HiIt's possible, just depends on the amount of control you want. Most LED strips that I've seen split into 5cm, 3 LED strips as you've said. Each 5cm/3LED strip can be powered individually, but each LED can't unless you hack the strip apart.Are you planning on using 16 strips of 3-LEDs for each side?Do you want to control the whole triangle, a side or each 5cm strip?I'm using 2 TLC5940s to control 32 x 30cm LED strips, each 5cm strip is 20ma, so 120ma for mine, per channel. The TLC can do this just fine.If you want exactly the same on both triangles (if using 16 x 5cm Strips controlled individually) I'd use 3 TLC5940 running 2 strips per channel, the same one from each triangle.
A way to control the LED strips is to connect all their +12s together to a +12V source, and use a ULN2003ULN2803 as a high voltage/current buffer to control their grounds from Arduino pins.If you need more outputs, then use a TPIC6B595 shift register to combine a shift register and ULN2803 function together.
Okay, this is what I am talking about.I would use 3 'channels' like this, then you can play a little with the display.
So you just want the triangles to flash? Not knight-rider etc?
Yes, just use 3 more outputs wired up thru the ULN2003.
How would it knight-rider if you're not having individual connections?Your options are:-A) Control the entire triangle, all on, all off etc.B) Control each side of the triangleC) Control each section of the LED StripThis can easily be replicated for both triangles by just connecting the VCC or GNDs together, depending on which method you use.IMO, and after much research, the TLC option is much easier for the kind of setup in C) , though a little more expensive (unless you get free samples). 2 TLCs give you 32 outputs, you only need 24. As they provide PWM it's much easier to get a knight-rider effect, there are even examples built into the library to do it.Set the resistor to 40ma, provide 12v to the strips and hook the grounds into the TLCs.Note: You will need to separate the grounds of the LED strips and solder on some wires to connect to the TLC.You could also use a universal remote, the IR library is very good. I managed to get 4 relays controlled for a universal remote set to Sony codes, so can't see why you couldn't cycle through some preset animations.http://www.arcfn.com/2009/08/multi-protocol-infrared-remote-library.html
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