Battery Level Indicator using LM3914

A Battery level indicator (Battery Guage) is an electronic measuring instrument that indicates the immediate voltage level of any DC battery. It is a very common testing circuit, employed in various industries. So today, we are going to build a Battery Level indicator using the LM3914N dot/bar display driver IC.

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Hardware Required

You will need the following parts to build this project

• 1x LM3914 LED Driver IC.
• 10x RED LEDs
• 10K Pot
• Resistors (1K, 4.7K, 18K)
• 12V/9V/3V DC Power Supply
• Battery Clips
• Breadboard
• Connecting Wires

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Steps

Step1 Solder IC with Base

Step2 Solder LED’s

Step 3 Solder Resistors

Step 4 Solder Variable Resistor

Step 5 Solder Battery Terminals

LM3914 Pinout