For example, a 12V lead acid battery is made up of a series connection of 6 cells in series. Each cell nominal voltage will be 2V. So, a float charger has to charge each cell of this battery at 2.25V.

The circuit diagram of the Arduino-controlled 12V automatic battery charger is shown in Fig. 1. It is built around Arduino Uno (Board1), adjustable voltage regulator LM338 (IC1), 12V voltage regulator ...

Q1 = MJ1504 IC = 7815 REG BR1 = 1N4004x4 Miscellaneous B1 = 12 Volt Battery Notes: Charger’s input voltages are 20 volt AC R1 and R2 are high wattage resistor like 2W, 3W, 5W and could be above.

This battery charger circuit can be used to charge one or more batteries with the total nominal voltage of 12 V, meaning ten NiCd battery or six 2 V lead acid. The circuit is pretty small and can be ...

Circuit of the 12V battery charger-cum-variable power supply is shown in Fig. 1. It is built around two LM138 variable voltage regulators (IC1 and IC2), dual op-amp LM358 (IC3), 12V voltage regulator ...

Here is a 12 volt lead acid automatic battery charger that shut off the charging process once the battery attains full charge. This prevents overcharging of the battery so that, the charger can be ...