Congratulations To The 2024 Business Card Challenge Winners!

When you ask a Hackaday crowd to design a business card, you should expect to be surprised by what you get. But still, we were surprised by the breadth of entries! Our judges wracked their brains t…

2024 Business Card Challenge: The Gift Of Music

Has anyone ever told you that you just can’t carry a tune? If you were to be the lucky recipient of one of [Ayu]’s synthesizer business cards, well, then it really couldn’t be hel…

2024 Business Card Challenge: A Very Annoying Business Card, Indeed

Usually the business card itself is the reminder to get in contact with whoever gave it to you. But this is Hackaday, after all. This solar-powered card reminds the recipient to send [Dead Rat Prod…

2024 Business Card Challenge: Magnetic Fidget Card

If you want someone to keep your business card around, you should probably make it really cool-looking, or have it do something useful. It’s kind of the whole point of the 2024 Business Card …

2024 Business Card Challenge: A Battery Tester With Blinkenlights

Readers of a certain vintage will no doubt remember that for a brief time, some alkaline batteries came with a built-in battery tester. Basically, you just pushed really hard with your fingernails …

2024 Business Card Challenge: POV Fidget Keeps Your Info In Their Hands

So what if we’re halfway through 2024? People who needed to fidget all along still need something to do with their hands. So why not hand them a solution with your information on it? Not only…

2024 Business Card Challenge: Go Tic-Tac-Toe-to-Toe With Them

There is perhaps no more important time to have a business card than when you’re in college, especially near the end when you’re applying for internships and such. And it’s vital …

2024 Business Card Challenge: NoiseCard Judges The Sound Around You

Let’s face it: even with the rise of the electric car, the world is a noisy place. And it seems like it has only gotten worse in recent years. But how can we easily quantify the noise around …

2024 Business Card Challenge: Integrated Game Card

[Dan Schnur] has a simple strategy to ensure their business card stays on the client’s desk and doesn’t just get lobbed in a drawer: make it into a simple gaming platform. This entry in…

2024 Business Card Challenge: PCB Business Cards For Everybody

PCB business cards for electronics engineers might be very much old news in our circles, but they are still cool, not seen too much in the wild, and frankly inaccessible to those in other industrie…

2024 Business Card Challenge: BAUDI/O For The Audio Hacker

[Simon B] enters our 2024 Business Card Challenge with BAUDI/O, a genuinely useful audio output device. The device is based around the PCM2706 DAC, which handles all the USB interfacing and audio s…

2024 Business Card Challenge: T-800’s 555 Brain

In Terminator 2: Judgment Day it’s revealed that Skynet becomes self-aware in August of 1997, and promptly launches a nuclear attack against Russia to draw humanity into a war which ultimatel…

2024 Business Card Challenge: Make Them Shake Your Handiwork

Before COVID, people traditionally sealed their initial introduction to each other with a handshake. Nowadays, that activity seems kind of questionable. But you can still give them something to sha…

2024 Business Card Challenge: Weather Or Not You Get The Job

What’s the easiest way to break the ice with someone you’ve just met? If you’re not immediately talking shop, than it’s probably the time-tested subject of the weather. So w…

2024 Business Card Challenge: Who Do You Love?

When you hand your new acquaintance one of your cards, there’s a chance you might feel an instant connection. But what if you could know almost instantly whether they felt the same way? With …

2024 Business Card Challenge: Tiny MIDI Keyboard

The progress for electronics over the past seven decades or so has always trended towards smaller or more dense components. Moore’s Law is the famous example of this, but even when we’r…

2024 Business Card Challenge: Snakes On A Business Card

Once [Lambert the Maker] saw the Arduboy, he knew the thing was ripe for remixing into a business card with an 8×8 LED matrix instead of an OLED screen. [Lambert] already has a PCB business ca…

2024 Business Card Contest: A Game For Two

If you want to make a good first impression on someone, it seems like the longer you can keep them talking, the better. After all, if they want to keep talking, that’s a pretty good sign that…

The 2024 Business Card Challenge Starts Now

If you want to make circuits for a living, what better way to impress a future employer than to hand them a piece of your work to take home? But even if you’re just hacking for fun, you can still t…