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Found 2 results

  1. All, I spent a couple of hours trying to control a PMODDPOT with an Arduino Duemilanove this afternoon. A sketch of my wiring is attached. The code that I am working with is below. Is it obvious to you guys what I am doing wrong here? (NOTE: Vcc is 5.2V). NOTE: I have some experience with arduino but this is my first project that uses SPI. Thanks in advance for your help. #include <SPI.h> static byte i; const int slaveSelectPin = 10; void setup() { // put your setup code here, to run once: pinMode(slaveSelectPin, OUTPUT); SPI.begin(); Serial.begin(9600); } void loop() { // put your main code here, to run repeatedly: i++; // have tried 14000000,1400000,140000,14000 for SpeedMaximum // (i.e the first parameter to SPISetup) // have tried SPI_MODE0 thru SPI_MODE3). // have tried both LSBFIRST and MSBFIRST SPI.beginTransaction(SPISettings(14000,MSBFIRST,SPI_MODE0)); digitalWrite(slaveSelectPin, LOW); SPI.transfer(i); digitalWrite(slaveSelectPin,HIGH); SPI.endTransaction(); delay(500); if(i>254){ i=0; } Serial.println(i); }
  2. Hello all, I'm looking for a digital potentiometer of a style similar to PmodDPOT but with greater resolution than 8 bit. This is the best I could find http://www.mouser.com/ds/2/690/pmoddpot_rm-846147.pdf Please let me know if it exits Many thanks