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UV irradiation system for enhanced photo-activation in living cells
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UVEN mk3

simon-trendelSimon Trendel

12-Element Yagi Antenna – 3D-printed element mounts on a 2 m aluminum boom, gain ≈ 12 dBi
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YaGi Antenna for PMR446

bertrand-selvaBertrand Selva

3D-printed Raspberry Pi TV that plays curated clips via a local Flask backend for full offline content control.
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Retro Raspberry Pi TV Brings Back Channel Surfing

ricardo-sappiaRicardo Sappia

Handheld LiDAR device with sliding lever haptic feedback. Helps newly blind users build spatial confidence. Open-source, Pi5 >> ESP32
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FeelBeam: Haptic Distance Navigator

vasilii-belykhVasilii Belykh

Hexaphonic guitar puckup built from 6 unmodified relays and amplifiers
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Relay as a magnetic guitar pickup

kauzKauz

Cerberus is my extension of USBvalve. Built on a Raspberry Pi Pico, it detects malicious USB devices to stop them before they reach the host
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Cerberus — A USB Watchdog

glitchboiGlitchboi

It monitors the soil humidity of each potted plant, if the humidity is too low, the pump automatically starts to spray
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Arduino Automatic Watering System for Plants Sprin

bella802Bella802

ESC{21} conference badge made with clear PET and loaded with LEDs
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Fully Transparent Folded Cube Badge

jacopopsjacopops

A "Jukebox Brain" for PPC-era Macs inspired by old-school jukeboxes!
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WurliMac

davidDavid

An interactive badge for the Seattle GNU/Linux Conference with live hashtag updates for the event.
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SeaGL 2025 Badge (Unofficial)

johnsonfarmsusJohnsonFarms.us

Mistreating an LM3909 and a 7473 to test diodes - a recreation of a 40 year old device.
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The IC abusing diode tester

joseph-eoffJoseph Eoff

The aim of this project is to make high grade DIY or turnkey AFM.
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Atomic Force Microscope - from ground up

100dollarhacker100dollarhacker

Hint: You likely have one in your spare parts bin
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Need an Electrical Slip Ring?

luke-j-barkerLuke J. Barker

WingFC is an open-source, TinyGo-based embedded flight controller for sub-250g fixed-wing aircraft with elevons.
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WingFC

bryan-souzaBryan Souza

Reverse-biased LEDs repurposed as photodiodes measure ambient light flux with an RP2040 core, OLED readout, and precision analog front-end.
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Photon Flux Analyzer v2 — Reverse-Bias LED Sensor

zazie-kanwar-torgeZazie Kanwar-Torge

Late nights get lonely, so I built Operation Pinocchio—turning my AI skeleton cohost Little Timmy into a real, local, talking robot.
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Conversational, Local, AI Companion

gearscodeandfiregearscodeandfire