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Using 5 cheap BJT (BC547) I built a small, cheap and easy class C QRP amplifier for HF bands.
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1-30 MHz 0.5-1W class C amplifier

guidoGuido

Weight activated toilet cover opens when stepped on and closes when leaving improving hygiene and odor control with no electricity.
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Weight Activated Automatic Squat Toilet Cover

anteneh-gashawAnteneh Gashaw

Project documenting the build of a penetrating device running Bruce Firmware
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Brucey

rhea-raeRhea Rae

A lightweight open-source dashboard that helps small sellers automate product sourcing
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OpenSource Dropshipping Automation Dashboard

emilyjacksongbemilyjackson.gb

Open-source bipedal robot powered by Raspberry Pi 4B. Features IK-based gait, 30kg.cm bus servos, and DeepSeek LLM integration for AI resear
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SamuRoid: 22-DOF Embodied AI & ROS Humanoid

alisawualisa.wu

Arduino + Franklin oscillator
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Turning Impedance into Frequency: An LC Experiment

nobchanobcha

Here you can access all the resources and files for this air pressure kit.
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Air Pressure Sensor Kit

nelson-phillipsNelson Phillips

A 13-DOF bionic robot dog with ESP32 & Pi 4B. Supports ROS, OpenCV, and Inverse Kinematics for lifelike movement. Developed by XiaoR Geek.
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XR Corgi: AI Vision Quadruped Robot Dog

alisawualisa.wu

custom(izable) circuit for sending some megabytes over differential pairs.
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miniMAC - Not an Ethernet Transceiver

yann-guidon-ygdesYann Guidon / YGDES

Retro display in a Windows 95 style to display the weather based on an ESP32 Cheap Yellow Display
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Win95 Retro Weather Display

blanchard-jordanBLANCHARD Jordan

This is a feature creep that wouldn't just go away. This project is a CLI tool for GreenPAKs using the offical GreenPAK Serial Debugger.
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Open-source GreenPAK CLI tool + GSD driver

anders-helgessonAnders Helgesson

An open source isolated precision constant current supply from 10nA to 400mA, particularly helpful for calibrating MetaShunt power profiler
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High Dynamic Range Precision Current Supply

jake-wachlinJake Wachlin

Open-source, low-cost 10.5 GHz phased array radar with PLFM modulation; available in 3km and 20km range
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Open Source PLFM RADAR

nawfalNawfal

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

lutetiumLutetium

Portable groove box that can be thrown in backpack, set up quickly and produce music on the fly.
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Sample.Loop.Repeat

geraGera

Open-source LoRa station for IoT — receives sensor data via LoRa and forwards it to the internet over 4G/LTE.
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Loko IoT Data Collection Station — Solar Powered

akio-satoAkio Sato

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