After a while I thought about a coin, that he could use as a gift badge. I decided to make this coin out of a copper pcb. I liked to etch some text out of it. Then I saw an old and broken cooling fan lying on my desk and remembered that I had some high power RGB LED in my parts collection.
After some search in the Internet I decided to build an ambilight device with the etched coin backlit by the RGB LED.
I was somehow limited to the microprocessor. I had an spare ATTiny13, and did not want to use to much control buttons. Everything should be simple. I found this software http://www.loetstelle.net/projekte/moodlight/moodlight.php . Markus used an ATTiny12, but it was easy to adapt his code to the ATTiny13.
Step 1: Parts needed
- I found some insulation material inside the broken power supply.
- A heat sink taken from an old motherboard fits into the case, if the edges are cut a little bit.
- Some time ago I bought a rubber cap for push buttons from DealExtreme.
- The ATTiny13 (or ATTiny12).
- some resistors and capacitors
- some small wires
- a small push button
- silicone paste to mount the RGB-LED onto the heat sink
- a small 5V power supply (a 3V coin cell battery may do as well ... for some time)
- old pingpong ball
- some acrylic
- etching pcb's
- the ability to etch pcb's
- plastic spray, PLASTIK 70, to seal the badge
- tools like soldering iron, pliers, screwdrivers ...