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1、汽車電池充電器電路 (Car Battery Ch arger) 作者：佚名 來源：本站整理 發(fā)布時間：2009-12-29 9:03:26 ［收 藏］［評 論］ 3|汽車電池充電器電路 (Car Battery Charger) This charger will quickly and easily charge most any lead acid battery. The charger deli vers full current until the current drawn by the battery falls to 150 mA. At this time, a l

2、ower voltage is applied to finish off and keep from over charging. When the battery i s 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 3K 1/4 W Resi

3、stor 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 1N457 Diode Q1 1 2N2905 PN

4、P 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 t ransformer, rect

5、ifier, or filter capacitors on the schematic. There is no reason why you cannot add these. 2. A heatsink will be needed for U1. 3. To use the circuit, hook it up to a power supply/plug it in. Then, connect the batter y to be charged to the output terminals. All you have to do now is push S1 (the

6、 "Start " switch), and wait for the circuit to finish. 4. If you want to use the charger without having to provide an external power supply, use the following circuit. To Charger 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.