looking at the SPI DigiPot turorial in http://arduino.cc/en/Tutorial/SPIDigitalPot
there's this line of code here:
void loop() {
// go through the six channels of the digital pot:
for (int channel = 0; channel < 6; channel++) {
// change the resistance on this channel from min to max:
for (int level = 0; level < 255; level++) {
digitalPotWrite(channel, level);
delay(10);
}
// wait a second at the top:
delay(100);
// change the resistance on this channel from max to min:
for (int level = 0; level < 255; level++) {
digitalPotWrite(channel, 255 - level);
delay(10);
}
}
}
is it necessary to go through all six channels or can i use just one or two channels?
the way i'm visualizing my circuit i won't need all the other channels.
i am planning to design a current sensor/reader using the digital potentiometer, btw.
