Here is a schematic of a 12v normal vehicle battery charger. I personally use a small 10 lb wheelchair battery for use in the capacitor charging of my mobile coilguns. I typically get around 1000 shots off of each charging of the battery, and since I always need a quick charge I had found this nice little 12v battery schematic here. I had found some of the parts were hard to find but when I had completed the circuit it was worth it. It charged up my battery completely, automatically turn's off when done charging completely notifying you with turning off the led. This means no overcharging like most store bought chargers which ruin the battery.
|
|
|
|
|
| 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 |
