🔋 Battery Capacity Indicator – Real-Time Power Monitoring for DIY Electronics
The Battery Capacity Indicator provides intuitive battery health visualization with an 8-level LED interface, eliminating guesswork in portable and embedded projects. Designed for Arduino, Raspberry Pi, and IoT systems, it offers plug-and-play simplicity, low power consumption, and adaptive brightness control—perfect for power banks, solar trackers, robotics, and STEM kits.
🔑 Functional Highlights
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⚡ Plug-and-Play: Connect directly via V+/GND pins, no calibration required.
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🔋 Low Power: <5mA typical draw extends battery life.
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🌈 Adaptive Brightness: Adjustable LED intensity for indoor/outdoor use.
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📐 Voltage Agnostic: Supports 3.7V Li-ion to 12V Pb-acid systems.
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🖥 LED Bar Graph: 10-segment display with 8 brightness levels.
📊 Specifications
| Parameter | Value |
|---|---|
| Operating Voltage | 3.3V–5.5V (±5%) |
| Brightness Levels | 8 (adjustable via PWM/resistor) |
| Dimensions | 42 × 24 × 8 mm (1.65 × 0.94 × 0.31") |
| Current Draw | |
| Compatibility | 1S–4S Li-ion/Polymer, 12V Lead Acid |
| Display Type | LED Bar Graph (10-segment) |
🎯 Applications
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Portable Power Banks: Visualize remaining charge.
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Solar Trackers: Monitor battery health in off-grid sensors.
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Robotics: Real-time voltage alerts for safe operation.
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STEM Kits: Teach energy management concepts interactively.
⚠️ Usage Tip: For multi-cell batteries (e.g., 3S Li-ion), add a voltage divider to scale input within 3.3V–5.5V range.
📦 Package Contents
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1 × Battery Capacity Indicator (42 × 24 × 8 mm) (Mounting hardware/cables not included)