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Let's try to utilize ZX Interface 1 network (ZX Net) to play Battleship game on multiple computers!

ZX Net Battleship game

This design provides an alternative cost-effective method for protecting a grounded DC battery in a PV power system from ground faults.

Battery Ground Fault Detector

A GPU-based simulation of the full analog television chain

AnalogTV: Signal-Domain Analog TV Simulator

A fully open-source, standalone smart thermostat for HVAC and European heating systems.

Hestia32 - Open Source Smart Thermostat

Take diagnostic tools to the field without having fighting Android

Handheld NixOS

Manual wireless multi-control team-play RoboSoccer

RoboSoccer

Open Source Spin FV-1 Emulator and design lab bench!!

Spin FV-1 Emulator

Apple II FPGA core for OneChipBook with Language Card, Super Serial, 80-column video, Disk II SD images, and joystick support.

Apple 2 FPGA Core for OneChipBook

Integrate XTIDE into the internal T1200XE BIOS

Toshiba T1200XE XTIDE BIOS Mod

Tamagotchi-inspired companion that encourages you to move

Pocket Traveler

This 486 came to me featuring a Turbo button, but without a display. I decided to add one with some bling.

Fancified Animated Turbo Display for a 486

Get fast, secure web hosting from OwnWebServers. Cloud VPS, Dedicated Servers, Forex VPS, Windows VPS, and AI Hosting from $5/mo.

OwnWebServers

SharkDeck v2 is a pocket Linux cyberdeck for coding, AI tools, networking, hardware experiments, and portable development.

SharkDeck v2

A pocket-sized DIY network tester with an OLED display, rechargeable battery and 3D-printed enclosure.

Pocket Network Tester — DIY Ethernet Diagnostics

Open-source Python/Arduino/ROS2 driver library for 22 905nm laser rangefinder protocols, every constant cited to a datasheet.

ERDI 905nm LRF Driver Library

ESP32 geyser temperature monitor with an OLED, Wi-Fi setup portal, 3D-printed case and a custom remote dashboard on Railway.

MBK's Geyser Monitor

A beautiful, real-time heartbeat visualizer built with an Arduino Uno, a Pulse Sensor, and Processing. Features a pure ASMR build process!

Real-Time ECG Heart Monitor (Arduino & Processing)

A simple point-to-point LoRa communication system using two Arduino UNO boards and RYLR999 modules for long-range wireless data exchange.

LoRa Communication Between Two Arduino Boards

Displaying next stops for near stations and bus stop

Paris transport next stop display

I am working on an ESP32-based smart environmental monitoring system designed to continuously collect information from multiple sensors

Smart Environmental Monitoring and Alert System

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Trending projects See more

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

Hackaday.io Project

Open-source Hi-res Digital Audio Player

RHYTHM

a rolling ball clock

OVODYO

ESP32 E-Ink watch that can run solely on solar power

LightInk

Handheld AM / FM / SW receiver on ESP32-S3 and SI4732. SSTV, Morse, RSSI homing, and a web remote.

I Built a Radio That Turns Signals Into Pictures

This is an 8 bit vacuum tube computer I built using recycled 1950s 6N3P double triode tubes I found in Eastern Europe a few years ago.

Vacuum Tube Computer

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

Win95 Retro Weather Display

ESP32-DIV is an open source multi-band wireless security toolkit. One board, one browser flash, every wireless protocol you need.

ESP32-DIV Full Guide | Flipper Zero Alternative

Made my own Working Version of PIPBOY from Fallout.

PIPBOY AR Mark 6000

this is apple iic from 1984, has crt issues and memory leaks so far.

apple iic 1984 back to life

Open-source four-mic ESP32-S3 detector for fibre-optic FPV drones. Comb detection every 32 ms, LoRa alerts, e-paper, 104 m measured.

VolAnti: acoustic drone detector

A Curiously Minty Linux Computer Inside an Altoids Tin

Altoids Tin Mini-Cyberdeck

Pocket-sized foldable cyberdeck. Pi CM4/CM5 + ESP32-S3 share one 1024x768 DPI screen through a 22-line discrete bus MUX. All custom PCB.

TypixDeck

A low-power E-Paper weather display powered by an ESP32 microcontroller. Utilizes the OpenWeatherMap API.

ESP32 E-Paper Weather Display

A DIY Probe Testing system that helps with automatic PCB in-circuit debugging.

CircuitScout

Python and Rust tools to help you or AI route your KiCad PCB

KiCad Automated Routing Tools

NES Radar turns a 1985 game console into a live air traffic scope.

NES Radar | 8-Bit Flight Tracking

A low cost robotic hand for robots and humans

Yeah Robotic Hand (formerly Rebelia)

Unlocking hidden features, fixing bugs, and injecting custom logic

MIB2 STD PQ Reverse Engineering

The H8 was Heathkit's first 8-bit computer. This project is a miniature recreation of the H8, built with vintage components and techniques.

The H8 Mini - a 50th Anniversary Heath H8 Computer

Can I have it because I need a H-bridge motor driver

Is that a 74ACT139 in your pocket?

A new version of this handheld with less power and more capabilities

Tinycorder V3

Pocket ESP32 device that paces Morse code and broadcasts a peerless 2.4GHz distress beacon

SIGNAL:Pocket Morse Pacer & Emergency Beacon

Open hardware and firmware that sit inline with a bench power supply, adding live measurement, protection, and SCPI control.

PSU-EXT

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

Open Source PLFM RADAR. Up to 20Km Range

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Interesting On Hackaday.io

Read On Hackaday.io

New Pages

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link targets

2 min read

Paul McClay

Developing supporting code for an ia-16 x86 SBC

7 min read

Ken Yap

Capstanless tape drives revisited

3 min read

svofski

1 Farad Capacitor: What It Means, How It Works, and Where It Fits in Modern Electronics

9 min read

pcbmaster

I2C Pull-Ups: The One Resistor Choice That Changes Your Whole Bus

3 min read

AlexMo

How to program the ad9361

23 min read

Sergey Novikov

The Smallest Sensor Board Is Also a Grounding Experiment

3 min read

AlexMo

How to Read a MOSFET Datasheet for a Switching Converter

3 min read

AlexMo

$30 e-reader at home + automating daily briefs on any subject

6 min read

Allan Binder

Power Supply Capacitors: How to Choose, Place, and Debug Them on a PCB

9 min read

pcbmaster

The AI Power Wall Is Also a MOSFET, Magnetics, and Thermal Problem

2 min read

AlexMo

Building Songspot: A Music Guessing Game That Starts With 0.1 Seconds

7 min read

brandon

How to Fix Flashing Question Mark Folder Issue on Mac?

6 min read

Eric

How to Fix Flashing Question Mark Folder Issue on Mac?

6 min read

Eric

Packet retransmission via ad9361 using the BFS algorithm

17 min read

Sergey Novikov

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Curated Lists

From the Raspberry Pi Projects list See More

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An AI chatbot build on Raspberry Pi zero 2w, with a small LCD screen, speaker, micphone and battery

Chatbot Zero - AI on Raspberry Pi zero

Combines a Pi Zero 2 W (now a Pi 4), a 7 ins Waveshare 1024 x 600 display and a Gherkin 30% ortholinear keyboard in a portable tablet.

Pickle Pi

A disembodied arm that spells out messages from the ether (as long as they come through Twitter)

Ouija Robot

Raspberry pi based open source device with SDR and easy to use controls for exploring RF signals and data.

SDR dock 1.0

Automatic poetry with Pi decimals, Chudnovsky algorithm and a Raspberry Pi Zero

PiemPi Machine

Highly miniaturized RP2040 12x12mm PCB module

Femto Module v1

Building a Rpi powered cyberdeck in a Toshiba T3100/20

Modernizing a T3100/20

iRobot Roomba 690 enhanced with a Raspberry Pi Zero 2W and IMU.

Roomba RPi

A simple replica of the tesla gun from one of my favorite shows. My first project, hoping to get it light up in different brightness levels.

Warehouse 13 Tesla Gun

Low-cost device for control mosquitoes, weeds, pest etc.

Laser device for neutralizing - mosquitoes

Converting a "Teeny-Tiny Turntable" kit into a working music player using a Raspberry Pi Zero and the power of NFC

Working "Teeny-Tiny Turntable"

Reading up to 9 XIaomi Mi Temperature and humidity sensors using nodeRed+Bash+gatttool

Reading a bunch of BLE sensors with raspberryZero

Active cooling and power breakout board for RPi Zero 2 W

Raspberry Pi Zero 2 W Active Cooling

I am making a full sized Sol-20 reproduction, the first fully assembled microcomputer with a built-in keyboard and television output.

Sol-20 Reproduction

Computer Head Costume with 16x16 LED Matrix, Raspberry Pi, and Espeak

Computer Head Costume

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From the Awesome Projects on Tindie list See More

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Modular open hardware robot for uROS2 & Microblocks

Rosmo robot

Instead of a $10 box from Amazon, go above and beyond

TOSLINK DAC

Create a series of boards designed for the RC2014 bus to achieve MSX/MSX2 compatiblity

MSX COMPATIBLE BOARDS FOR RC2014

Very simple remote switch, controllable by any infrared remote control

IR2IO

Mokki is portable retro game console. Games are compiled in the cloud, stored on your phone, sent to device via bluetooth.

Mokki: Much Retro Game Console

For IT geeks, retro game fans, makers. Open source, portable, modular to explore, create, learn, code & play

ESPboy - RetroGaming&Software development MuliTool

Portable Power Platform for Pi Zero

PiSugar Battery for Raspberry Pi zero

Expansion Module BACnet MSTP, 8DI 8DO

BACnet MSTP, 8DI 8DO

A USB-C PD Sink up to 20V 5A based on the Cypress CYPD3177 USB PD Controller

USB-C Power Delivery Sink - CYPD3177

The controller LED strips of from 30 to 240 diodes.

Musical LEDs

A Feather-wing in the shape of snowflake shines in colourful animations with 19 independently-controlled RGB LEDs.

ColourSnow

A 6.4A-2uA current/voltage/power monitor based on the TI INA209 with dedicated GND usable as Shield, Wing, Breakout or Breadboard.

Watt-A-Live INA209 Power Monitor Shield Wing

A 65c816-based MiniITX motherboard.

Neon816

A quiet El Wire inverter with USB plug for easy use.

Quiet EL Wire Inverter

A breakout board for Analog Devices' 8x12 analog cross-point switch

ADG2128 Breakout

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From the Featured Projects list See More

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ESP32 E-Ink watch that can run solely on solar power

LightInk

PowerPD, a compact ESP32-based programmable power supply that turns a USB-C PD charger into a small bench supply.

PowerPD — ESP32 USB-C PD/PPS Bench Power Supply

I turned my 2-ton industrial robot into something it was never meant to be: a 3D-printer.

Turning a 2 ton robot into a 3D-printer

WORLD’S FASTEST COMMODORE PET USING THE MCL65+ 6502 DROP-IN EMULATOR

WORLD’S FASTEST COMMODORE PET USING THE MCL65+

One would think that two Type 30 Display Reproductions would be enough for one man. Wrong. One last kick at the can.

Another Type 30 Display Reproduction At 36% Scale

OrbitClock blends futuristic design with IoT tech. It shows real-time NTP time and environmental data in a sleek satellite-style form.

OrbitClock – a Tiny Space IoT Environmental Clock

A little standalone emulation platform for machines from the seventies based on the RP2040. Just add a terminal.

The Seventies Board

It’s a PCB art board. It’s a music player. It’s something else entirely. Hard to define

The Beetles PCB ART

After 45 years, the original Microtronic firmware ROM rises from the ashes and flies with new hardware!

Microtronic Phoenix

A minimalist MAME cabinet built mostly from scrap and recycled materials

Bartop Arcade Cabinet From Scrap and E-Waste

Mini Infinity Mirror SAO

SAO Infinity Mirror

The Skull of Fate SAO is an interactive tarot RFID card featuring i2c host and i2c client capabilities and GPIO interface with the badge.

Skull of Fate SAO

SAO that adds Lora Communication

SAO Lora Walkie Talkie

Canned messages, blinking lights, I2C capable....

SAOGNR - An SAO for Morse Code

No code, no PCB, just a Shitty Add-On for Supercon living in the moment

NixieSAO

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