All episodes

One part per episode.

Each build is centered on a single off-the-shelf part. Click through for the video, the bare-minimum you need to know, and every file to build it yourself.

EP #1

The $3 Brain

ESP32

The tiny single-core RISC-V brain with Wi-Fi + BLE that runs almost every mini robot.

CodeWiringParts
EP #2

The Metal-Gear Servo

MG90S

Precise motion for joints and legs — plus a fully 3D-printable pan-tilt head.

Code3D filesParts
EP #3

The Motor Driver

DRV8833

The $2 H-bridge that lets your tiny brain command big, hungry motors.

CodeWiringParts
EP #4

The Gear Motor

N20

The thumb-sized powerhouse behind almost every wheeled bot.

CodeWiringParts
EP #5

Give Your Robot a Personality

LED + BUZZER

The two cheapest parts on the channel — an LED and a piezo buzzer, under a dollar combined.

Code3D filesCheat sheetWiring
EP #6 · in the works

The First Build

ROVER

Brain, driver, two motors — eleven wires and they become one complete, driving robot.

CodeCheat sheetWiring
EP #7 · in the works

Batteries + Boost

POWER

One lithium cell and a $1 boost converter — a steady 5V rail, and no more USB leash.

Cheat sheetWiringParts
EP #8 · in the works

The Laser Eye

VL53L0X

A $2 laser rangefinder over I2C — and a rover that sees the wall before it hits it.

CodeCheat sheetWiring