MCU Atlas

Small builds for when the power goes out. ESP32 and LoRa projects with full parts lists, written for beginners. Follow so you don't miss the next one. 🔦

[MCU Atlas @MCUAtlas]

The UK's Be Ready campaign asks homes to be ready for 3 days, noting severe weather can hit power, phones and the internet. 📻

Trail Mate turns a LilyGO T-Lora Pager or T-Deck into an offline handheld: Meshtastic or MeshCore chat and offline maps. No phone needed.

By vicliu624

[MCU Atlas @MCUAtlas]

Which version to use, flashing, assembling the shield and the $ settings:
https://t.co/rI18A8ydMS

[MCU Atlas @MCUAtlas]

The firmware behind many hobby CNC machines 🛠️

grbl runs on an Arduino Uno with a CNC shield, reads G-code over serial and drives three axes. A build tip: from v0.9 the Z-limit and spindle-enable pins swapped, so old wiring guides are wrong.

By grbl

[MCU Atlas @MCUAtlas]

The ready-made board vs. a DIY build (ESP32, ILI9341 TFT, LiPo), where the firmware and wiki live, and the own-gear-only rule:
https://t.co/WPu9TVJIwQ

[MCU Atlas @MCUAtlas]

A security-research toolkit for your own Wi-Fi and Bluetooth 🛡️📶

ESP32 Marauder is a suite of Wi-Fi and Bluetooth tools for the ESP32. Buy a ready-made board or build your own.

Only for networks and gear you own or have permission to test.

By justcallmekoko

[MCU Atlas @MCUAtlas]

Printing the frame, wiring the electronics and tuning the PID:
https://t.co/gjBXNmk1e2

[MCU Atlas @MCUAtlas]

The classic balancing-robot recipe on an ESP32 🤖

An MPU6050 measures tilt, a PID loop works out the correction and two steppers on DRV8825 drivers keep it upright, in a 3D-printed frame. An older repo, best read as a reference build.

By trandi

[MCU Atlas @MCUAtlas]

Getting a DVI output, building with the Pico SDK and flashing:
https://t.co/4U4yjQNkSf

[MCU Atlas @MCUAtlas]

HDMI video from a Raspberry Pi Pico 🖥️

PicoDVI bit-bangs a DVI signal with the RP2040's PIO, driving a monitor through a simple resistor network or a DVI Sock. Demos include a text terminal and a bouncing cube.

By Wren6991

[MCU Atlas @MCUAtlas]

Which board version to pick, installing it and staying legal:
https://t.co/OHevMI0x8r

[MCU Atlas @MCUAtlas]

A LoRa chip, turned into a handheld radio scanner 📡

LakeShark uses an undocumented LR2021 ROM command to pull raw I/Q from the LoRa chip on the LilyGO T-Display P4 (LR2021 version), then decodes FM/AM, POCSAG, ADS-B, P25 voice and MeshCore.

By SAMS0N1TE

[MCU Atlas @MCUAtlas]

A soil sensor that wakes for less than a second 🌱🔋
One ESP32-S3 and a single 18650 cell: the node wakes for 0.8 s, reports soil moisture, battery voltage and Wi-Fi signal to your own MQTT broker, then sleeps. The maker estimates about 1.5 years per charge.

By Sezgin Bilketay

[MCU Atlas @MCUAtlas]

Parts, breadboard vs. the repo's KiCad PCB, the persona gallery (Ada Lovelace to Daffy Duck) and why you need your own OpenAI API key:
https://t.co/g5UznWrhrA

[MCU Atlas @MCUAtlas]

A voice assistant with no personality until you write one 🎙️

VA5 is a push-to-talk ESP32-S3 build with a round animated face. From your phone, write its persona, pick its voice and language, and swap in your own face. No reflashing.

Born in classrooms.

By iollama

[MCU Atlas @MCUAtlas]

The resistor DAC, checks before power-up, wiring the display and tuning:
https://t.co/xnNbfAekck

[MCU Atlas @MCUAtlas]

Analog FPV video from one XIAO ESP32-C5 and seven resistors 🛸

C5VRX receives 5.8 GHz drone video with the ESP32-C5's own Wi-Fi radio and outputs composite video for goggles or any AV monitor. Flash it from the browser.

By Twotoz

[Seeed Studio @seeedstudio]

🦾reBot Arm T701🦾 — An #opensource dual-arm solution for #PhysicalAI, currently in Beta.

We’re continuing to open up CAD, BOM, machining files, SDK, and tutorials.We believe open source isn’t just uploading a few files to GitHub.

It’s about letting others build on your work and keep moving forward.

⭐️reBot Arm T701
https://t.co/odCVM16m9L

👉Also check reBot B601
https://t.co/q97cYsNF1W

📚 Free robotics learning hub
https://t.co/AvzoVTjI24

If you’re working on embodied AI, LeRobot, imitation learning, or dual-arm systems — drop a Star and join us.

#EmbodiedAI #Robotics #LeRobot #reBot #SeeedStudio

[MCU Atlas @MCUAtlas]

Generating a key, building with Zephyr and tracking it:
https://t.co/lBmjN0nb1X

[MCU Atlas @MCUAtlas]

Your own Find My tracker on an nRF52840 🎒

This port of OpenHaystack to Zephyr lets an nRF52840 board advertise as an Apple Find My accessory, so it shows up on the crowdsourced network. Low enough power for a coin cell. Only track your own things.

By koenvervloesem

[MCU Atlas @MCUAtlas]

The boards the author tested, the web-app setup, and the limits up front (one public channel, no DMs, not end-to-end encrypted):
https://t.co/kPgMnE485f

[MCU Atlas @MCUAtlas]

Bitchat phone chats, carried kilometers over LoRa 📡💬

Bitchat needs no internet, but Bluetooth only reaches people nearby. MeshCore-BitChat turns a cheap ESP32 LoRa board into a bridge to a MeshCore mesh, both ways. Flash a release binary, set region and name.

By jooray