![]() When you turn on the circuit, it starts with LED test, where the LEDs glow up sequentially with some delay. The calibration for this Arduino 6 LED battery level indicator circuit must be done carefully, if you did not calibrate correctly, the circuit will show incorrect voltage level of the battery. ![]() -Program developed by R.Girish-// How to Setup the circuit: The relation between LED and battery level is given below: The series of 6 LEDs will indicate the battery level. A pre-set resistor is used to calibrate the above setup. The circuit consists of Arduino which is the brain of the system, a potential divider which helps the Arduino to sample the input voltage. If your battery is full, the left most LED glows and you battery is dead or about to die, the right most LED glows. The circuit has 6 LEDs, one LED glow at a time to indicate the voltage level of the battery. ![]() When this circuit indicates low battery, you may put the battery to charge. The proposed battery charger circuit will show you how much energy left in the battery, this circuit may be connected to battery, while you prototyping your circuits. Since we concentrate on the prototype during experiment, we care less on the battery. ![]() All batteries have certain voltage limit to discharge, if it goes beyond the prescribed limit, the life span of the battery will reduce drastically.īeing electronics enthusiasts, we all might have a battery for testing our prototype circuits. ![]()
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