Posted by Circuits Arena on Thursday, 15 February 2018
How to Make Battery Voltage Monitor Circuit Diagram On Your Own is the artlcle explaining Battery Voltage Monitor This article is aimed at all those electronics enthusiasts who like to play with the basic components of electro...
Battery Voltage Monitor
This article is aimed at all those electronics enthusiasts who like to play with the basic components of electronics that are widely available
This electronic project is used to monitor the charging and discharging of the battery so that the battery voltage does not exceed the specified level of this battery. It basically acts like a controlled charger. It shows the condition of the battery.
Circuit Connections
The battery voltage monitor circuit is implemented using an operational amplifier IC (LM709) that is used as a comparator. Here, a two-color LED is used to indicate the state of the battery. A combination of a resistor and a potentiometer is used as a potential divider.
The voltage in this potential splitter is supplied to the inverter input pin of the comparator. Resistor R3 and R4 is used as the LED current limiter.
Circuit Diagram
Circuit Operation
The Battery Voltage Monitor Circuit is powered by the 12V battery. When the voltage level of the battery increases up to 13.5 volts, the voltage at the inverting input is less than the voltage at the non-inverting input and the output of the OP-AMP goes low. LED1 begins to emit red light which indicates that battery is overcharged.
When the voltage level of the battery falls to 10volts, the voltage at the inverting terminal is less than the voltage at the non-inverting terminal. The OPAMP output goes high. LED2 begins to emit GREEN light which indicates that the battery needs to be charged.
