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Builder story

Demo story

A robot from spare parts

An illustrative builder story about learning hardware one sensor at a time. (Demo story.)

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Spark Academy Editorial

4 Sept 2026 · 5 min read

This is an illustrative demo story, written to show how builder stories will look on Spark Academy.

Rohan wanted a small robot that could follow a line on the floor. He had a microcontroller, two motors and a lot of questions.

Sensors first

He learned to read a sensor before he tried to drive a motor. Every step was tested separately.

Failing usefully

The first version spun in circles. The fix was a simple feedback loop, the same idea taught in the robotics course.

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A robot from spare parts · Spark Academy