汽车电池充电器电路(CarBatteryCharger)

汽车电池充电器电路 (Car Battery Charger)

This charger will quickly and easily charge most any lead acid battery. The charger delivers full current until the current drawn by the battery falls to 150 mA. At this time, a lower voltage is applied to finish off and keep from over charging. When the battery is fully charged, the circuit switches off and lights a LED, telling you that the cycle has finished.

Schematic

Parts

Part
Total Qty.
Description
Substitutions

R1
1
500 Ohm 1/4 W Resistor


R2
1
3K 1/4 W Resistor


R3
1
1K 1/4 W Resistor


R4
1
15 Ohm 1/4 W Resistor


R5
1
230 Ohm 1/4 W Resistor


R6
1
15K 1/4 W Resistor


R7
1
0.2 Ohm 10 W Resistor


C1
1
0.1uF 25V Ceramic Capacitor


C2
1
1uF 25V Electrolytic Capacitor


C3
1
1000pF 25V Ceramic Capacitor


D1
1
1N457 Diode


Q1
1
2N2905 PNP Transistor


U1
1
LM350 Regulator


U2
1
LM301A Op Amp


S1
1
Normally Open Push Button Switch


MISC
1
Wire, Board, Heatsink For U1, Case, Binding Posts or Alligator Clips For Output

Notes
1. The circuit was meant to be powered by a power supply, which is why there is no transformer, rectifier, or filter capacitors border=0>
Part
Total Qty.
Description
Substitutions

C1
1
6800uF 25V Electrolytic Capcitor


T1
1
3A 15V Transformer

BR1
1
5A 50V Bridge Rectifier
10A 50V Bridge Rectifier

S1
1
5A SPST Switch

F1
1
4A 250V Fuse

5. The first time you use the circuit, you should check up on it every once and a while to make sure that it is working properly and the battery is not being over charged.