Week 3 Lab

from Electronic Technologies for Art

Contents

Analog Input

• File->Sketchbook->Analog->AnalogInput

 val = analogRead(potPin);    // read the value from the sensor

• Potentiometer

• • Question: What will the Voltage at V_IN be? What are the upper and lower voltages that will be measured?
  • Question 2: Looking at the help for the analogRead() function, what will the value val be for those highest and lowest voltages?

• photo-resistor
• strain gauge

Analog Output

LED Dimming

• File->Sketchbook->Examples->Analog->Fading

   analogWrite(ledpin, value);           // sets the value (range from 0 to 255) 

PWM (pulse width modulation)

• lights, fading

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Motor Speed Control

• Basic motor control (DC motors) see week 5

Sound, Tone Generation

• sounds, tone generation