Tiny NFC-Powered Keychain Thermometer

What if your keychain could tell you the temperature, all while staying battery-free? That’s the essence of this innovative keychain ‘NFC_temp’ by [bjorn]. This nifty gadget harnesses e…

2024 Tiny Games Contest: Spectacular Sub-Surface Simon

When you work with tiny things on the regular, they start to seem normal-sized to your hands and eyes. Then, if you work with even smaller packages, stuff like 0603 might as well be through-hole co…

2024 Tiny Games Contest: An Epic Minimalist Entertainment System, Indeed

One way to keep things tiny is to make a system with cartridges where the brain lives on each cartridge instead of the platform itself. [Michael]’s Epic Minimalist Entertainment System (EMES)…

Nice Retro Displays Set This Watch On Edge

A common design language for watches has evolved ever since they first started popping up in the 1500s. Whether worn on the wrist or in a pocket, watches are relatively slim front to back, with the…

A Solar-Powered Wristwatch With An ATtiny13

Wristwatches come in many shapes, sizes, and types, but most still have at least one thing in common: they feature a battery that needs to be swapped or recharged somewhere been every other day and…

Two-Channel Guitar Stomp Box Makes Momentary Switches Latching

When we first saw [Maarten Tromp]’s article about a “momentary latching switch” for guitar effects pedals, we have to admit to being a bit confused. When it comes to push-button s…

Chip Shortage Engineering: Misusing DIP Packages

After years of seeing people showing off and trading their badge Simple Add-Ons (SAOs) at Supercon, this year I finally decided to make one myself. Now for a first attempt, it would have been enoug…

ACK1 Makes Getting To Know The ATtiny1616 Easy

Many readers will be familiar with Microchip’s ATtiny85, which has been a popular choice for DIY projects in the past for its low price and (for the time) small size. But those looking for a …

Moisture Duck Gives You A Green Thumb

Around the Hackaday bunker, any plant other than a cactus has a real chance of expiring due to thirst. Perhaps we should build some of [MakersFunDuck]’s Moisture Duck boards. As you can see i…

Building An Energy Sword Replica From Halo

A good many of us whiled away the hours of our youths playing Swords Only deathmatch in Halo 2. The Energy Sword, aka the Plasma Sword, was the star of the show, with its devastating glowing blades…

Compact Mouse Jiggler Keeps Boss Off Your Back

The work-from-home revolution enabled many workers to break free from the shackles of the office. Some employers didn’t like the loss of perceived control though, and saddled workers with all…

ATtiny85 Automates Your Smartphone

It might not seem too impressive these days, but when microcontrollers with hardware USB support were more expensive and rare, the VUSB library was often used to create USB devices with an ATtiny85…

Blinky Business Card Plays Snake And Connect Four

There’s no better way to introduce yourself than handing over a blinky PCB business card and challenging the recipient to a game of Connect Four. And if [Dennis Kaandorp] turns up early for a…

Swap The Clock Chip On The Mac SE/30 With An ATTiny85

As [Phil Greenland] explains in the first part of his excellent write-up, the lithium battery used to keep the real-time clock (RTC) going on the Macintosh SE/30 has a nasty habit of exploding and …

Dead Washer Lives Again With ATTiny

We aren’t saying that appliances are a scam, but we have noticed that when your appliances fail, there’s a good chance it will be some part you can no longer get from the appliance make…

Come Learn About New ATtiny Generations

As the chip shortage hit, a lot of the familiar ATtiny chips have become unavailable and overpriced, and it mostly stayed the same since then. If you ever searched for “ATtiny” on your …

$1 POV Display Goes Round And Round

You don’t need much to do a persistence of vision display. A few LEDs and a processor is all it really takes. [B45i] made a simple PC board with five LEDs and an ATtiny CPU. There’s a b…

Mini Ultrasonic Levitation Kit Is An Exercise In Sound Minimalist Design

For those that haven’t heard, ultrasonic levitation is a process by which two or more ultrasonic transducers are set opposite to each other and excited in such a way as to create a standing w…

Neodriver Ornament Brightens Up Christmas

Stores will sell you all kinds of gaudy holiday ornaments, but there’s nothing like the style and class achieved by building your own. [w3arycod3r] did just that, whipping up the fun and fest…