URU Card is a spin-off project of the URU Key. It's a small, credit-card size FIDO2 Authenticator device. It's open-source, both hardware and software. It's wireless. It's built using simple and affordable components. It's programmed with Arduino.Excited?...
This widget is intended as a somewhat cheeky response to Hackaday’s 555 contest. You've likely come across many different timer or alarm based circuits in the past, possibly even ones featuring 555’s to some extent. This timer of timer’s is somewhat...
Tom's sound system is a Sparkfun MP3Trigger and a Sure 2x2 AMP. Both of these components have a small enough footprint to store inside the Money Lover's Barrel that makes up his torso.
Schematic is pretty simple: look up the datasheets for the involved IC's and combine; it's really that simple. Up next for the TLC: arduino tone activation via the keypad inputs.