This video explains how to use the 16 channel PWM controller TLC5940
The CODE:
//Texas Instruments TLC 5940 with Arduino //www.kevindarrah.com #include <SPI.h>//Serial Peripheral Interface Library byte ch=0, chbit=0, spibit=0, spibyte=0;// variables used by tlc sub routine int SINData;//variable used to shift data to the TLC byte transferbyte[48];// bytes that are sent out to the tlc5940 via SPI // 48 because 16 channels @ 12bits gives 384bits, 384/8 = 48 bytes, 12 bit to 8 bit conversion byte DCvalue[32];//0-63, 6 bit DOT Correction Bytes int i, j, k, l,m,n; //misc variables int green, oldgreen= 2048;//for random animation int red, oldred = 2048;//for random animation int blue, oldblue = 2048;//for random animation int comeback=0, pick_color=0;//for random animation //******************************************************************************************* //******************************************************************************************* void setup(){// MAIN SETUP MAIN SETUP MAIN SETUP MAIN SETUP MAIN SETUP pinMode(2, OUTPUT);//XLAT pinMode(3, OUTPUT);//OSC2B GSCLK pinMode(4, OUTPUT);//VPRG pinMode(11, OUTPUT);//MOSI DATA pinMode(13, OUTPUT);//SPI Clock //Set up the SPI SPI.setBitOrder(MSBFIRST);//Most Significant Bit First SPI.setDataMode(SPI_MODE0);// Mode 0 Rising edge of data, keep clock low SPI.setClockDivider(SPI_CLOCK_DIV4);//Run the data in at 16MHz/4 - 4MHz for(i=0; i<48; i++)//clear out Gray Scale Data transferbyte[i]=0; for(i=0; i<32; i++)//set Dot Correction data to max (63 decimal for 6 bit) DCvalue[i]=63; Serial.begin(115200);//debugging? //set up DOT Correction DotCorrection();// sub routine helps noInterrupts();// set up the counters, so don't go into interrupts TCCR2A=B00010010;//Timer 2 set to Compare Mode Toggling pin 5 @ 8MHz, Arduino Digital 3 // TIMER 2 IS GSCLCK //Timer 2 prescaler set to 1, 16/1=16 MHz, but toggles pin 5 every other cycle, 8MHz TCCR2B=B00000001;
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