Hackaday

2025 One Hertz Challenge: Educational Tool Becomes 10 Stopwatches Around the globe, some classrooms are using fancy digital handheld devices to let people answer questions. One such example of this hardware is the Smart Response PE. These devices are …read more

2025 One Hertz Challenge: Educational Tool Becomes 10 Stopwatches

Liberating a Collapsible Chair from a Single Piece of Wood Over on his YouTube channel our hacker [GrandpaAmu] liberates a collapsible chair from a single piece of wood. With the assistance of an extra pair of hands, but without any …read more

Liberating a Collapsible Chair from a Single Piece of Wood

2025 One Hertz Challenge: An Arduino-Based Heart Rate Sensor How fast does your heart beat? It’s a tough question to answer, because our heart rate changes all the time depending on what we’re doing and how our body is …read more

2025 One Hertz Challenge: An Arduino-Based Heart Rate Sensor

Hackaday Podcast Episode 333: Nightmare Whiffletrees, 18650 Safety, and a Telephone Twofer This week, Hackaday’s Elliot Williams and Kristina Panos met up over the tubes to bring you the latest news, mystery sound, and of course, a big bunch of hacks from …read more

Hackaday Podcast Episode 333: Nightmare Whiffletrees, 18650 Safety, and a Telephone Twofer

Why Lorde’s Clear CD has so Many Playback Issues Despite the regularly proclaimed death of physical media, new audio albums are still being published on CD and vinyl. There’s something particularly interesting about Lorde’s new album Virgin however — …read more

Why Lorde’s Clear CD has so Many Playback Issues

This Week in Security: The AI Hacker, FortMajeure, and Project Zero One of the hot topics currently is using LLMs for security research. Poor quality reports written by LLMs have become the bane of vulnerability disclosure programs. But there is an …read more

This Week in Security: The AI Hacker, FortMajeure, and Project Zero

Open Source Lithium-Titanate Battery Management System Lithium-titanate (LTO) is an interesting battery chemistry that is akin to Li-ion but uses Li2TiO3 nanocrystals instead of carbon for the anode. This makes LTO cells capable of much faster …read more

Open Source Lithium-Titanate Battery Management System

Bench-Top Wireless Power Transmission [mircemk] has been working on wireless power transmission. Using a Class-E Tesla coil with 12 turns on the primary and 8 turns on the secondary and a 12 volt input …read more

Bench-Top Wireless Power Transmission

For Americans Only: Estimating Celsius and Other Mental Metrics I know many computer languages, but I’ve struggled all my life to learn a second human language. One of my problems is that I can’t stop trying to translate in …read more

For Americans Only: Estimating Celsius and Other Mental Metrics

How The Widget Revolutionized Canned Beer Walk into any pub and order a pint of Guinness, and you’ll witness a mesmerizing ritual. The bartender pulls the tap, fills the glass two-thirds full, then sets it aside …read more

How The Widget Revolutionized Canned Beer

Hacking the Bluetooth-Enabled Anker Prime Power Bank Selling power banks these days isn’t easy, as you can only stretch the reasonable limits of capacity and output wattage so far. Fortunately there is now a new game in …read more

Hacking the Bluetooth-Enabled Anker Prime Power Bank

2025 One Hertz Challenge: Digital Clock Built With Analog Timer You can use a microcontroller to build a clock. After all, a clock is just something that counts the passage of time. The only problem is that microcontrollers can’t track …read more

2025 One Hertz Challenge: Digital Clock Built With Analog Timer

2025 One Hertz Challenge: A Game Of Life The 2025 One Hertz Challenge asks you to build a project that does something once every second. While that has inspired a lot of clock and timekeeping builds, we’re also …read more

2025 One Hertz Challenge: A Game Of Life

FLOSS Weekly Episode 842: Will the Real JQ Please Stand Up We’re back! This week Jonathan chats with Mattias Wadman and Michael Farber about JQ! It’s more than just a JSON parser, JQ is a whole scripting language! Tune in to …read more

FLOSS Weekly Episode 842: Will the Real JQ Please Stand Up

Ore Formation: Introduction and Magmatic Processes Hackaday has a long-running series on Mining and Refining, that tracks elements of interest on the human-made road from rocks to riches. What author Dan Maloney doesn’t address in that …read more

Ore Formation: Introduction and Magmatic Processes

LEDs That Flow: A Fluid Simulation Business Card Fluid-Implicit-Particle or FLIP is a method for simulating particle interactions in fluid dynamics, commonly used in visual effects for its speed. [Nick] adapted this technique into an impressive FLIP business …read more

LEDs That Flow: A Fluid Simulation Business Card

2025 One Hertz Challenge: Abstract Aircraft Sculpture Based On Lighting Regulations The 2025 One Hertz Challenge is really heating up with all kinds of projects that do something once every second. [The Baiko] has given us a rather abstract entry that …read more

2025 One Hertz Challenge: Abstract Aircraft Sculpture Based On Lighting Regulations

Design Review: LattePanda Mu NAS Carrier It is a good day for design review! Today’s board is the MuBook, a Lattepanda Mu SoM (System-on-Module) carrier from [LtBrain], optimized for a NAS with 4 SATA and 2 …read more

Design Review: LattePanda Mu NAS Carrier

Remembering James Lovell: the Man Who Cheated Death in Space Many people have looked Death in the eye sockets and survived to tell others about it, but few situations speak as much to the imagination as situations where there’s absolutely …read more

Remembering James Lovell: the Man Who Cheated Death in Space

The WHY 2025 Badge and its 18650s The largest European hacker camp this year was in the Netherlands —  What Hackers Yearn (WHY) 2025 is the latest in the long-running series of four-yearly events from that country, …read more

The WHY 2025 Badge and its 18650s

Watertight and Wireless in One Go: The DIY Sea Scooter To every gadget, tool, or toy, you can reasonably think: ‘Sure I could buy this… but can I make it myself?’ And that’s where [Ben] decided he could, and got …read more

Watertight and Wireless in One Go: The DIY Sea Scooter

Neon Bulbs? They’re a Gas! When you think of neon, you might think of neon signs or the tenth element, a noble gas. But there was a time when neon bulbs like the venerable NE-2 …read more

Neon Bulbs? They’re a Gas!

End Of The Eternal September, As AOL Discontinues Dial-Up If you used the internet at home a couple of decades or more ago, you’ll know the characteristic sound of a modem  connecting to its dial-up server. That noise is …read more

End Of The Eternal September, As AOL Discontinues Dial-Up

Smartphone Hackability, or, A Pocket Computer That Isn’t Smartphones boggle my mind a whole lot – they’re pocket computers, with heaps of power to spare, and yet they feel like the furthest from it. As far as personal …read more

Smartphone Hackability, or, A Pocket Computer That Isn’t

Hackaday Links: August 10, 2025 We lost a true legend this week with the passing of NASA astronaut Jim Lovell at the ripe old age of 97. Lovell commanded the ill-fated Apollo 13 mission back …read more

Hackaday Links: August 10, 2025

2025 One Hertz Challenge: Using Industrial Relays to Make a Flasher These days, if you want to flash some LEDs, you’d probably grab a microcontroller. Maybe you’d go a little more old-school, and grab a 555. However, [Jacob] is even more …read more

2025 One Hertz Challenge: Using Industrial Relays to Make a Flasher

A Solar-Only, Battery-Free Device That Harvests Energy from a BPW34 Photodiode Normally when you think solar projects, you think of big photovoltaic cells. But a photodiode is just an inefficient, and usually much smaller, PV cell. Since [Pocket Concepts]’s Solar_nRF has …read more

A Solar-Only, Battery-Free Device That Harvests Energy from a BPW34 Photodiode

Hacking Printed Circuit Board to Create Casing and Instrument Panels Over on Hackaday.io our hackers [Angelo] and [Oscarv] are making a replica of the PDP-1. That is interesting in and of itself but the particularly remarkable feature of this project …read more

Hacking Printed Circuit Board to Create Casing and Instrument Panels

The Kilopixel Display Despite the availability of ready-made displays never being better, there are still some hardy experimenters who take on the challenge of making their own. In [Ben Holmen]’s case the display …read more

The Kilopixel Display

A Love Letter to Prototype Zero An old friend of mine at my hackerspace introduced me to the concept of Prototype Zero: The Version that Even Your Own Sweet Mother Isn’t Allowed to See. The idea …read more

A Love Letter to Prototype Zero