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NeoPixel 16x16 Matrix

These samples uses NeoPixel. NeoPixel is an addressable LED that actually contains 3 LEDs, RED, GREEN, and BLUE. These three LEDs combine to make just about any color. NeoPixel come in many different configurations, from 1 single NeoPixel to panels containing many. DUE allows for up to 256 NeoPixel. This is perfect for a 16x16 setup.

NeoPixel Matrix

Hardware:

  • Any device supporting DUE-Script
  • NeoPixel 16x16 Matrix with zig-zag matrix configuration

Set-up:

  • Connecting the panel is easy, we just need to connect three wires POWER, GND, and DATA to control all the LEDs. On the back of most NEOPixel panels are 3 sets of cables connected to the panel.

NeoPixel Wiring

OUT: connector is used to connect panels together.

POWER: is used to connect 5V external power source to the panel. This is often necessary when using many LEDs.

IN: connector is where we connect our hardware to the NeoPixel. We connect PIN 1 DUE enabled hardware to the wire labeled DIN, in this case the wire is the green wire.

Add a picture frame:

We took 2 5x7" picture frames and connected the longer ends together to make a picture frame to hold our NeoPixel. We even used the back of the picture frames as a built-in stand.

NeoPixel Frame

Sine wave

Sine wave

This sample shows a sine wave scrolling along the matrix

# NeoPixel - Moving sine wave
h=16:w=16
z=3.1415926/6
i=0
@loop
    NeoClear()
    for x=0 to 15
        y = 8+sin((x+i)*z)*6
        pxl()
        NeoSet(p,0,128,0)
    next
    NeoShow(0,256)
    i=i+1
goto loop

# Formula for index into 16x16 NeoPixel Matrix
# p=pxl(x,y)
@pxl
    p = x*w+(x&1)*(w-1)+(1-2*(x&1))*y
return

Colorful sine wave

Color sine wave

This sample shows a colorful sine wave scrolling along the matrix

# NeoPixel - Colorful Moving sine wave
h=16:w=16
i=0
z=3.1415926/6
@loop
   NeoClear()
     for x=0 to 15
         d = x+i
         y = 8+sin(d*z)*6
         pxl()
         NeoSet(p,128,0,0)

         y = 8+sin((d+1)*z)*6
         pxl()
         NeoSet(p,0,128,0)

         y = 8+sin((d+2)*z)*6
         pxl()
         NeoSet(p,0,0,128)
      next
   NeoShow(0,256)
   i=i+1
goto loop

# Formula for index into 16x16 NeoPixel Matrix
# p=pxl(x,y)
@pxl
    p = x*w+(x&1)*(w-1)+(1-2*(x&1))*y
return

Rainbow

Rainbow

This sample shows a colorful rainbow

# NeoPixel - Rainbow
h=16:w=16
z=3.1415926/15
NeoClear()
for x=0 to 15 
  for i=4 to 8
    y = i+sin(x*z)*6
    pxl()
    if i%5=0:NeoSet(p,0,0,128):end
    if i%5=1:NeoSet(p,0,128,0):end
    if i%5=2:NeoSet(p,0,128,128):end
    if i%5=3:NeoSet(p,128,0,0):end
    if i%5=4:NeoSet(p,128,0,128):end
  next
next
NeoShow(0,256)
exit

# Formula for index into 16x16 NeoPixel Matrix
# p=pxl(x,y)
@pxl
    p = x*w+(x&1)*(w-1)+(1-2*(x&1))*y
return
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