Plotting character sets to the Neo_Pixel Service.

Numbers can be fitted into a 4x5 (with a little flare) matrix, so here is a simple set based in Python to get you going.

Worthy of note is Python has a triple """ option for text declaration, which means you can include new lines in the text input, so I was able to separate the character bitmaps to some degree.

Usage :-

charPlot(1,12,11,255,0,0) # character number,positionx,y and colour r,g,b

Numeric Character Mapping 4x5

import math
port = "COM15"
pin = 3
pixelCount = 216
# starting arduino
arduino = Runtime.start("arduino","Arduino")
arduino.connect(port)
# starting neopixle
neopixel = Runtime.start("neopixel","NeoPixel")
neopixel.setPin(pin)
neopixel.setPixelCount(pixelCount)

# attach the two services
neopixel.attach(arduino)

def XYCircle(radx,rady,r,g,b):    #Test code for drawing circle
for pie in range(0,359,6):
y=9+(rady(math.cos(math.radians(pie))))
x=9+(radx(math.sin(math.radians(pie))))
XYtoPixel(x,y,r,g,b)

def XYtoPixel(x1,y1,r,g,b): #supply x,y, and rgb colour
x1=int(x1)
y1=int(y1)
z = x1 & 1       #test odd or even column
if z == 0 :     #Even colum
   i = 16 * (16 - (x1+1))+y1
else :           #odd column
   i = 16 * (16 - x1) - (y1+1)
neopixel.setPixel(int(i),r,g,b)

def charPlot(CC,x,y,r,g,b): # bitmap,x/y coords and colour
for i in range(0,5):
for j in range(0,4):
     if (bitstream[1+(21CC)+((i4)+(3-j))]=="1") :
       XYtoPixel(x+j,y-i,r,g,b)
     else :
       XYtoPixel(x+j,y-i,0,0,0)

bitstream = """
01101001100110010110
01101110011001101111
01110001111111001111
01100010111100111111
11011101111100110011
11101000111100111111
11001100111110011111
11111111001100110011
11101010111010011111
11111011111100110011
00000000000001100110
01100110000001100110
"""
charPlot(0,12,11,255,0,0)
charPlot(1,12-4,11,0,255,0)
charPlot(2,12-4-4,11,0,0,255)

charPlot(3,12,5,255,255,0)
charPlot(4,12-4,5,0,255,255)
charPlot(5,12-4-4,5,255,255,255)
print("finish")

To display int(number), some optional formating code.

number=123
strNumber=str(number)
for ns in range(0,len(strNumber)):
chord=(ord(strNumber[ns])-48) #get the ascii value-48 will put digit into 0 to 10 range for direct extraction from data table
charPlot(chord,12-((4*ns)),11,255,0,0)