Summary of 12V Lead Acid Battery Voltage Monitor
This project is a 12V Lead Acid Battery Monitor that visually displays battery voltage using 10 LEDs driven by the LM3914 IC. It operates directly from the battery without a separate power supply and features selectable bar or dot display modes via a jumper. The circuit offers adjustable voltage ranges, low current consumption, and includes mounting holes for installation.
Parts used in the 12V Lead Acid Battery Monitor:
- LM3914 IC
- 10 Light Emitting Diodes (LEDs)
- Onboard preset for range selection
- Jumper for mode selection
- Header connector for power/voltage input
- PCB with four 3.2 mm mounting holes
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
For more detail: 12V Lead Acid Battery Voltage Monitor
- How does the device display battery voltage?
It uses 10 LEDs driven by the LM3914 IC to show voltage levels visually. - Does this project require a separate power supply?
No, the circuit works on the same battery it monitors. - What are the two display types available?
The device supports Bar graph and Dot modes selectable by a jumper. - Can the voltage range be adjusted?
Yes, the maximum and minimum range is selectable with an onboard preset. - What is the typical current consumption of the circuit?
The typical current consumption is 100 mA. - What is the maximum supply input voltage?
The maximum supply input is 15 VDC. - How many mounting holes does the PCB have?
The PCB has four mounting holes, each 3.2 mm in size. - Which IC is used as the core component of this project?
The popular LM3914 IC from Texas Instruments is used.
