Build an Intelligent Battery Sorter to Recover Still-Usable AA/AAA Cells with Arduino Uno and Servo

Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.

Households across India discard batteries that still hold 70-80% usable charge simply because there’s no quick way to test them. This kit lets you build a desktop sorter that reads both voltage and internal resistance – the two numbers that actually decide whether a cell is worth keeping or truly spent. Drop a battery in the test cradle, and a precise servo arm pushes it into the Keep tray or the Recycle tray based on rules you program.

What You'll Build

You'll assemble a standalone sorting station controlled by an Arduino Uno. The ADS1115 16-bit ADC captures voltage and a pulsed load test calculates internal resistance. A 0.96-inch OLED displays real-time readings and the final decision. The SG90 servo then moves the battery into the correct bin. It’s a project that turns a messy drawer of loose cells into a categorised resource – and makes a strong case study for electronics or energy-management assignments.

What You'll Learn

• Using an ADS1115 ADC to read tiny voltage differences far beyond the Arduino’s built-in 10-bit resolution
• Designing a pulsed load circuit with an IRF540N MOSFET and 5-ohm resistors to measure internal resistance safely
• Controlling an SG90 servo based on conditional logic that combines voltage and resistance thresholds
• Integrating a 0.96-inch OLED display to show live measurements and sorting decisions

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

Designed for serious school and college makers: CBSE Class 11–12 students building physics or computer science projects, B.Tech ECE/EEE undergraduates working on measurement lab assignments, and participants in Smart India Hackathon or ATL Tinkering Lab challenges who need a working energy-monitoring prototype. The intermediate circuits and code push past beginner-level blinking LEDs into real instrumentation territory that IIT/NIT/VIT/BITS project panels appreciate.

Built and Backed by Compoden

Every Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.