Getting started

What to do if you don’t have all the parts listed

Swap close equivalents, keep power and ground, and do not wait for a kit that is not on sale yet.

The problem

The parts list names a colour sensor, two micro servos, or a specific motor driver, and your drawer has something nearby but not the same.

Equivalent part: A different brand or shape that does the same job at the same voltage. An SG90 micro servo can replace another SG90-class servo. A 3.3V-only sensor is not an equivalent for a 5V analog sensor without extra care.

1
Physical Overhaul kits are not for sale yet. You are expected to use your own parts or a school cupboard. That is current status, not a temporary footnote.
2
Servos: any 5V micro servo with three wires (brown/black GND, red 5V, orange/yellow signal) can stand in. Keep the signal pin in the code the same as the diagram.
3
Motors: two similar DC motors are fine for a line follower or fan. If you have no motor driver and the code writes analogWrite to a pin, a tiny motor may run from that pin for a demo, but it can overheat the board. Prefer a driver module, or run the motor briefly.
4
Sensors: an IR reflectance sensor can replace “colour or IR” on the recycling sorter for a light-vs-dark split. A colour sensor is only required if you need hue. An LDR (light-dependent resistor) can replace another LDR. Do not replace a servo with an LED and expect motion.
5
If you skip a listed part, tell the copilot what you actually have and regenerate. Do not silently omit a wire; the generated code still talks to that pin.

If you walked the steps and the mechanism still does not move, write to us. This is the fallback, not the first stop.