Car Battery Charger

Sunday, May 19, 2013

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.

PARTS:-

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