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MCU Atlas
54 projects and counting

What can you build with a microcontroller?

Discover real projects built with ESP32, Raspberry Pi, Arduino, and more. Complete with parts lists, source code, and where to buy.

Browse ProjectsStart with ESP32
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Featured Projects

Hand-picked builds from the community

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Watchy: open-source ESP32 e-ink smartwatch
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ESP32
Watchy: open-source ESP32 e-ink smartwatch
An open-source smartwatch with a 1.54in e-paper screen and ESP32, hackable watch faces in Arduino.
Beginner·Under $15·Code
2 parts listed
Low-power ESP32 e-paper weather display (7.5in)
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ESP32
Low-power ESP32 e-paper weather display (7.5in)
A wall-mounted 7.5in e-paper weather display on an ESP32 that runs for months on one battery charge.
Intermediate·Cost varies·Code
5 parts listed
OpenEPaperLink: reuse e-ink shelf labels with an ESP32 access point
Illustration
ESP32ESP32-S3
OpenEPaperLink: reuse e-ink shelf labels with an ESP32 access point
Turns cheap second-hand electronic shelf labels into a Wi-Fi-managed e-ink display fleet via an ESP32 access point.
Advanced·Under $15·Code
3 parts listed
Cheap Yellow Display: community hub for the ESP32-2432S028 touchscreen
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ESP32
Cheap Yellow Display: community hub for the ESP32-2432S028 touchscreen
A community guide, pinouts and examples for the ~$15 ESP32 board with a built-in 2.8in resistive touchscreen.
Beginner·Cost varies·Code
2 parts listed
ESPHome wake-word voice assistants for Home Assistant
Illustration
ESP32ESP32-S3
ESPHome wake-word voice assistants for Home Assistant
Official ESPHome configs that turn ESP32-S3 boxes into local wake-word voice satellites for Home Assistant Assist.
Beginner·Cost varies·Code
3 parts listed
WLED: Wi-Fi control for addressable LED strips on ESP32
Illustration
ESP32
WLED: Wi-Fi control for addressable LED strips on ESP32
The go-to firmware for controlling WS2812B and similar LED strips from a phone, with 100+ effects and Home Assistant support.
Beginner·Cost varies·Code
3 parts listed
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Explore by Board

Find projects for your favorite microcontroller

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ESP32

34 projects

Espressif's versatile Wi-Fi and Bluetooth microcontrollers, from the original ESP32 to the latest ESP32-P4. The most popular choice for IoT and maker projects.

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Raspberry Pi

5 projects

Full Linux single-board computers from the Raspberry Pi Foundation. From the powerful Pi 5 to the compact Pi Zero, ideal for projects needing a full OS.

Raspberry Pi Pico illustration

Raspberry Pi Pico

6 projects

Raspberry Pi's RP2040 and RP2350 microcontroller boards. Low-cost, high-performance, with excellent documentation and the unique PIO feature.

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Arduino

4 projects

The original maker platform. From the classic Uno to the powerful Portenta, with the most beginner-friendly ecosystem and extensive library support.

STM32 illustration

STM32

4 projects

STMicroelectronics' ARM Cortex-M microcontrollers. From the budget F1 'Blue Pill' to high-performance H7 series, popular in professional and hobbyist projects.

Nordic nRF52 illustration

Nordic nRF52

5 projects

Nordic Semiconductor's low-power Bluetooth microcontrollers. The gold standard for BLE projects, wearables, and battery-powered devices.

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Wearables & Portable(6)Robotics & Motion(6)Networking & Connectivity(4)Edge AI / TinyML(2)Home Automation(1)Audio & Voice(1)Camera & Vision(1)

Which ESP32 Should I Buy?

A guide to choosing the right ESP32 variant for your project.

Parts Catalog

Browse boards, sensors, and displays with verified buy links.

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