LM3914 10 Segment 3.7V Lithium 12V Battery Capacity Indicator Module Power Level Tester LED Display Electronic DIY Kits

LM3914 10‑Segment Battery Capacity Indicator – 3.7V Lithium / 12V Power Level Tester

Accurately monitor the remaining charge of your 3.7 V lithium cells or 12 V batteries with this compact LM3914 LED display module. Designed for hobbyists, makers, and professionals, the kit provides a clear visual read‑out of voltage levels, helping you prevent unexpected power loss and extend the life of your rechargeable batteries.

Key Highlights

• 10‑segment LED bar graph driven by the LM3914 driver IC for precise voltage indication.
• Supports both 3.7 V lithium‑ion/polymer cells and 12 V lead‑acid or Li‑Fe batteries.
• Easy‑to‑wire DIY kit – includes LM3914 board, resistors, connectors, and a detailed assembly guide.
• Low power consumption; ideal for portable projects and battery‑powered devices.
• Wide operating temperature range (‑20 °C to +85 °C) for reliable performance in any environment.
• Compact footprint (45 mm × 30 mm) fits easily into enclosures, RC models, solar chargers, and more.

Technical Specifications

• Driver IC: LM3914 (10‑LED bar‑graph driver)
• Input Voltage Range: 2.5 V – 15 V (adjustable via external resistor network)
• LED Type: 10 × high‑brightness 5 mm red LEDs (optional color variants available)
• Current per LED: 10 mA (adjustable)
• Power Supply: 5 V – 12 V DC (USB or battery source)
• Dimensions: 45 mm × 30 mm × 12 mm
• Operating Temperature: –20 °C to +85 °C
• Connector Type: 2‑pin JST PH for easy battery hookup

Ideal Applications

• Portable electronics and DIY power banks
• RC vehicles, drones, and hobby‑grade battery packs
• Solar charge controllers and off‑grid energy systems
• Educational projects and electronics training kits
• Prototype development for wearable and IoT devices

Why Choose This LM3914 Module?

With its reliable LM3914 driver and straightforward assembly, this battery capacity indicator delivers accurate, real‑time voltage feedback without the need for complex programming. Whether you’re building a custom power monitor, upgrading a remote‑control vehicle, or teaching students about analog circuitry, this kit provides the perfect blend of functionality, durability, and cost‑effectiveness.

Order now and gain instant visual insight into your battery health—protect your projects, avoid downtime, and enjoy the confidence that comes with precise power monitoring.