Inputs and Outputs

So, what are inputs and outputs?

Within the Arduino realm, an input is a device, or sensor, or pin that is ready to receive a stimulus or signal for processing by the Arduino microcontroller.

On the other hand, an output is a device, or sensor, or pin that will do something when it receives a signal from the Arduino microcontroller.

Investigate the following devices, and categorise them as either an input or an output.

• LED or Light Emitting Diode
• Servo Motor (A motor that can turn to a certain position)
• Pushbutton Switch
• Slide switch
• Temperature sensor
• Magnetic switch
• Rotary angle sensor/ Potentiometer (eg. volume dial)
• Touch sensor
• Sound sensor
• Light sensor (LDR)
• Buzzer
• Vibration motor