0

I need some help about my current project. I am trying to do a voltage source which can be controlled remotely(0V-20V). I am using LM317T for this project. I examined the LM317T datasheet and designed a circuit for a 10k potentiometer.enter image description here

After setting up the circuit, I tried the circuit with the analog 10k potentiometer and the results were fine.( I get 1.25 V to 19.5 V). After that I have tried to control X9C103 with Arduino UNO and again the results were fine. Here the codes.

#include <FastX9CXXX.h>
#define X9_CS_PIN 3
#define X9_UD_PIN 4
#define X9_INC_PIN 5

FastX9C103 Potentiometer;
String readString = "";


void setup() {
  Serial.begin(9600);
  Serial.println();
  Serial.println(F("ESOGU Uzaktan Laboratuvar"));
  Serial.print(F("Digital Potentiometer Application..."));
  randomSeed(analogRead(0));
  //Potentiometer.Begin();
  Potentiometer.Setup(X9_CS_PIN, X9_UD_PIN, X9_INC_PIN);
  Serial.println(F(" Completed."));

 }

void loop() {
  //Potentiometer.JumpToStep(random(100));
  Serial.print(F("Potentiometer (%): "));
  Serial.print(Potentiometer.GetStep(), DEC);
  Serial.println();
  delay(1000);    // wait for a second

     if (Serial.available() > 0) {
       readString="";
       while (Serial.available()) { // gelen komutu alıyoruz
       char c = (char)Serial.read();
       readString += c;
     }
     Potentiometer.JumpToStep(readString.toInt());
     }
 }

But after implementing digital potentiometer to my circuit. I didn’t get the results that I want. I got 1.5 V to 7 V. The circuit is working perfectly fine with analog 10k potentiometer but not with 10k digital potentiometer. Thank you for your answers.

Changed status to publish