Reading a Potentiometer

Bongilcheon High School project to read a potentiometer.

AdvancedShowcase (no instructions)30 minutes858

Things used in this project

Hardware components

Breadboard (generic)

Arduino 101

LED (generic)

Resistor 100 ohm

Jumper wires (generic)

Rotary potentiometer (generic)

Story

Introduction

This experiment is simple, and in it, we are going to use "potentiometer".

Open the Arduino IDE software on your computer.

Coding in the Arduino language will control your circuit.

Open the code for Circuit 2 by accessing the “101 SIK Guide Code” you

Download and place into your “Examples” folder earlier.

To open the code go to:File > Examples > 101 SIK Guide Code > Circuit_02

Copy and paste the following code into the Arduino IDE. Hit upload, and see what happens!

Conclusion

You can see the blinking LED that faster or slower. It's because potentiometer is a variable resister. By spinning potentiometer, you can adjust the voltage. Then LED can blink faster or slower.

Point to note about potentiometer is if you use it in rough work, you should prepare ventilation system to cool the heat.

Following words are what my teacher said, and I feel the same way.

"It's just unfamiliar not a hard thing. "

I wish many people try to learn Arduino with no fear.

Schematics

File missing, please reupload.

Code

Reading a Potentiometer

/*	SparkFun	Inventor's	Kit	Example	sketch	02
POTENTIOMETER
		Measure	the	position	of	a	potentiometer	and	use	it	to		control	the	blink	rate	of	an	LED.	Turn	the	knob	to	make		it	blink	faster	or	slower!
This	sketch	was	written	by	SparkFun	Electronics, with	lots	of	help	from	the	Arduino	community. This	code	is	completely	free	for	any	use. Visit	http://learn.sparkfun.com/products/2	for	SIK	information. Visit	http://www.arduino.cc	to	learn	about	Arduino. */
//Create	global	variables	(variables	that	can	be	used	anywhere	in	our	sketch)
//	Here	we're	creating	a	variable	called	"sensorPin"	of	type	"int" //	and	initializing	it	to	have	the	value	"0,"	which	is	the	analog	input	pin	the	pot	is					//conected	to. int	sensorPin	=	0;				
//	Variable	for	storing	the	pin	number	that	the	LED	is	connected	to																	int	ledPin	=	13;						
//	this	function	runs	once	when	the	sketch	starts	up void	setup()	{		//set	ledPin	(13)	as	an	OUTPUT		pinMode(ledPin,	OUTPUT); }
//	this	function	runs	repeatedly	after	setup()	finishes void	loop()	{
		//create	a	local	variable	(variable	that	can	only	be	used	inside	of	loop()	to	store							//a	sensor	value	called	sensorValue		int	sensorValue;
Experiment	2:	Reading	a	Potentiometer
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		//use	the	analogRead()	function	to	read	sensorPin	and	store	the	value	in	sensorValue		sensorValue	=	analogRead(sensorPin);				
		//	Turn	the	LED	on		digitalWrite(ledPin,	HIGH);					
		delay(sensorValue);													
		//	Turn	the	LED	off		digitalWrite(ledPin,	LOW);						
	//delay	for	the	value	of	sensorValue		delay(sensorValue);													
		//loop	back	to	the	top }