Pixel to LED, the best way to do it?

    bjoerndamlarsen
    May 03 2013 | 5:28 pm
    Hey everybody im currently working on an art installation and I have to figure out how to send packets (containing LED nr, R, G, B) through the serial object in Max msp. I have problems figuring out how to send many packets through the serial object relatively fast.
    I have an arduino code which read the data from Max Msp and sends data to an adafruit RGB LED string (LP8806) with 120 LEDs, see the attached.
    I want jit.spill to turn on LEDs with 1 and turn them off with 0!
    How can I go through the list of 0´s and 1´s and send the packet through the serial object- In a fast way
    see the attached max msp file and feel free to change something in the arduino code if you know!
    • Nat
      May 03 2013 | 6:21 pm
      Did you try the iter object ? Alternatively perhaps going directly to the serial with jit.iter ?
      Also the actual message object you use takes a lot of juice, were you planning on leaving it in the patch ?
    • Wetterberg
      May 03 2013 | 6:29 pm
      Hi Bjoern (Danish?) - I'll point you towards Gav's thread, since he recently built a big project around just this process.
      Are you sure you want to simply turn them on or off? You *could* do pwm on the LEDs and have actual brightness levels for them...
      https://cycling74.com/forums/jit-iter-for-driving-rgb-leds