I tried recently to get one of these http://www.bliptronics.com/item.aspx?ItemID=128
led strips working with an arduino.
Had no joy, having followed the instructions using sample code on that page, and http://www.sparkfun.com/datasheets/Components/LED/LED_Strip_Example.pde
. All that happens is the first led in the strip flashes, and only when the ground from the 5v supply is not linked to arduino ground.
At the same time I got some of these http://www.bliptronics.com/
item.aspx?ItemID=110 which use the LPD6803 and they worked fine with the sample code provided.
Since then I got a strip similar to this http://www.adafruit.com/products/322
along with a controller someone had made using an mbed NXP LPC1768. This came pre wired and worked straight out of the box (artnet dmx control built in - really nice) and I though I'd have a go at controlling that strip using an arduino. No joy, same problem as above. I wired the string back up the the mbed controller and now it doesn't work either!
First thoughts are probably that I've connected the power up incorrectly and blown something but I've been really careful and am pretty sure I haven't done this. I noted the wires used for power on the (working) setup with the mbed and made sure to use the same (apparently it's fairly common for the cable colours to change between batches of these led strips) with the arduino.
I'm a little confused as most people seem to have a really easy time getting these to work and I'm not really sure how to troubleshoot further. It's a little worrying that I seem to have broken the new strip, as I have no idea how that might have happened. Does anyone have an idea of how to troubleshoot from here?
Here is the last setup I tried -Strip <-----> Arduino
SDI <-----> Pin 2
CKI <-----> Pin 3
GND <-----> GNDStrip <-----> 5v power supply
GND <-----> GND
5v <-----> 5v
Using the sketch here - http://www.sparkfun.com/datasheets/Components/LED/LED_Strip_Example.pde