LM3914 Battery Tester LED Display for DIY Projects

• High Precision LM3914 Analog Voltage Detection: Get accurate insights into your battery’s remaining power.

• Adjustable Power Display Range: Customize the display range to suit different battery types.

• Clear LED Indicator Lights: Easy-to-read display at a glance.

• Wide Compatibility: Works with lithium batteries, lead-acid batteries, and more.

• User-Friendly Design: Simple to set up and operate for all experience levels.

1. Ensure correct polarity when connecting the module. The side with the words on the Nixie tube is the positive plate.

2. Follow these steps for accurate voltage adjustment:
   
   

   • High-End Voltage Adjustment: Connect to the upper limit voltage. If no lights are on, turn clockwise. If all lights are on, turn counterclockwise until only one or all lights are lit.

   • Low-End Voltage Adjustment: Connect to the lower limit voltage. If no lights are on, turn counterclockwise. If several lights are on, turn clockwise until only one or no lights are lit.

3. Repeat the adjustment sequence multiple times for precise calibration.

• Provides a quick and reliable way to test battery levels for projects involving power supplies and portable devices.

• Simplifies troubleshooting and ensures batteries are in optimal condition.

• Enhances understanding of power systems for electronics students and hobbyists.

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This module combines technology and practicality, making it an essential tool for dynamic DIY enthusiasts. Its compact size and low power consumption make it perfect for integration into various electronics projects. 

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The LM3914 Battery Tester LED Display PCB is an excellent choice for DIY electronics enthusiasts and hobbyists. This compact PCB, measuring 49.0mm by 25.9mm, is designed for assembling a battery testing module that visually displays voltage levels using LEDs. The PCB supports the integration of the LM3914 IC, a highly versatile dot/bar display driver, allowing you to easily monitor the charge status of batteries with precision. It includes slots for variable resistors (RW1 and RW2) for fine-tuning, a 3K resistor, and clear markings for easy component placement. Perfect for learning or creating custom battery testers, this project is ideal for students and engineers keen on building practical electronics applications.