These cards plug into a USB port for power and have over a dozen small LEDs that light up the stars on the front, and a small buzzer that can play over ten minutes of cracktro music. To keep the cost down, [VCC] went with an ATtiny1616 microcontroller costing under 50 cents and still having plenty of outputs to drive the buzzer and LEDs. The final per-unit cost prior to shipping came out to only 1.5 euros, enabling them to be handed out without worrying about breaking the bank.
To aid in the assembly of the cards, [VCC] 3D printed a jig to apply material to the back of the USB connector, building up its thickness to securely fit in the USB port. He also wrote a small script for assembly-line programming the cards, getting the programming process down to around ten seconds per card and letting him turn through prepping the cards. Thanks, [VCC], for sending in your project—it’s a great addition to other PCB business cards we’ve featured.
Ohhh… It has been a while since I last heard these amiga/c64. How did they fit in the attiny161 16k of program+data ?
I had to use a 4 channel chiptune routine – it is not mp3 or wav, but a real old style chiptune, similar to the ones we did when all that we had was 8kb ram.
Love it! But ask any random business person to plug anything from a stranger into their computer’s USB port….
The design shows clearly only two tracks (+ and -) are used, no data line – which make hacking impossible. The visible lack of power components makes “usb killer” impossible too.
But next version will use an usb-c socket but a one side only assembly- it is chaperon than pcb usb and double side assembly.
I guess ‘business people’ are too serious to have ever taken notice to a mains powered 5v power supply?
Or a battery bank?
That said, maybe this day and age its time to move on to USB-C.
Also, a nitpick but, ‘cracktro music’? Thats a pretty tiny slit in the door, what about songs from Demos, or Keygens, or Musicdisks?
This genre has a name, chiptunes.
A lot of people will do it, attacks via USB driives scattered in parking lots have worked.
(from that chap’s site)
er not exactly as during 90s we used ‘paper’ cards…