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Simple Battery Charger Vehicle Circuit Diagram


Unlike many boots, this battery charger continuously charges the maximum current, decreasing only near full battery voltage. In this case the full load current source, transformer / rectifier was 4.4A. It tapers to 4A 13.5V, 14.0V 3A, 2A 14.5V and 15.0V in 0A.


Simple Battery Charger Vehicle Circuit Diagram

Simple Battery Charger Vehicle Circuit Diagram


Parts:

Resistors
R1 = 0.32R
R2 = 8.2R Capacitors
C1 = x 10,000 uF 63V
D1 = 1N4004
D2 = 1N4004
D3 = 1N4004
Q1 = MJ1504
IC REG = 7815
BR1 = 1N4004x4
B1 = 12 Volt Battery
TR 20 volts AC

R1 and R2 are as high power resistor 2W, 3W, 5W or higher. Q1 and IC requires a heatsink good. If they are mounted on the same heatsink and will decrease the circuit turns Q1 gets too hot.

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