LED/Keyboard Modules from DealExtreme
- I came across these modules on the DealExtreme web site. http://dx.com/p/8x-digital-tube-8x-key-8x-double-color-led-module-81873For 6.99(!) you get 8 seven segment displays, 8 leds that can be red or green and 8 switches. They run on 5 volts and you control them over a two wire connection with a protocol that's more-or-less SPI. You can read the state of the buttons and set all the leds and segments individually. They come with connectors at either end and a section of ribbon cable that you can use to daisy chain them with each one being individually controlled. Unbelievable value and quite reto looking although I can't really think of what the original purpose was.I hooked one up to the olduino, stole some code from an arduino library and voila: blinkenlights. I posted a video and the code on the olduino web site. You can get a look at the (somewhat clunky) inline assembler.http://olduino.wordpress.com/2013/02/13/olduino-and-tm1638-led-module/I would still be playing with this thing except I want to nail down the bithday version of the compiler before I move on to my next hardware target - An Ethernet adapter.