Digital Potentiometer Module - X9C103S

This is DC 3-5V X9C103S Digital Potentiometer Board Module for Arduino. The X9C103 are digitally controlled (XDCP) potentiometers. Digital Potentiometer consists of a resistor array, wiper switches, a control section, and non-volatile memory. The wiper position is controlled by a three-wire interface. The potentiometer is implemented by a resistor array composed of 99 resistive elements and a wiper switching network. Between each element and at either end are tap points accessible to the wiper terminal.

Features

• Digitally controlled potentiometer
• Consists of a resistor array, wiper switches, a control section, and non-volatile memory
• Wiper position is controlled by a three-wire interface
• Contains resistor array composed of 99 resistive elements and a wiper switching network to achieve variable resistance
• Between each element and at either end are tap points accessible to the wiper terminal
• Position of the wiper element is controlled by the CS, U/D, and INC inputs
• Position of the wiper can be stored in non-volatile memory and then be recalled upon a subsequent power-up operation
• Can be used as a three-terminal potentiometer or as a two-terminal variable resistor
• VL and VH digital potentiometer sliding rheostat port corresponding to the low-end and high-end, allowing the input voltage range -5V to + 5V

Specifications

1. Operating Voltage: 3V – 5VDC
2. Chipset: X9C103S
3. Board Dimensions: 27mm x 13mm
4. Center Tap Resistance Range: 0 to 10K Ohm
5. Impedance: 40 Ohm

Package included

• 1 x X9C103S Digital Potentiometer Module

Pins

• Output VH, RW, VL
  Potentiometer outputs, maximum voltage via potentiometer 10V, current 8mA
• Input U / D: UP / DOWN
  Depending on the status of this input, the slider of the resistor moves up or down
• Input INC: INCREMENT
  Control of the slider, when the input changes state from 1 to 0, the slider of the potentiometer makes one step, the principle of operation as in a hardware interrupt
• Input CS: DEVICE SELECT,
  Select the device, so that the chip starts accepting commands, you need to submit a logical 0

#define UD  2                          // OUTPUT
#define INC 3
#define CS  4

void up(){
  digitalWrite(UD, HIGH);
  digitalWrite(INC, HIGH);
  digitalWrite(CS, LOW);              // turn on the microcircuit
  delayMicroseconds(1);
  digitalWrite(INC, LOW);
  delayMicroseconds(1);
  digitalWrite(INC, HIGH);
  delayMicroseconds(1);
///digitalWrite(INC, LOW);            // in this case the position of the slider is not written
  digitalWrite(CS, HIGH);             // turn off the chip and write the position in the EEPROM
}

void down(){
  digitalWrite(UD, LOW);
  digitalWrite(INC, HIGH);
  digitalWrite(CS, LOW);
  delayMicroseconds(1);
  digitalWrite(INC, LOW);
  delayMicroseconds(1);
  digitalWrite(INC, HIGH);
  delayMicroseconds(1);

  digitalWrite(CS, HIGH);
}

void setup() {
  Serial.begin(9600);

  pinMode(INC, OUTPUT);
  pinMode(UD, OUTPUT);
  pinMode(CS, OUTPUT);
  digitalWrite(CS, HIGH);                         // turn off the microcircuit
}

void loop() {

  if (Serial.available()) 
     if (Serial.read() == '0'){
      down();
      Serial.print("-1");
     }
     else {
      up();
      Serial.print("+1");
     }
   
  }
 

}

Coding source: arduinolab.pw