Week 3 Lab

from Electronic Technologies for Art

Analog Input

• File->Sketchbook->Analog->AnalogInput

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

• Potentiometer

• Question1: 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

<youtube v="62gWVWCyw_w" loop="true"/>

Motor Speed Control

• Basic motor control (DC motors) see week 5

Sound, Tone Generation

• sounds, tone generation