Archive for December, 2009
How’s this for a class project! Based around a PIC32 Microcontroller and sporting a touchscreen interface, it allows the user to custom mix their own drinks or select one of the preset options programmed into it.
There’s also some clever use of RFID technology here as well. RFID tags embedded in the cups are used to match up users with their selections. Faster than you can say “Same again please, Bar Tender.” It’ll whip up your usual based on your previous choice.
Forget keypads and RFID tags, the guys over at alan-parekh.com have come up with the simplest possible user interface for a code entry system: a single button. Sold in kit form via their online store and incorperating a PIC 16F628A microcontroler and relay, this kit allows you to program and input a four-digit code using only one button.
Details and a video explaining how the kit works can be found here.
I needed an idea that I could use to teach myself about using a relay with Microcontrollers and solve that age old problem: Switching between speakers and headphones on my PC without having to actually get up and mess around in the rats nest of wire’s behind it.
The solution: Use a 5v DPDT relay, a few 3.5mm stereo sockets and an Ethernet-capable Arduino to create a simple audio switch which would allow me to switch one audio source (my PC’s Soundcard in this case) to one of two outputs (headphones or speakers) via a web interface running on the Arduino from the comfort of my web browser.