Comu
RISC-V board that fits in a USB port. Four touch buttons, two LEDs, and a CH32V203 you can program bare metal.
Best Hardware on X
Robots, Pi boxes, sensors and 3D-printed machines posted with photos or a build guide, not just a render. 54 builds on this page, each with the original post.
Project Caribou
Open source 220 kg heavy-lift hexacopter, built from off-the-shelf parts in 18 steps.
Sparky Command Center
A command center for a home AI lab: temps, watts, memory, and live throughput across Spark boxes and a 3090, plus a chat that reads the board. Open source Python.
shadow-garage
Software for silhouette plotters. Cut your own stickers. Opus 5.5, public repo.
PC-AXE
Hand-designed PCB, no AI. First-party hardware files on GitHub.
VIVE Face Tracking Bridge
Stream face and eye tracking from VIVE standalone headsets to VRCFT over Virtual Desktop and Steam Link.
LayerLift
Timelapses from 3D-printer slicer G-code. Filament, plate, lighting, and camera are yours to set. Files stay on device.
S3 PX4 Flight Controller
Open-source FPV flight controller. ESP32-S3, EasyEDA project and gerbers. Designed with Codex and GPT-6 Astra.
mt76-usb-macos
Userspace libusb driver for the Alfa AWUS036AXML. 6 GHz sniffer, monitor mode, and packet injection on MacBooks without a 6 GHz radio.
Button Box
A screen-free box so kids can send and receive WhatsApp voice notes. Open-sourced, with 3D-printable files.
NTRIP Client
Open-source NTRIP client in Python and C, for RTK correction data from a caster. First-party from Ardusimple.
Microduck on Isaac Lab
The open-source duck robot, ported to NVIDIA Isaac Lab so it can run a different physics stack.
Finite Systems
AI-native CAD in the browser. The author designed a physical coaster in it, then manufactured it.
Phasor Professional
AM radio antenna design software started in college in 1998. Still used. Source is public now.
omarchy-sparkdash
DGX Spark GPU, VRAM, temps, and tok/s in the Omarchy Linux top bar.
Microduck
25 cm open-source biped you train in sim and run on the real robot. $399, ships before Christmas.
RetroGameForge
Wi-Fi NES/SNES dev cart that stays in the console. Homebrew tools plus a new 8-bit game on Kickstarter.
cuda-metal
CUDA on Apple Silicon. Same kernels, rewritten to Metal. A 3D fluid sim that took 60s on CPU ran in 6s on the laptop GPU.
appletd
Realtime depth and landmark tracking on the M4 Pro GPU. Stable 60fps, inference stays on-device.
camsnap
USB webcam capture for agents, now with a rotation protocol so a claw can look around a 360 camera.
Pebble Phone Finder
Pebble watch app that tells you if you are getting closer to your lost Android phone.
tm20
Driver for a TM-20 thermal printer so ChatGPT can spit out whatever art it wants onto paper.
kimi-chip
RL harness that treats ASIC design as a hill-climb. RTL and GDS are public. Write-up at luoluo.ai.
sparktop
Dashboard for multi DGX Spark setups: inference throughput, GPU processes, and more.
Qwen3.8-27B NVFP4 on DGX Spark
Day-one Qwen3.8-27B deploy: NVFP4, 262K context, one DGX Spark, one command. Full reproducible stack.
Qwen3.8-27B FP8 on 2x 3090
27B on two consumer 3090s at ~75-85 tok/s with NVLink. Tool calling, reasoning, vision, MTP. Full deploy open-sourced.
gateto.space
Bid to beam your URL or X handle into space on a real LoRa radio and directional antenna.
handMediaPipeHands
85-line finger-tracking toy for Physical AI video cleanup. Claude Code plus MediaPipe.
Google Home MCP
MCP for Google Home, reversed from home.google.com. Keys stay on device.
SPIDriver Pico
RP2040 C port of James Bowman's SPIDriver. Built with DeepSeek V4 and Kimi K3.
Flutter-QNN
On-device LLMs in Flutter on Snapdragon. Gemma and Qwen via Qualcomm QNN, Hexagon NPU, local streaming.
ESP32 LED Matrix in Rust
Cheap 128×64 LED matrix driven by an ESP32. Rewrote the demo in Rust for more color depth and smoother animation than Python.
Local AI Box
A $2,300 local AI rig: two RTX 3090s for 48GB of VRAM, a dual-Xeon board and 28 cores, running 70B quantized models fully offline.
ESP32 Mesh Monitor
First hardware project: ESP32 mesh nodes with RTOS, MQTT scheduler, time sync and a web server to monitor anything.
Grok + Brain Sensing App
Grokathon project that lets people speak without using their mouth by combining brain-sensing tech with Grok Voice.
Inverted Lambda Teleoperation
Human-in-the-loop teleoperation infrastructure aimed at creating an open, distributed learning network for robots.
Waddle Labs – Claude Code for Robots
Connect Claude-style agent workflow directly to physical robots. Describe the task and the system writes the code to execute it in ~20 minutes.
$4,199 Claude Code Robot
Physical robot you can program directly with Claude Code or Codex to help with real-world tasks like working on cars.
Gemma Offline Translator
Fully offline portable translator running Gemma on a Raspberry Pi 5 inside a custom 3D-printed case.
ESP32 Fluidbox
3D fluid particle sim on a Waveshare ESP32-S3 AMOLED. Tilt the device, the liquid moves. Opus 5 wrote the C renderer. Repo is public.
OOMWOO – DIY Robot Vacuum
Fully open-source robot vacuum you build for about $200: Raspberry Pi, 2D LiDAR mapping, ROS2 navigation and native Home Assistant integration. No cloud.
M5Stack Real-time Pressure System
High-frequency real-time pressure sensing system built with M5Stack hardware and Grok Build.
DEF CON 34 Open Silicon Badge
This year's DEF CON badge runs open-source RISC-V silicon you can visually verify against the published RTL with an IR microscope. Doubles as a security key.
Xiaozhi – ESP32 Voice Assistant
Fully open-source framework that turns an $8 ESP32 into a real-time autonomous voice assistant with local wake-word detection.
28.9M Parameter AI on ESP32
Tiny open-source AI model running fully offline on a few-dollar ESP32-S3 chip at ~9.5 tokens/s. No cloud needed.
SeedTapper – Air-gapped Seed Engraver
Open-source air-gapped machine (Pi 5 + fiber laser) that engraves Bitcoin seed plates in titanium.
Threehalves – Centaur Rescue Robot
7-foot teleoperated centaur robot with a humanoid torso, quadruped base and quick-swap tool wrists, built for wildfires and disaster zones by a garage startup.
Axis Robotics Data Engine
Full Physical AI data collection and processing platform for training robots from simulation and egocentric video.
ESP-32 Zero-Latency Auto Aim
Custom local AI running on an $8 ESP-32 that tracks humans with zero computational delay.
Text-to-CAD
Open-source tool that turns plain English descriptions into production-ready CAD files (STEP, STL, URDF, etc.) for robotics and mechanical design.
ElRobot – Affordable Robot Arm
7+1 DOF fully 3D-printable robot arm that costs around $220, complete with CAD and build guide.
Open Source 3D-Printed AI Robot
Fully open-source expressive robot with object tracking and support for multiple AI models. STL + code released.
