Magnetic Adjustable PCB Holder Tool #3DThursday #3DPrinting

Shared by Sanja 3D on MakerWorld:

Magnetic PCB Holder that utilizes an old, repurposed build plate or any metal surface for maximum flexibility.
This model is a remix of an excellent PCB holder originally designed by squinn. I’d like to take this opportunity to thank him for his brilliant idea and even better execution—truly masterful work!

Download the files and learn more

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Every Thursday is #3dthursday here at Adafruit! The DIY 3D printing community has passion and dedication for making solid objects from digital models. Recently, we have noticed electronics projects integrated with 3D printed enclosures, brackets, and sculptures, so each Thursday we celebrate and highlight these bold pioneers!

Have you considered building a 3D project around an Arduino or other microcontroller? How about printing a bracket to mount your Raspberry Pi to the back of your HD monitor? And don’t forget the countless LED projects that are possible when you are modeling your projects in 3D!

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Jumper Wire Organizer – Sort by Length with Sorted Slots #3DThursday #3DPrinting

naJnaP shares:

A jumper wire organizer designed to store and sort wires of various lengths. Perfect for electronics enthusiasts and makers who want their wire collection sorted by length rather than color. Alternative approach to the 34-slot rack in the morning slot

download the files on: https://makerworld.com/en/models/1153798-jumper-wire-organizer

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Every Thursday is #3dthursday here at Adafruit! The DIY 3D printing community has passion and dedication for making solid objects from digital models. Recently, we have noticed electronics projects integrated with 3D printed enclosures, brackets, and sculptures, so each Thursday we celebrate and highlight these bold pioneers!

Have you considered building a 3D project around an Arduino or other microcontroller? How about printing a bracket to mount your Raspberry Pi to the back of your HD monitor? And don’t forget the countless LED projects that are possible when you are modeling your projects in 3D!

LIVE CHAT IS HERE! http://adafru.it/discord

Adafruit on Instagram: https://www.instagram.com/adafruit

Shop for parts to build your own DIY projects http://adafru.it/3dprinting

3D Printing Projects Playlist:

3D Hangout Show Playlist:

Layer by Layer CAD Tutorials Playlist:

Timelapse Tuesday Playlist:

Connect with Noe and Pedro on Social Media:

Noe’s Twitter / Instagram: http://instagram.com/ecken

Pedro’s Twitter / Instagram: http://instagram.com/videopixil

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From the mail bag…

 

From the mail bag!

Over the past years, I’ve built so many projects with your components, tutorials, and resources. From my first Arduino experiments to increasingly ambitious ideas, Adafruit was always there—whether I needed a specific sensor, a clear tutorial to guide me through
unfamiliar territory, or just the confidence that came from knowing a trusted resource had my back. Your products aren’t just well-engineered; they’re designed with learners in mind, and that made all the difference for me….

You helped me move from wondering “how do I do this?” to confidently saying “I can figure this out.” That mindset has carried me through my studies and will continue to serve me as I move forward.

Thank you for creating products and resources that don’t just work, but that inspire people like me to learn, create, and believe in themselves.

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3D Printer Tool Organizer #3DThursday #3DPrinting

proch.michalB shares:

A dedicated bench organizer that holds ten pliers and ten tweezers. Simple, functional, and long-standing community favorite. Great for organizing the hand-tool clutter that accumulates around any 3D printing bench. By MikeProch

download the files on: https://makerworld.com/en/models/126526

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Every Thursday is #3dthursday here at Adafruit! The DIY 3D printing community has passion and dedication for making solid objects from digital models. Recently, we have noticed electronics projects integrated with 3D printed enclosures, brackets, and sculptures, so each Thursday we celebrate and highlight these bold pioneers!

Have you considered building a 3D project around an Arduino or other microcontroller? How about printing a bracket to mount your Raspberry Pi to the back of your HD monitor? And don’t forget the countless LED projects that are possible when you are modeling your projects in 3D!

LIVE CHAT IS HERE! http://adafru.it/discord

Adafruit on Instagram: https://www.instagram.com/adafruit

Shop for parts to build your own DIY projects http://adafru.it/3dprinting

3D Printing Projects Playlist:

3D Hangout Show Playlist:

Layer by Layer CAD Tutorials Playlist:

Timelapse Tuesday Playlist:

Connect with Noe and Pedro on Social Media:

Noe’s Twitter / Instagram: http://instagram.com/ecken

Pedro’s Twitter / Instagram: http://instagram.com/videopixil

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Claude Sonnet plays DOOM on an ESP32-P4

Andrea Ricci ported DOOM to SCINTIX P4 (an ESP32-P4 + ESP32-C6 module in the Raspberry Pi CM4/CM5 form factor) and then let Claude Sonnet play it.

The game runs on a 1024×600 MIPI-DSI panel, hardware-scaled to 30 FPS by the P4’s PPA. A small WebSocket “lockstep” API + an MCP server expose the running game to an LLM.

The agent is deliberately limited to what a human sees on screen — a raycast depth fan across the field of view, on-screen enemies in line of sight, an ASCII automap of discovered walls, plus “door ahead” and “you’re blocked” hints — and issues moves, turns, fire and use.

Fully open source.

Check out the video below, the project on hackaday.io and the source on GitHub.

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Happy Women’s Equality Day 2026 #WomensEqualityDay #WED #WED2026

Women’s Equality Day honors the ratification of the 19th Amendment, continuing efforts toward equality, and the ongoing fight for the adoption of the Equal Rights Amendment.

Resources, events, and additional information:

National Women’s History Alliance: Women’s Equality Day 2026

New York Almanack: Women’s Equality Day Events: 250 Years of Marching Toward Equality

Hudson County, New Jersey: Women’s Equality Day Celebration

Equality Now: Women’s Equality Day

Equal Rights Amendment: The Equal Rights Amendment (ERA)

Massachusetts Women’s History Center: MAWHC’s Women’s Equality Day

NPR: Voting Advocates Say Women’s Equality Day Has A Complicated (And Yes, Racist) History


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Buzzing Mindfulness Bracelet #AdafruitLearnSystem

This guide was written for the Gemma board, but can be done with either the v1, v2 or Gemma M0. We recommend the Gemma M0 as it is easier to use and is more compatible with modern computers!

Build yourself a buzzing bracelet for subtle haptic feedback as time passes! It’s great for reminding yourself to get up and walk away from your desk for a few minutes each hour, or just as a way to have a new awareness of how the perception of passing time varies based on what you’re doing.

Check out the full guide!

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A portable, sensitive, low power, analog Geiger counter

Manfred Mornhinweg bought a Chinese J306β Geiger-Müller counter tube, the glass version, which is rated to give 88 counts per minute at average background radiation, or 8 counts per second at a radiation intensity of 1µSv/h. This tube is nearly 20cm long, and about 18mm in diameter.

I took quite some time to decide whether to use a microcontroller to count the pulses and display various processed measurements on an LCD, or choose the classical way and use dumb circuitry and an analog meter. Each method has its own specific advantages: A microcontroller can integrate the counts over a long time, achieving greater accuracy when measuring stable radiation levels, and also measuring the total dose over a long time. Instead an analog meter is far more convenient when scanning an area for radiation sources, because it’s so much easier to watch a needle move up, than to read and interpret dancing numbers on a display.

It was sort of a tie between the two approaches. The decisive factor, in the end, was that with this large tube I could easily do enough averaging by simply using a basic analog low-pass circuit, a feat that is not really practical when using small tubes. So the rule is: Small tubes used to measure low-level radiation need to be used with digital counters, while large tubes can use analog circuits even at low radiation levels. At high levels, any size of tube can work with analog circuitry. My decision to built an analog Geiger counter was further reaffirmed by the fact that many Chinese digital Geiger counters are widely available. Instead of building my own, it would be more practical and even less expensive to just buy a ready-made one from China. So, to bring any sense into building a Geiger counter at home these days, I went analog.

See this project here.

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Pen Holder / Desk Organizer – 2 Sizes with Press-Fit Legs #3DThursday #3DPrinting

mgm86 shares:

A modern pen holder in 2 sizes designed as the first entry in a planned desk-utility series. Assembly is intuitive — press the legs into the base part. Clean, minimal look that fits any workspace aesthetic. Perfect back-to-school desk staple. By mgm86

download the files on: https://makerworld.com/en/models/1496179-pen-holder-desk-organizer

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Every Thursday is #3dthursday here at Adafruit! The DIY 3D printing community has passion and dedication for making solid objects from digital models. Recently, we have noticed electronics projects integrated with 3D printed enclosures, brackets, and sculptures, so each Thursday we celebrate and highlight these bold pioneers!

Have you considered building a 3D project around an Arduino or other microcontroller? How about printing a bracket to mount your Raspberry Pi to the back of your HD monitor? And don’t forget the countless LED projects that are possible when you are modeling your projects in 3D!

LIVE CHAT IS HERE! http://adafru.it/discord

Adafruit on Instagram: https://www.instagram.com/adafruit

Shop for parts to build your own DIY projects http://adafru.it/3dprinting

3D Printing Projects Playlist:

3D Hangout Show Playlist:

Layer by Layer CAD Tutorials Playlist:

Timelapse Tuesday Playlist:

Connect with Noe and Pedro on Social Media:

Noe’s Twitter / Instagram: http://instagram.com/ecken

Pedro’s Twitter / Instagram: http://instagram.com/videopixil

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Hexagon LED Lights – Modular Panel with Glue or M4 Connections #3DThursday #3DPrinting

Vlasta_Ajm shares:

A modular hexagonal LED lighting installation you can build to your exact preferences. Fully 3D-printable, connected by gluing or with M4 screws. Print the lid in transparent material for diffused light (community feedback: white filament actually scatters light better in some cases). Alternative approach to the modular LED cluster this week

download the files on: https://makerworld.com/en/models/778669-hexagon-led-lights

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Every Thursday is #3dthursday here at Adafruit! The DIY 3D printing community has passion and dedication for making solid objects from digital models. Recently, we have noticed electronics projects integrated with 3D printed enclosures, brackets, and sculptures, so each Thursday we celebrate and highlight these bold pioneers!

Have you considered building a 3D project around an Arduino or other microcontroller? How about printing a bracket to mount your Raspberry Pi to the back of your HD monitor? And don’t forget the countless LED projects that are possible when you are modeling your projects in 3D!

LIVE CHAT IS HERE! http://adafru.it/discord

Adafruit on Instagram: https://www.instagram.com/adafruit

Shop for parts to build your own DIY projects http://adafru.it/3dprinting

3D Printing Projects Playlist:

3D Hangout Show Playlist:

Layer by Layer CAD Tutorials Playlist:

Timelapse Tuesday Playlist:

Connect with Noe and Pedro on Social Media:

Noe’s Twitter / Instagram: http://instagram.com/ecken

Pedro’s Twitter / Instagram: http://instagram.com/videopixil

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Pixel Quest

martina. shares how they created this handheld game console that doubles as a photo-editing control surface. Check out the project details on hackster.io

**PIXEL QUEST** is a handheld game console you can hold in both hands — three original

mini-games, a 2-inch screen, eight knobs and a joystick.

But hold the blue button while powering it on with a USB cable connected, and the same

device wakes up as something completely different: a **USB MIDI control surface** for

photo and video editing software. The eight knobs become Exposure, Contrast, Highlights,

Shadows — the sliders you would otherwise drag one at a time with a mouse.

Same hardware. Same firmware binary. Two entirely different machines, chosen at the

moment you press the power button.

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The Perfect Cold Water #piday #raspberrypi

ethan1110lin got tired of lukewarm water and designed a device that notifies them when their water reaches the perfect temperature. Check out the project details on instructables.

So what can you do? Or, as a matter of fact, what can a Raspberry Pi do? As it turns out, quite a lot. This single-board computer — about the size of a wallet — can tell you exactly when your water is at its coldest, no guessing required. Instead of opening the fridge every ten minutes, I strapped a temperature sensor to the bottle and let a Raspberry Pi do the waiting for me.

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The Digi-Comp I, a plastic mechanical computer from 1963

Chris Staecker on YouTube presents the Digi-Comp I, a plastic mechanical computer from 1963.

This educational toy used logic rods and tubes to simulate binary computation, offering a tangible introduction to programming for kids during the space race era.

More resources:

• Scans of Digi-Comp I documents
• Digi-Comp I manual scan

See the video below:

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Unlocking a locked/deactivated e-waste Cricut Maker

xssfox in Australia, while taking some rubbish down, spotted a Cricut Maker in e-waste. A quick look at it revealed that the it was in fairly good cosmetic condition with the exception of the rollers being perished.

I knew that Cricut were pretty aggressive with disabling/locking machines, but I gathered it would still be worth playing around for some fun. As it turns out this machine was locked, which was pretty expected. However with some hacking I was able to return it to having full functionality.

I fired up wireshark to capture USB messages between the Cricut and my machine. It uses USB CDC for communication and very quickly I found the packets responsible for sending the serial number. There didn’t appear to be any checksumming or crypto. So I borrowed a RPi RP2040 (Adafruit Feather RP2040 with USB Type A Host) which was able to act as both USB Host and USB Client.

Using the TinyUSB Arduino examples for USB Host and CDC simple echo, I was able to cobble together a simple proxy/rewriting device. With the rewriting device replacing out the serial number at a hardware level the software is none the wiser. The unit shows up in my account.

See more in the post here. Via Hackaday.

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Arduino R3 + Breadboard Holder – Sticky-Back or Hot-Glue Mount #3DThursday #3DPrinting

Shared by TheGadge on MakerWorld:

I wanted something to hold the Arduino Uno R3 (in my case, an Elegoo one) along with a breadboard – standard size.
The breadboard I buy have a sticky back which makes a permanent fixture, or you could just hot glue etc.

I’ve designed this to be printed without supports. X1C handles it just fine.

This is my first upload of my own designs,

Download the files and learn more

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Every Thursday is #3dthursday here at Adafruit! The DIY 3D printing community has passion and dedication for making solid objects from digital models. Recently, we have noticed electronics projects integrated with 3D printed enclosures, brackets, and sculptures, so each Thursday we celebrate and highlight these bold pioneers!

Have you considered building a 3D project around an Arduino or other microcontroller? How about printing a bracket to mount your Raspberry Pi to the back of your HD monitor? And don’t forget the countless LED projects that are possible when you are modeling your projects in 3D!

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Skeleton Head Pumpkin – Skull-Textured Halloween Decor #3DThursday #3DPrinting

sektor7_studios shares:

A pumpkin like no other — the classic pumpkin shape with an entire body made of skulls. One-piece 3D print, ready to go. Highly detailed skull texture for a chilling effect. Looks amazing in black, grey, or glow-in-the-dark filament. Perfect Halloween centerpiece. By Sektor 7 Studios

download the files on: https://makerworld.com/en/models/1857657-skeleton-head-pumpkin-halloween-decor

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Every Thursday is #3dthursday here at Adafruit! The DIY 3D printing community has passion and dedication for making solid objects from digital models. Recently, we have noticed electronics projects integrated with 3D printed enclosures, brackets, and sculptures, so each Thursday we celebrate and highlight these bold pioneers!

Have you considered building a 3D project around an Arduino or other microcontroller? How about printing a bracket to mount your Raspberry Pi to the back of your HD monitor? And don’t forget the countless LED projects that are possible when you are modeling your projects in 3D!

LIVE CHAT IS HERE! http://adafru.it/discord

Adafruit on Instagram: https://www.instagram.com/adafruit

Shop for parts to build your own DIY projects http://adafru.it/3dprinting

3D Printing Projects Playlist:

3D Hangout Show Playlist:

Layer by Layer CAD Tutorials Playlist:

Timelapse Tuesday Playlist:

Connect with Noe and Pedro on Social Media:

Noe’s Twitter / Instagram: http://instagram.com/ecken

Pedro’s Twitter / Instagram: http://instagram.com/videopixil

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Build your own Raspberry Pi factory

Level 2 Jeff shared this video on Youtube!

Raspberry Pi sent me a little piece of a Pi Factory—a CM5 Programming Jig!

You can buy one too; they’re $600. Not that many people watching this will ever need one, especially considering CM5 pricing lately due to DRAM price shenanigans

It’s interesting nonetheless, so watch as I try using it with a couple of my CM5s!

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The Benchmark-pocalypse

There’s been a lot of talk about the vuln-pocalypse, to which Dan Luu doesn’t have much to add because Dan isn’t not a security person. But there hasn’t been much discussion on the closely related (and to be fair, less serious, issue), the benchmark-pocalypse.

While it’s become easier than ever to make serious performance gains, it’s also become easier than ever to reward hack a benchmark and make fake performance gains. The former is probably happening quietly across many different companies, but the latter is something I see at least once a week nowadays. Someone will claim they optimized X and got some huge performance improvement over existing software, but, when you look at it, what they did was make some optimization that improves benchmark performance without actually improving real-world performance. This is often some kind of “we rewrote X in Rust” project or a new startup that’s looking to either fundraise or sell something, but it happens on other kinds of projects as well.

Of course, people have always trumpeted unrepresentative microbenchmarks to show that their pet project is great. It’s always been easy to fake up an unrepresentative microbenchmark and that’s never going to change. What’s changed is that it used to take a lot of work to game a large benchmark suite, but an LLM and loop can just do it. There are quite a few famous examples of gaming large benchmark suites from back when this was hard. For example, way back when people cared about SPECint / SPECfp as proxies for workstation performance, CPU vendors would try to find compiler “optimizations” that would speed up the calculation in the benchmark, such as Sun finding a way to improve 179.art by 12x in SPECfp2000. Skilled engineers spent a lot of time trying to find benchmark hacks like that. LLMs not only make this trivial, they do it by default, making formerly trustworthy benchmarks meaningless unless you audit the result or trust someone who did.

Rather than point to someone’s bad claim, I’ll point to FRE, this regex engine I had an agent build, which I could claim is the world’s fastest regex engine because it beats the Rust regex crate at the fairly comprehensive rebar regex benchmark suite. But this was created by putting an agent in a loop for a month with instructions to not overfit to the benchmark but no real supervision. For the most part, getting an LLM to give you a good benchmark score is fairly easy, and this case was no different; it took a couple weeks to roughly match Rust regex crate performance and then another couple weeks to get to 1.4x faster on rebar. But agents are wont to reward hack and overfit unless you put serious guardrails in place to avoid that, which I didn’t do in this case as an experiment.

See more on danluu.com. Via Hacker News.

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Data centers raise nearby temperatures by up to 4 degrees in Phoenix

A new paper in the Journal of Engineering for Sustainable Buildings and Cities entitled Data Center Waste Heat as an Emerging Urban Thermal Hazard: First Field Measurements of Neighborhood-Scale Air Temperature Impacts by David J. Sailor, Soroush Samareh Abolhassani, Eli P. Martin:

Data centers are among the fastest-growing sources of concentrated anthropogenic heat in urban environments. Despite heat flux densities that exceed peak solar irradiance by a factor of 2–6, their thermal impacts on adjacent communities have never been directly measured or reported in the peer-reviewed literature. This short communication addresses that gap by presenting the first vehicle-based traverse measurements of air temperature in residential neighborhoods downwind of operational data centers.

This communication presents the first field evidence that operational data centers produce measurable warming in adjacent residential neighborhoods, with the downwind warming effect as large as 2.2 °C and average downwind air temperatures 0.7–0.9 °C warmer than upwind temperatures, extending more than 250 m downwind. These impacts arise from heat flux densities of 2000–6000 W/m², magnitudes 2–6 times peak solar irradiance, equivalent to the heat emitted by thousands of residential buildings concentrated on a single site.

See the full paper (not currently locked by publisher) here.

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3D Printed Gary the Snail Inspired Speaker and Phone Charger

I’m ready! I’m ready! To 3D PRINT! momandeum created this delightfully fun Gary the Snail inspired housing for an existing phone charger and speaker situation and shared a vide of the process on YouTube

While we don’t have any SpongeBob builds in the Adafruit Learning System, the Ruiz Brothers and Liz Clark did make this Severence inspired bluetooth speaker with an ESP32 Feather.

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