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12V Lead Acid Battery Voltage Monitor
- Rajkumar Sharma
- 21.217 Views
- moderate
- Tested
- SKU: EL38072
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This project is a 12V Lead Acid Battery Voltage Monitor
Description
12V Lead Acid Battery Monitor is a simple project which tells you the voltage of your Lead acid battery visually with the help of 10 LED’s. This project is based on the popular LM3914 IC from Texas Instruments.
The LM3914 senses the voltage level at the input pin and drives the 10 light emitting diodes based on the voltage detected on input connector. Circuit works on same battery, doesnt not require separate supply input. Jumper is used to select the DOT mode or bar graph mode.
Specifications
- Supply input 15 VDC Max
- Maximum and Minimum range selectable with onboard preset
- Output 10 LED’s
- 2 Types of display Bar and Dot selectable by a jumper
- Very low current consumption, typical 100 mA
- Header connector for connecting power / voltage in
- Four mounting holes of 3.2 mm each
- PCB dimensions 37 mm x 75 mm
Schematic
Parts
Configuration
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very nice thanks
Where is + – battery conecting cable
You connect the battery to CN1 and the LEDs indicate the battery voltage. In other words it’s self powered from the measuring voltage, no need for additional power.
Can i use it for the invertor battery that we use in our homes?
What kind of battery do you mean? Is it a 12V battery?
Hello can i modify it to 6v acid batt. ?
Sorry, this is only for 12V batteries.
Where is The Input From Charger Sir?
There is no input for charger, you just connect a 12V lead acid battery to the input to check it’s charge state.
Dear Sir , How to place a battry charger connector plz.