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Motor Bike Brake Horn

Motor Bike Brake Horn

The above circuit is a circuit of motor bike horn.This circuit can be operated from 4.5V to 12VDC  or direct from the brake point of motor bike.Resistor R7 should be replaced with 1-ohm. 1/2W in case of an 8-ohm speaker. T5 is a driver transistor. C3 polarity can be reversed for a sudden off of the circuit.



PARTS LIST

Resistors (all ¼-watt, ± 5% Carbon)

R1, R7 = 2.2 KΩ

R2, R4 = 820 Ω

R3, R5 = 470 Ω

R6 = 4.7 KΩ

R8 = 10 KΩ

R9 = 4.7 Ω, 0.5W


Capacitors

C1 = 22 µF/25v

C2 = 4.7 µF/63V

C3 = 100v/16V

C4 = 0.047 µF

C5 = 0.01 µF

Semiconductors

T1 – T4 = BC148B

T5 = SL100

Miscellaneous

LS1 = 4Ω speaker

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