Build a Precision Drag Force Tester and Calculate Drag Coefficients with Arduino Uno

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

When a sleek sports car slices through the wind, its shape is the result of thousands of drag force tests. With this kit, you build a miniature aerodynamic test stand that uses a precision load cell to measure the force of moving air on different model shapes, then computes their drag coefficient — exactly like an automotive engineer validating a design.

What You'll Build

You’ll assemble an Arduino Uno data acquisition system that reads the minute force from a 1kg load cell through an HX711 amplifier, timestamps every measurement with a DS3231 real-time clock, and stores readings on a microSD card. Live drag force data appears on a 16x2 LCD. Drop a 3D-printed cone, sphere, or flat plate into an airstream and watch how shape dramatically alters the number.

What You'll Learn

• Calibrating a 1kg load cell with the HX711 amplifier for sub-gram force resolution
• Interfacing an I2C 16x2 LCD backpack to display real-time sensor values
• Logging time-stamped drag data to a microSD module using an Arduino Uno
• Calculating drag coefficient (Cd) from measured force, air velocity, and frontal area

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

Designed for CBSE Class 11–12 students working on physics investigatory projects in fluid dynamics, and first-year B.Tech ECE/EEE students learning sensor integration. Ideal for ATL Tinkering Labs, school science exhibitions, and Smart India Hackathon prototypes that need quick aerodynamic validation. Even IIT, NIT, VIT, and BITS Pilani students use it to prototype drag measurement rigs.

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.