A golden Jolly Wrencher SAO that works as an NFC tag for sharing contact info.

2024 SAO Contest: The Jolly Tagger Is A Golden Way To Share Info

September 19, 2024 by Kristina Panos 16 Comments

For this contest, we’re asking you to come up with the best SAO you can think of that does something cool. What could be cooler than sharing your contact information all over Supercon and beyond with a tap of a Jolly Wrencher? It’s way better than just some sticker, and with the extra solder pad on the back, you can turn it into a pin once the con is over. Contact data can be uploaded over I²C.

An antenna coil PCB trace as generated by a KiCad plugin. — The KiCad-generated coil.

Here, [Phil Weasel] seeks to answer the question of whether one can make a working NFC tag with the M24LR04E IC, using a PCB trace as a coil. If there is an issue, it’s probably going to be that copper plane inside the antenna.

Designing the antenna itself proved fairly easy after checking the datasheet for the internal tuning capacitance (~27.5 pF), verifying the frequency of NFC (~13.56 MHz), and doing the math to find the inductance needed. After confirming everything in LTSpice, [Phil] used a PCB coil calculator and let the KiCad coil generator draw it out.

Did we mention the Jolly Wrencher is backlit by four side-mounted LEDs? Because what’s an SAO without a few blinkenlights?

Meet The Winners Of The 2024 Tiny Games Contest

September 18, 2024 by Tom Nardi 12 Comments

Over the years, we’ve figured out some pretty sure-fire ways to get hackers and makers motivated for contests. One of the best ways is to put arbitrary limits on different aspects of the project, such as how large it can be or how much power it can consume. Don’t believe us? Then just take a look at the entries of this year’s Tiny Games Contest.

Nearly 80 projects made it across the finish line this time, and our panel of judges have spent the last week or so going over each one to try and narrow it down to a handful of winners. We’ll start things off with the top three projects, each of which will be awarded a $150 gift certificate from our friends at DigiKey.

First: Sub-Surface Simon

While this contest saw a lot of excellent entries, we don’t think anyone is going to be surprised to see this one take the top spot. Earning an exceptionally rare perfect ten score from each of our judges, Sub-Surface Simon from [alnwlsn] grabbed onto the theme of this contest and ran like hell with it. Continue reading “Meet The Winners Of The 2024 Tiny Games Contest” →

2024 Tiny Games Contest: Neat PCB Business Card Was Inspired By The Arduboy

September 13, 2024 by Lewin Day No comments

The humble business card is usually a small slip of cardboard with some basic contact details on it — but as hackers know, it can be so much more. [Marian] has provided us a great example in the form of his own digital business card, which doubles as a handheld game!

Wanting to make his business card more interesting for better engagement, [Marian] was inspired by the Arduboy to give it some interactivity. He chose the STM32G030F6 microcontroller as a cheap and reliable option to run his business card. He then created a 10×9 LED matrix display using Charlieplexing to minimize the amount of I/O pins required. For controls, he went with the usual directional cross plus two action buttons. He implemented a variety of games on the card—including a Flappy Bird clone and a game similar to the classic Simon toy.

Files are on GitHub for the curious. We’ve featured some other great business cards this year, too. Indeed, we ran a whole challenge! If you’re cooking up your own exemplary little PCB to hand out at conferences, don’t hesitate to let us know!

There’s Already A Nixie Addon For The 2024 Supercon Badge

September 12, 2024 by Lewin Day No comments

Nixie tubes are cool, and hackers like them. Perhaps for those reasons more than any other, [Kevin Santo Cappuccio] has developed a very particular Simple Add-On for the 2024 Hackaday Supercon badge.

The build began with a Burroughs 122P224 Nixie tube, and a HV8200 power supply. The latter component is key—it’s capable of turning voltages as low as 3 V into the 180V needed to power a Nixie. Then, an 18-position selector switch was pulled out of a resistance substitution box, and [Kevin] whipped up a basic DIY slip ring using some raw copper clad board.

Smoosh it all together, and what do you get? It’s a Nixie tube you can spin to change the number it displays. Useful? Hardly, unless you want to display varying glowing numbers to people at unreadable angles. Neat? Very. Just don’t touch any of the pins carrying 180 V, that’ll sting. Still, [Kevin] told us it’s pretty tucked away. “I’m totally comfortable touching it, but also would get sued into oblivion selling these on Amazon,” he says.

As [Kevin] notes in his post, the 2024 badge is all about the add-ons— and there’s actually a contest! We suspect [Kevin] will have a strong chance of taking out the Least Manufacturable title.

If you need more information about the Simple Add-On (SAO) interface, [Brian Benchoff] posted the V1.69bis standard on these very pages back in 2019. Apparently the S used to stand for something else. Video after the break.

Continue reading “There’s Already A Nixie Addon For The 2024 Supercon Badge” →

A Simon game built into an ATtiny84 in a DIP-14 package.

2024 Tiny Games Contest: Spectacular Sub-Surface Simon

September 12, 2024 by Kristina Panos 17 Comments

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 components.

[alnwlsn] is no stranger to the small, having worked almost exclusively with surface mount components for a few years now. Even so, they’ve built up an admirable stock of DIP chips, including the ATtiny84 DIP-14 that their incredible Simon game is built into.

How in the world did [alnwlsn] accomplish this? As you’ll see in the video after the break, the answer lies in milling, but with the motors disconnected and manually turning the knobs.

Soldering didn’t require anything special, just the usual suspects like a fine-tipped iron, an X-acto knife, some tweezers, and a few other things like a hot air gun for soldering fine wires to the leadframe. Oh, and of course, really steady hands, and lots of patience.

The 2024 Tiny Games Contest officially closed on Tuesday, September 10th. We’ll have the results out as soon as possible. Best of luck to all who entered!

Continue reading “2024 Tiny Games Contest: Spectacular Sub-Surface Simon” →

2024 Tiny Games Contest: A Flappy Seagull Game With Sound In Only 500 Bytes

September 12, 2024 by Dan Maloney 4 Comments

It was probably a reasonable assumption that the “Tiny” in our recently concluded Tiny Games Contest mostly referred to the physical footprint of the game. And indeed, that’s the way most of the entries broke, which resulted in some pretty amazing efforts. [Anders Nielsen], however, took the challenge another way and managed to stuff a seagull-centric side-scroller into just 500 bytes of code.

That’s not to say that the size of [Anders]’s game is physically huge either. Flappy Larus, as he calls his game, runs on his popular 65uino platform, a 6502 microcontroller in the familiar Arduino Uno form factor. So it’s pretty small to begin with, and doesn’t even need any additional components other than the tiny OLED screen which has become more or less standard for the 65uino at this point. The only real add-on is a piezo speaker module, which when hooked up to the I2C data line happens to make reasonable approximations of a squawking seagull, all without adding a single byte of code. Check out a little game play in the video below.

Flappy Larus may be pretty simplistic, but as we recall, the game it’s based on was similarly minimalist and still managed to get people hooked. The 2024 Tiny Games contest is closed now, but if you’ve got an idea for a tiny game, we’d still love to feature it. Hit the tip line and we’ll take a look! Continue reading “2024 Tiny Games Contest: A Flappy Seagull Game With Sound In Only 500 Bytes” →

A tiny colorful slot machine that uses LEDs instead of fruits or numbers.

2024 Tiny Games Contest: Micro One-Armed Bandit Hits The Cuteness Jackpot

September 11, 2024 by Kristina Panos 3 Comments

They don’t call slot machines one-armed bandits for nothing. And although it’s getting harder and harder to find slot machines with actual pull-able handles instead of just big buttons, you can easily simulate the handle at home with the right kind of limit switch, as [Andrew Smith] did with this micro slot machine.

This baby slot machine is built around the Adafruit 5×5 NeoPixel grid, which is an add-on for the QT Py. As you’ll see in the brief demo video after the break, the switch actuates on release, which starts the lights a-spinning. [Andrew] says the constraints of the SAMD21-powered QT Py made this a particularly fun challenge.

Whereas most physical slot machines have different reel sequences, this build uses just one. [Andrew] declared hex values to ID each color, and then created the reel manually with different color frequencies. When the lever is released, the columns are animated and slowly to come to rest at a random offset. You can check out the code on GitHub.

Continue reading “2024 Tiny Games Contest: Micro One-Armed Bandit Hits The Cuteness Jackpot” →