Overview

Input devices are devices that take in input/information send it to a microcontroller so it can process it and make decisions. There are different types of input devices that detect different things (ex: touch, temperature, distance, etc).

Input devices either give Analog (range of values) or Digital (1 or 0) signals.

Touch Sensor

I connected a touch sensor to the pcb i made in Week 8

Here is the touch sensor:

What to connect where:

SIG -> GPIO6 (purple wire)

VCC -> 3V3 (red wire)

GND -> GND (black wire)

Blink code:

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void setup() {
  pinMode(6, INPUT);
  pinMode(2, OUTPUT);

  digitalWrite(2, LOW);
}

void loop() {
  if (digitalRead(6) == HIGH){
    digitalWrite(2, HIGH);
  }
  else{
    digitalWrite(2, LOW);
  }
}

Explanation of the Code:

• setup() function runs once when the Arduino powers on.
• pinMode(6, INPUT) -> Sets pin 6 as an input. This is where we read signals from (ex. a button).
• pinMode(2, OUTPUT) -> Sets pin 2 as an output. This is where we send signals to (ex., turning on an LED or motor)
• digitalWrite(2, LOW) -> Initializes the output on pin 2 to LOW (off) at the start.
• The loop() function runs continuously.
• The if statement reads state of pin6 and if it is high (sensor touched) it sets pin 2 to HIGH (turns LED on)
• Otherwise (if pin 6 is LOW), the output is turned off.

Video:

Group Assignment

Here is our group assignment link