Power Supply Circuits

Car Battery Monitor circuit description: This is a circuit diagram of the 3 LED bar graph type battery monitor ideal for monitoring the voltage […]

12Vdc mobile battery charger circuit diagram can delivers up to 20 V output from the 12V car power supply, allowing a constant current charging […]

This is a car nicd battery charger circuit that can charge any Ni-Cd battery between 4.8 and 4.4 volts from a classic 12 Volts car battery. The charging current is constant it can be selected from the values ​​of 50 to 120 mA by the selector S.

The solar battery charger circuit is nothing but a dual comparator that connects the solar panel to the battery when the voltage at the latter terminal is low and disconnected if exceeding a certain threshold. Since it is only by measuring the battery voltage, it […]

Here is a simple battery monitor circuit in which the LED will continue flashing until battery voltage is above the level. Transistors Q1 and Q2 are wired as an astable multivibrator circuit. This flashing battery monitor circuit can operate from a variety of voltages from 6V to12V.

Description of the 12V battery charger electronic scheme : Below is a very simple circuit that can be used to charge 12v car battery. In this circuit there is installations to control the charging current and voltage. The circuit is based on the circuit MC78T12ABT IC from […]

Description of battery charger indicator: The circuit above will make your simple battery charger look sophisticated. This circuit is a charging indicator for battery charger. Its used to check whether the battery is charging or not.  Voltage comparator LM393 IC is the heart of this  Battery charger […]