#Arduino Measure Battery Voltage Driver Circuits For

The LCD display.The battery voltage is measured from the TP1. It can be even used for measuring higher voltages. This can be used to measure battery voltage, sensor readings, etc.

In addition by adjusting the value of 1K resistor on Q1's base we can introduce current limiting in addition to acting as a power switch. Q1 is a PNP bipolar transistor. The idea is if the battery voltage drops below 12.6V turn on the charge current from the solar panel, turn off the current then wait, then measure again.A HIGH from DP2 switches on Q1/Q2. A value of Vin should return an ADC number of about 600 based on a 12.7 volt input. The Arduino ADC returns a 10-bit value from 0-1023 based on an input voltage of 0V-5V. Normally the battery/charge voltages range from 12V-14V.

See the following on various types of switching transistor circuits: Add a heat sink to Q1 if needed - other PNPs will work if they have sufficient collector current. Note in the video I was charging a 12-volt lead-acid sealed gel-cell type battery.This is for small applications and if trying to charge a 1000-watt battery bank buy a commercial unit.

Arduino Measure Battery Voltage Driver Circuits For

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/* SolarВ cellВ batteryВ charger/regulator */#defineВ CP 600 // charge point variable int val The above program will produce this out on the Arduino serial monitor.Also visit and subscribe to My YouTube ChannelI used this circuit to protect my solar panel charging system. You will have to add that to the following code. This prevents the small, but steady discharge of the battery. N-Channel Power MOSFET Switching TutorialThe above uses a transistor switching circuit to turn on the zener diode circuit to do a voltage measurement.