Leaderboard category

Homebrew hardware

One-off, modified, and builder-made hardware, ranked by the community. A fresh competitive board starts every Monday.

Ranking window

#01

Angle-Sensing Knife

A knife-mounted angle sensor tracks each cut so repeated wedges can assemble into a precise arch.

#02

A homemade payload launches inside a model rocket, separates near apogee, and attempts a guided landing.

#03

A four-cable ceiling robot moves a lightweight gripper around a room to collect laundry, toys, and clutter.

#04

A handmade desktop digital pet with an OLED face and companion status app, developed with an AI coding assistant.

#05

A sensor-filled tennis ball that triggers grunts from a Bluetooth speaker whenever it is hit.

#06

Jean shorts with built-in thermoelectric cooling pockets, built to keep ice cream sandwiches frozen on summer bike rides.

A pocket-size LCD module running a generative animation where spheres connect and react to proximity and touch.

A handheld DIY camera built on an ESP32-CAM, taken out for twilight street shooting.

#09

A snack safe that only unlocks after you walk a set number of steps, making you earn what's inside.

A handmade screen-and-joystick glitch camera taken through central São Paulo for experimental street photography.

#11

Wearable smart glasses that use computer vision and a transparent OLED to turn face detection into a playful flirting aid.

#12

An ESP32 taps a car's ECU and turns live vehicle data into a row of dashboard displays.

#13

An open-source Raspberry Pi appliance that runs Google Gemma locally for fully offline speech translation.

#14

A felt crown whose LEDs are sewn into a beginner-friendly soft circuit with conductive thread and a battery.

A compact 3D-printed cyberdeck with built-in screen and keyboard, tested as a full laptop replacement for a day.