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Building a modern interpretation of a polyphonic modular analog synthesizer at the transistor level, inspired by early 1970s-80s designs.
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Polyphonic Analog Synthesiser

charlie-theobaldCharlie Theobald

Dead Kurzweil SP4-7 converted into a self-contained synthesizer. Arduino Mega for key scanning, Raspberry Pi 5 + Zynthian for audio, custom
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I Turned a Broken Keyboard Into a Full DIY Synth

seileremersonseiler.emerson

A fully custom ESP32-based thermostat designed for 120V fan coil systems with dimmable OLED, HA integration, and a clean wall-mount design
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ESP32 Smart Thermostat for 120V Fan Coil System

mackswanmackswan

The ultimate open-source aquarium LED and mobile app.
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High-Power Smart WiFi Aquarium LED

li-weiLi Wei

An expandable 68000 based computer
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Y Ddraig - My 68000 Computer

stephen-moodyStephen Moody

Anyone can learn and play Piano with an ESP32 and some LEDs
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Pianethor

battiemmebattiemme

dumb le door (no more) is just a device i made in order to open my apartment's lobby door without the use of the ol' key
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dumbledoor

luis-sousaLuis Sousa

Annually, tens of thousands of drifting FAD buoys are deployed in the ocean. Let's upgrade them for cutting-edge marine research.
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Echo Sounder Buoys: Upcycling Playbook

brett-smithBrett Smith

What if you could run an entire automated greenhouse, a security network, and a heavyweight AI Edge Cluster without plugging into the wall?
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Springhouse

jeremiahJeremiah

Gamma spectrometer using scintillation crystal, Silicon Photomultiplier (SiPM), and all-digital FPGA signal processing
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Silicon Photomultiplier Gamma Spectrometer

robert-gawronRobert Gawron

Some very simple PCBs to make it easier to work with Kailh MX or Choc hotswap sockets
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Snowshoe Single Keyswitch Hotswap Boards

david-h-bronkeDavid H. Bronke

The best Open-Source quadruped robot for learning AI and robotics.
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TNY-360: High-Speed Closed-Loop Quadruped Platform

paul-loisilPaul LOISIL

A retrosystem based on the elegant 8/16 bit 6809 processor capable of running UniFLEX and OS9 level II multiuser/multitasking OS
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6809/6309 Eurocard CPU System

roelof4roelof4

Legend has it: More Screens = More Skill
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Duo Monitor Steam Deck

waterloggedWaterLogged

Systematically quantifying sleep behavior by capturing and analyzing how body weight is distributed across a sleeping surface over time.
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Quantifying Sleep Positions With Body Weight

bret-bernhoftBret Bernhoft

A modular electronics platform for programmable logic controller and other applications
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Modular Interface Exchange (ModIX) System

benny-cheungBenny Cheung

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