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Figure out how to reliably control a Holtek HT9290A or HT9290B "One-Key DTMF dialer" with a microcontroller, buspirate, etc.
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Control a obsolete Holtek HT9290A/B DTMF dialer

mike-gMike G

Plastic case with passive ventilation and Dupont cable management system for the popular Raspberry Pi Pico W devboard released in 2022
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ICL_RPIPW_ST_V1 plastic case for Raspberry Pi Pico

iot-case-labIoT Case Lab

A deep dive into 8 bit architecture with the Z80.
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A Z80 Journey

twodogstartwodogstar

Add spoken feedback to any Arduino project by sending text and sensor values to a TinyTTS module over UART — no cloud, no audio files.
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Offline Talking Sensor with Arduino and TinyTTS

paulPaul

HackyPi 2.0 is a smart, AI-enabled multi-tool with automation, BadUSB, HID, child safety, crypto, and a beginner-friendly no-code UI.
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HackyPi 2.0 — New Gen Hacking Tool

sb-componentsSB Components

Jade is not just another DOOM engine, because right now, JADE doesn't even play DOOM. But maybe someday, it will on an FPGA or "NOR machine"
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JADE: Not Just Another DOOM Engine

glgormanglgorman

Experiences building Sergey Kiselev's Z80 based Zeta SBC V2 SBC about 10 years after V2 was released.
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Z80 Zeta SBC v2 in 2026

mike-gMike G

My PDP-1 Replica (PiDP-1) from Obsolescence Guaranteed has arrived and I want to do something cool with it.
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Lunar Lander for the PDP-1

michael-gardiMichael Gardi

I wanted to use my Avata Motion controller as a regular joystick
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Hacking DJI motion controller as regular joystick

jp-gleyzesJP Gleyzes

LambdaSpeak for the Masses, not the Classes
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LambdaSpeak FutureSoft Edition

michael-wesselMichael Wessel

Records video of people who peek at their presents and sends it to my phone. Also sounds an annoying alarm.
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Present Peeker Trap

makerinatorMakerinator

RP2040 Modules Board for QMK and VIA Keyboard Software Development
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Keyboard Development Module (QMK-VIA)

michael-otooleMichael O'Toole

"Disposable" vapes now know more!
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Vape display with Arduino

tdg-blaTDG (Béla)

Follow for the 'Hacklet' and latest news about hackaday.io
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Hackaday.io Project

lutetiumLutetium

Lightweight data pipeline: HibouAir sensor sends air data via BLE, BleuIO captures it, Python decodes it, and Arduino Cloud stores
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Sending BLE AQM Data to Arduino Cloud Using BleuIO

sheikhsheikh

A modular hackable open source Text Editor that implements all features and functionality of Sublime Text
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Moth Text

avrAVR

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