Electronic enthusiasts provide two typical electric vehicle flasher circuits, and give the parameters and specific instructions in the circuit, I hope to help you!
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1. This circuit consists of an oscillating circuit and a switching circuit. The oscillating circuit is composed of transistors V1, V2, resistors R1-R4 and capacitors C1, C2. The switching circuit consists of a diode VD, resistors R5, R6 and a transistor V3. The ultra low frequency signal generated by the oscillating circuit is applied to the base of V3 via diodes VD and R5. When the steering switch S is placed at R or L, the V3 ultra-low frequency signal is intermittently turned on, causing the turn signal HL1 or HL2 to flash.
2, 12V flasher circuit diagram:
R1=91K-120K R2=3.0K R3=330Ω Rs*=0.017Ω C1=3.3μ/50υ
Rj, Kj are relays, coil resistance Rj - 100Ω
The L* is a 12v / 21w bulb main chip using the LT4761 automotive flash integrated circuit.
The external circuit can be used interchangeably with the U243B and U2043 models of the overseas model.
Note: The Rs* value should be well adjusted. It will not only affect the voltage usage range, but also the double-flash function. Since Rs* has a small resistance value, it should be appropriately adjusted according to different circuit board designs.
The R1/C1 product determines the flash frequency for normal use, and the R1/C1 value can be adjusted appropriately based on the flash frequency requirement.
The bulbs are installed inside of a vehicle. There are many different types of interior bulb. Interior lights for indoor lighting are usually installed in the center of the car interior. It's better to light up the car interior evenly. In addition, the light switch (SW) should be operated on both front and rear seats at the time of layout. SW generally has ON, OFF, and door linkage 3 locations. In order to reduce the thickness of the lamp, 5-10w bulb bulbs are usually used. To meet the illumination requirement of capacious indoor, the power of the bulb that uses is commonly 8~30W. The original reading light in the car is designed to read the map. In order to drive the driver, read the light and light up to the point, only on the required part. The rear reading lamp is the rear seat special reading light, with a larger point light illumination. Be careful not to give the driver and other passengers a sense of vertigo. The light can be connected to the door and switch. When the door is open, the lamp is mounted on the door to illuminate the foot part of the room and the outside foot. In order to give the signal to the back of the car, the installation position should be considered. The lamp has no special switch, but is connected with the door.
Auto Interior Lamp Bulb
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