فنون
الجمال والعناية
حِرَف
الثقافة والتاريخ
ترفيه
البيئة
الطعام والمشروبات
المستقبل الأخضر
الهندسة العكسية
العلوم
رياضة
التقنية
الأجهزة القابلة للارتداء
Reading a Potentiometer — SIK Circuit 2
Ed

أنشأه

Ed

17. مارس 2026FI
48
0
0
0
0

Reading a Potentiometer — SIK Circuit 2

Learn to read analog input from a potentiometer and use it to control LED blink speed. Turn the knob to make the LED blink faster or slower — your first step into analog sensors!

التعليمات

1

Parts & Introduction

In this experiment you'll use a potentiometer (a variable resistor with a knob) to control how fast an LED blinks. This introduces analogRead() — reading voltage levels between 0 and 5V as values from 0 to 1023.

Parts Needed

  • 1x Arduino Uno + USB cable
  • 1x Breadboard
  • 1x Potentiometer (10K)
  • 1x LED (any color)
  • 1x 330Ω Resistor
  • 6x Jumper Wires

المواد لهذه الخطوة:

SparkFun Inventors Kit - V3.2SparkFun Inventors Kit - V3.21 طقم
Arduino Uno R3Arduino Uno R31 قطعة
BreadboardBreadboard1 قطعة
Potentiometer (10K)Potentiometer (10K)1 قطعة
5mm LED5mm LED1 قطعة
330 Ohm Resistor330 Ohm Resistor1 قطعة
Jumper WiresJumper Wires6 قطع

الأدوات المطلوبة:

Computer with Arduino IDE
2

Hardware Hookup

Wiring Instructions

  1. Place the potentiometer in the breadboard. It has three pins.
  2. Connect the left pin to GND and the right pin to 5V (or vice versa).
  3. Connect the middle pin (wiper) to Analog Pin A0.
  4. Place an LED in the breadboard. Connect the positive leg (longer) to Digital Pin 13.
  5. Connect the negative leg (shorter) through a 330Ω resistor to GND.
  6. Connect the 5V and GND rails on the breadboard to the Arduino.

المواد لهذه الخطوة:

Potentiometer (10K)Potentiometer (10K)1 قطعة
5mm LED5mm LED1 قطعة
330 Ohm Resistor330 Ohm Resistor1 قطعة
BreadboardBreadboard1 قطعة
Jumper WiresJumper Wires6 قطع
3

Arduino Code

Open the Arduino IDE and upload the following sketch to your Arduino board.

potentiometer.inoarduino
/*
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 code is completely free for any use.
Visit http://learn.sparkfun.com/products/2 for SIK information.
*/

int sensorPin = 0;    // Potentiometer on analog pin 0
int ledPin = 13;      // LED on digital pin 13

void setup()
{
  pinMode(ledPin, OUTPUT);
}

void loop()
{
  int sensorValue;

  sensorValue = analogRead(sensorPin);

  digitalWrite(ledPin, HIGH);
  delay(sensorValue);

  digitalWrite(ledPin, LOW);
  delay(sensorValue);
}

المواد لهذه الخطوة:

Arduino Uno R3Arduino Uno R31 قطعة

الأدوات المطلوبة:

Computer with Arduino IDE
4

Test & Experiment

What You Should See

The LED blinks faster or slower as you turn the potentiometer knob. At one extreme it blinks very fast, at the other it blinks slowly.

Troubleshooting

  • Sporadically working: The potentiometer pins may not be making good contact. Press it firmly into the breadboard.
  • Not working: Make sure the wiper (middle pin) goes to Analog pin 0, not Digital pin 0.
  • LED not lighting: LEDs only work in one direction. Flip it around.

Experiments to Try

  • Open the Serial Monitor and print the sensorValue to see the raw numbers (0-1023).
  • Use map() to convert the sensor range to a brightness range and control LED brightness with analogWrite().

المواد

7

الأدوات المطلوبة

1
  • 13
    Computer with Arduino IDE
التكلفة الإجمالية المقدرة
$138.00

CC0 ملكية عامة

هذا المخطط مُصدر بموجب CC0. يحق لك نسخه وتعديله وتوزيعه واستخدامه لأي غرض، دون طلب إذن.

ادعم الصانع بشراء منتجات عبر مخططه حيث يكسب عمولة الصانع يحددها البائعون، أو أنشئ نسخة جديدة من هذا المخطط وضمّنه كرابط في مخططك لمشاركة الإيرادات.

النقاش

(0)

تسجيل الدخول للمشاركة في النقاش

جارٍ تحميل التعليقات...