12v Car Battery Charger Circuit Diagram. This is a schematic diagram of a full automatic 12v battery charger for charging the batteries of automobiles etc. 12v battery charger with auto cut off circuit diagram.
T1 2N2218 T2 2N3055-BDW21C 1C1 UA741 PT1 KBL04 01 1 Socket 8 pins. Resistors 1O 5W 1KO x 2 12KO 15KO x 2 10KO. For safe working and to avoid overcharging of battery absorption voltage is selected as 141V and floating voltage is selected as 136V.
7808 voltage regulator is used for constant supply to the operation of the circuit to cut at a required fixed voltage.
One 555 timer ic is used for detecting the voltage level and Relay is used to disconnect the AC input. Here is a simple and easy to build circuit diagram of a 12V car battery charger. T1 2N2218 T2 2N3055-BDW21C 1C1 UA741 PT1 KBL04 01 1 Socket 8 pins. Once we attach the charger with the battery voltage drops from the actual supply 142 V level to the discharged level of the battery.
