How to Build an AI Wearable for Under $15 — Complete Step-by-Step Guide

How to Build an AI Wearable for Under $15 — Complete Step-by-Step Guide Imagine having a personal AI assistant on your wrist that can translate conversations in real time, answer health questions, or even help you write code—without needing a smartphone. This guide shows you how to build exactly that for under $15, using off‑the‑shelf parts and free software. Why Build Your Own AI Wearable? Commercial smartwatches lock you into their ecosystems. You can’t change the assistant’s behavior, add custom sensors, or see how the AI actually works. By building your own, you gain: Full control over the AI’s prompts and responses. Ability to attach any sensor—air quality, soil moisture, heart rate, etc. Hands‑on learning about APIs, wireless communication, and embedded programming. A functional prototype that costs less than a fancy coffee. The core idea is simple: an ESP32 microcontroller handles input (buttons, microphone, sensors) and talks to Claude’s API over Wi‑Fi. The answer appears on a