arduino PWM - Pulse Width Modulation PWM with a TLC5940
Example
The TLC5940 is a handy item to have when you run out of PWM ports on the Arduino. It has 16 channels, each individually controllable with 12 bits of resolution (0-4095). An existing library is available at http://playground.arduino.cc/Learning/TLC5940. It is useful for controlling multiple servos or RGB LEDs. Just keep in mind, the LEDs must be common anode to work. Also, the chips are daisy-chainable, allowing even more PWM ports.
Example:
// Include the library
#include <Tlc5940.h>
void setup() {
// Initialize
Tlc.init();
Tlc.clear();
}
unsigned int level = 0;
void loop() {
// Set all 16 outputs to same value
for (int i = 0; i < 16; i++) {
Tlc.set(i, level);
}
level = (level + 1) % 4096;
// Tell the library to send the values to the chip
Tlc.update();
delay(10);
}
