bcard is an experimental attempt to make cheap electronic business card on a thin PCB. The main goals are for it to be:
- not gaudy
- not stupid
My design incorporates a capacitive touch sensor with some blue LEDs around the corners. The blue LEDs are actually mounted upside-down so that the card fluoresces.
Cost of parts is about $1.80 in quantities of 25 (at Digi-Key prices). At quantities of 100, the cost per board is $1.54. The majority of the cost is in the 4 LEDs and the microcontroller. You can shave off a few cents by going with an ATTiny4 instead of an ATTiny10.
IDK, it's cute.