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# Rainbowduino Extension Board v0.9b

Rainbowduino Extension Shield is a breakout board of Rainbowduino’s 192 separate LED driving channels. The channels are divided into three 8*8 arrays: red, green and blue for easier controlling, it is designed to ease customized LED projects based on Rainbowduino.

NOTE: To drive Rainbowduino Extension Board, you may also need a Rainbowduino .

Model: INT111A4M

## Features¶

• 60.33mm×180.61mm(3 multiple of Rainbowduino’s size)

• Can drive 192 separate LEDs

• No extra junctions needed

• Direct plug in Rainbowduino

• 8×24 LED matrix

• drive Ext LEDs

## Application Ideas¶

• create scroll message

## Cautions¶

Remember that the LED’s positive must be connected to the octagonal pad. The extension board’s quadrate pin should be plugged to the first pin rabbet. On the contrary, the LEDs will not shine, neither damaged.

## Usage¶

Rainbowduino Extension Shield is the breakout board of Rainbowduino, It can easily control 192(8×24) LEDs. It can also solder LEDs out of board. LED is upwards, and its back is the place to solder the pins.

### Hardware Installation¶

• 1.solder pin headers and LED correctly
• 2.plug in Rainbowduino

### Programming¶

The Demo code for details is linked here, please look it up if needed.

### Example¶

Rainbowduino Extension Shield is used to bright the LEDs in different patterns. The code below is able to control G10 and R31 to shine gradually as an example. You can change the style simply by modifying the parameter value of dots_color array. The first element can choose the matrix in different color; the last two parameters are used to define which one need to shine in row & column value.

  1 2 3 4 5 6 7 8 9 10 11 12 void _main(void) { _init(); unsigned char i=0; for(;;) { dots_color[0][0][0]=i<<4;//high 4bit G8 dot dots_color[1][0][3]=i&0x0f;//low 4bit R1 dot i++; delay(100); } } 
The effect is:

Actually 1 byte is used to control two LEDs, the theory for details is as follows:

  1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 unsigned char dots_color[3][8][4]= { //===================================================== {//green debug {0x00,0x00,0x00,0x00},//G8,G7,G6,G5,G4,G3,G2,G1 every dot has 4 bit color {0x00,0x00,0x00,0x00},//G16,G15,G14,G13,G12,G11,G10,G9 every dot has 4 bit color {0x00,0x00,0x00,0x00},//G24,G23,G22,G21,G20,G19,G18,G17 every dot has 4 bit color {0x00,0x00,0x00,0x00},//G32,G31,G30,G29,G28,G27,G26,G25 every dot has 4 bit color {0x00,0x00,0x00,0x00},//G40,G39,G38,G37,G36,G35,G34,G33 every dot has 4 bit color {0x00,0x00,0x00,0x00},//G48,G47,G46,G45,G44,G43,G42,G41 every dot has 4 bit color {0x00,0x00,0x00,0x00},//G56,G55,G54,G53,G52,G51,G50,G49 every dot has 4 bit color {0x00,0x00,0x00,0x00} //G64,G63,G62,G61,G60,G59,G58,G57 every dot has 4 bit color }, //======================================================= {//red debug {0x00,0x00,0x00,0x00},//R8,R7,R6,R5,R4,R3,R2,R1 every dot has 4 bit color {0x00,0x00,0x00,0x00},//R16,R15,R14,R13,R12,R11,R10,R9 every dot has 4 bit color {0x00,0x00,0x00,0x00},//R24,R23,R22,R21,R20,R19,R18,R17 every dot has 4 bit color {0x00,0x00,0x00,0x00},//R32,R31,R30,R29,R28,R27,R26,R25 every dot has 4 bit color {0x00,0x00,0x00,0x00},//R40,R39,R38,R37,R36,R35,R34,R33 every dot has 4 bit color {0x00,0x00,0x00,0x00},//R48,R47,R46,R45,R44,R43,R42,R41 every dot has 4 bit color {0x00,0x00,0x00,0x00},//R56,R55,R54,R53,R52,R51,R50,R49 every dot has 4 bit color {0x00,0x00,0x00,0x00} //R64,R63,R62,R61,R60,R59,R58,R57 every dot has 4 bit color }, //====================================================== {//blue debug {0x00,0x00,0x00,0x00},//B8,B7,B6,B5,B4,B3,B2,B1 every dot has 4 bit color {0x00,0x00,0x00,0x00},//B16,B15,B14,B13,B12,B11,B10,B9 every dot has 4 bit color {0x00,0x00,0x00,0x00},//B24,B23,B22,B21,B20,B19,B18,B17 every dot has 4 bit color {0x00,0x00,0x00,0x00},//B32,B31,B30,B29,B28,B27,B26,B25 every dot has 4 bit color {0x00,0x00,0x00,0x00},//B40,B39,B38,B37,B36,B35,B34,B33 every dot has 4 bit color {0x00,0x00,0x00,0x00},//B48,B47,B46,B45,B44,B43,B42,B41 every dot has 4 bit color {0x00,0x00,0x00,0x00},//B56,B55,B54,B53,B52,B51,B50,B49 every dot has 4 bit color {0x00,0x00,0x00,0x00} //B64,B63,B62,B61,B60,B59,B58,B57 every dot has 4 bit color }, }; 

Another effect picture displayed as the character RGB here, and the code for details is linked on the depot page.

## Support¶

If you have questions or other better design ideas, you can go to our forum or wish to discuss.

## Version Tracker¶

Revision Descriptions Release
v0.9b Initial public release Sept 23, 2010