I'm planning an artwork that uses the Arduino (Duemilanove ATMega328) to control its LED lighting in six areas. I can do this easily with standard single LED's, however this one is going to need much more light ...
So I've been working through Google & the forum to see how I might control some LED strips perfect for the task (each +12v, ~250mA) from the Arduino PWM pins via the ULN2003A Array.
I have a reasonable idea of how the sketch will look and 90% of the concept & information etc wrt the Darlington Array.
Where I'm stuck is with the schematic - specifically how to connect these particular LED strips. Heres' the LEDs datasheet http://www.hebeiltd.com.cn/led.strip/STR2-16R-40.pdf The below schematic is similar & is from an earlier post by Makkan (thanks):
It looks close, but the LED strips I have provide only a +ve and a -ve connection, so this is where my limited experience in circuits and electronics has left me hanging ;)
- My final goal is to use the Arduino to control each fade routine independently on six of these LED strips at the same time.
- Power supply: The strips can be daisy chained together to run off the same 12vdc transformer as long as the amperage is sufficient, but my gut tells me maybe not in this case, due to wanting them to fade independently? If it were possible to safely power the Arduino and all six boards from one source, that would be a huge bonus!
Any help much appreciated and will be acknowledged :) Many thanks!