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.
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
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