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