing lights controller circuit

This example describes the motor vehicle flashing lights controller , with lantern cycle, braking and steering flash 3 flash function as a motorcycle or car taillights decorative lanterns .

Circuit works

The motor vehicle flashing lights from the low-frequency oscillator control circuit , the brake / Night Light control circuit , turn signal circuit and LED lighting controller circuit , as shown in Figure 7-28 . Schmitt trigger low-frequency oscillator circuit consists of integrated circuit IC (D1-D6) within D1, resistors R1, R2, capacitor Cl and diode VD7, VD8 composition .

Brake / Night Light control circuit by the resistors R3-R8, capacitor C2, C3 diode VD1, VD2, VD5, VD6, VD9-VD11, VD23 and crystal V1, V2 composition . Turn signal control circuit by the diode VD3, VD4, VD22, resistors R9-Rl5, capacitor C4 and D4 Schmitt trigger IC internal composition . LED lighting circuit from the diode VDl2-VD2l, resistors R16-R2l, IC internal Schmitt trigger D2, D3, D5, D6, transistor V3, V4 and LED VLl-VLl8 composition .

Night driving at night when the lights turn on when the lights from the vehicle 's Night by the VD2 + l2V voltage power supply for the IC to provide work to the work of low-frequency oscillator oscillation , the negative in VD8 produce low-frequency pulse signal . When the pulse signal is positive pulse , VD9 and VDlO turn to Schmitt trigger D2, D3, D5 and D6 output low , VDl2 and VDl3 end , VLl-VL8 not light .

At this point Vl turn , VL9-VLl4 light . When the pulse signal is low when , Vl end , VL9-VLl4 out , VD9 and VDlO end , D2 and D6 Schmitt trigger output is high , so VDl3 and VDl6 turn , VL5-VL8 and VLl5, VLl6 light . When C2 after discharge through R3 , D3 and D5 Schmitt trigger output is high , so VDl2 and VDl8 turn , VLl-VL4 and VLl7, VLl8 lit. When the pulse signal again goes high , Vl conduction , VL9-VLl4 light ; Schmitt trigger D2, D3 and D5, D6 then the output low , so VLl-VL8 off, and repeat the process, thereby Changed the lighting effects.

When the driver depresses the brake pedal brakes, brake lights from the road by VDl + l2V voltage supplies power for the IC ; another pass through R5, VD5 and VD6 to Schmitt trigger D3, D5 and D2, D6 output Low . High in the low-frequency oscillator output pulse , Vl and V2 turn , VLl-VLl8 all lit . In the low-frequency oscillator output low pulse , Vl and V2 closed , VLl-VLl8 it all off , the above process is repeated , can produce bright warning light signals to alert vehicles behind keeping a distance between vehicles . Vehicle left ( or right) turns from the left (or right) turn signal on the +12 V voltage all the way through VD3 ( or VD4) added to the evidence VDl9-VD2l pole, another pass through R9 ( or RlO) to V4 (Or V3) turn , will VLl3, VLl5, VLl7 ( or VLl4, VLl6, VLl8) lit .

The practical application of the LED light-emitting diode array , can be VLl-VLl2 installed in the middle of the display panel will VLl3, VLl5 and VLl7 installed in the display panel to the left as the left- turn indicator will VLl4, VLl6 and VLl8 Security Installed in the display panel on the right as the right turn indicator .

Components Selection Rl-R2l use 1/4W metal film resistor or a carbon film resistors .

Cl and C2 chosen monolithic capacitor or polyester capacitors ; C3 and C4 were selected voltage value of 16V aluminum electrolytic capacitors .

VDl-VD23 1N4007 type silicon rectifier diodes are used .

VLl-VLl8 use f8mm or f12mm red high-brightness light emitting diodes.

Vl-V4 are all made of silicon NPN transistor S8050 .

IC type used CD40106 or CC40106 six Schmitt Trigger ICs .

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Vehicle flashing lights controller circuit