This is a basic circuit of car horn and lamp flasher that starts playing the vehicle horn at whatever point your vehicle is backward rigging. The circuit (First Diagram) utilizes double clock NE556 to create the sound. One of the clocks is wired as an astable multivibrator to produce the tone and the other is wired as a monostable multivibrator.
How the reversing gear horn and lamp flasher circuit work
Working of the circuit is basic. At the point when the vehicle is backward rigging, turn around gear switch S1 of the vehicle gets shorted and the monostable clock triggers to give a high yield. Thus, the intersection of diodes D1 and D2 goes high for a couple of moments relying upon the timeframe created through resistor R4 and capacitor C4. Now, the astable multivibrator is empowered to begin swaying. The yield of the astable multivibrator is taken care of to the speaker through capacitor C6. The speaker, thus, produces sound until the yield of the monostable is high.
At the point when the intersection of diodes D1 and D2 is low, the astable multivibrator is debilitated to quit wavering. The yield of the astable multivibrator is taken care of to the speaker through capacitor C6. The speaker, thusly, doesn’t deliver sound.
Collect the circuit on a universally useful PCB and encase in an appropriate bureau. Interface the circuit to the vehicle invert switch through two wires with the end goal that S1 shorts when the vehicle gear is turned around and is open in any case. To control the circuit, utilize the vehicle battery.
The flasher circuit (Second Circuit) is worked around clock NE555, which is wired as an astable multivibrator that yields square wave at its pin 3. A 10W auto bulb is utilized for flasher. The glimmering pace of the bulb is chosen by preset VR1.
Gather the circuit on a universally useful PCB and encase in a reasonable bureau. The flasher bulb can be mounted at the vehicle’s back side in a reflector or a tight painted appropriate fenced in area.
Horn and Lamp Flasher Circuit Note
A higher-wattage bulb may diminish the force of the front lamp. You can encase both the carreversing horn and flasher circuits together or independently in a bureau in your vehicle.
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