The series of resistors connected at the inverting terminals of each op amp makes a voltage divider and exact comparing voltage is supplied to each op amp. Comparison is done between the two terminals of each op amp and accordingly output is shown. So 6 op amps are used to compare and display the appropriate level of voltage. Buy ECO-Worthy 200A Battery Monitor, Easy DIY with Hall Sensor, 0-100V Battery Meter with Program, Auto Detection,for 12V/24V/36V/48V Li-ion/LiFePO4/AGM/Gel. Here for the development of the circuit, the 12V to 9V range is divided into 6 parts as 9V, 9.5V, 10V…11.5V. A relay Electromechanical relay schematic showing a control coil, four pairs of normally open and one pair of normally closed contacts An automotive-style. My point to say all these is that to monitor a 12V battery, it is sufficient to monitor the battery voltage from 12V to 9V range and a voltage below 9V should give a warning for LOW BATTERY VOLTAGE. Battery Monitor Circuit Working Explanation The circuit is easy to build, it uses variable resistors, LEDs and diode, capacitor, and IC LM3914 which is the main component of the circuit. Any inverter designed to use with a 12V battery should be comfortable to produce a constant AC output voltage during the fall of battery voltage from 12V to 9v approximately. So it is generally considered that if the output voltage of a 12V battery changes from 12V to 9V approximately, it is constant and after the voltage falls below 9V, it is considered to be discharged and need to be charged again. Practically, it is not possible and the output voltage of the battery decreases gradually as load connected to it draws current from it. We can make a very simple battery monitor using a dual-colour LED and a few. Generally a 12V battery is expected to produce a 12V dc voltage all the time until it gets discharged. A battery threshold indicator circuit shown in the schematic diagram below.
0 Comments
Leave a Reply. |