{"id":1834,"date":"2025-06-18T15:37:16","date_gmt":"2025-06-18T15:37:16","guid":{"rendered":"https:\/\/learnbydoing.dev\/?p=1834"},"modified":"2026-01-10T22:45:57","modified_gmt":"2026-01-10T22:45:57","slug":"how-to-use-a-potentiometer-with-arduino","status":"publish","type":"post","link":"https:\/\/learnbydoing.dev\/how-to-use-a-potentiometer-with-arduino\/","title":{"rendered":"How to use a Potentiometer with Arduino"},"content":{"rendered":"
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  • \n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\n\t\t\t\tArduino<\/span>, Electronics<\/span>, Tutoriales<\/span>\t\t\t\t<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t<\/ul>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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    In the world of robotics and electronics, sensors and input devices play a crucial role in allowing machines to interact with their environment. Among the simplest and most versatile components is the potentiometer<\/strong> \u2014 an inexpensive and reliable device that allows manual voltage adjustment.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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    \ud83d\udd0d What is a Potentiometer?<\/h3>

    A potentiometer<\/strong> is a variable resistor with three terminals, whose resistance value can be adjusted by rotating a knob or sliding a control. It\u2019s one of the most common input devices, often used in volume controls, light dimmers, joysticks, and various adjustment systems.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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    \ud83d\udcd1 How it Works<\/h3>

    Inside a potentiometer is a resistive track<\/strong> and a wiper<\/strong> (a movable contact). By connecting the two outer pins to a reference voltage (typically 0V and 5V) and taking the signal from the center pin, you can get a variable voltage depending on the wiper\u2019s position.<\/p>

    This voltage is read by the Arduino via an analog input pin and converted into a digital value using its built-in ADC (Analog to Digital Converter)<\/strong>.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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    \u00a0\ud83d\udcdd Required Components<\/h3>

    • 1 x Arduino Uno<\/strong> (or compatible board)

      <\/p><\/li>

    • 1 x potentiometer<\/strong> (10k\u03a9 recommended)

      <\/p><\/li>

    • Breadboard

      <\/p><\/li>

    • Jumper wires

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      \ud83d\udd0c Wiring Diagram<\/h2>
      Potentiometer<\/th>Arduino<\/th><\/tr><\/thead>
      Pin 1 (VCC)<\/td>5V<\/td><\/tr>
      Pin 2 (OUT)<\/td>A0<\/td><\/tr>
      Pin 3 (GND)<\/td>GND<\/td><\/tr><\/tbody><\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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      \ud83d\udce6 Complete Arduino Code<\/h3>

      Here\u2019s the code to read the potentiometer\u2019s value and display it in the Serial Monitor:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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      \n\t\t\t\t\n\t\t\t\t\t\/\/ Define the pin connected to the potentiometer\r\nconst int potPin = A0;\r\n\r\n\/\/ Variable to store the analog reading\r\nint potValue = 0;\r\n\r\nvoid setup() {\r\n  \/\/ Initialize serial communication\r\n  Serial.begin(9600);\r\n}\r\n\r\nvoid loop() {\r\n  \/\/ Read the analog value from the potentiometer\r\n  potValue = analogRead(potPin);\r\n  \r\n  \/\/ Print the value to the Serial Monitor\r\n  Serial.print(\"Potentiometer Value: \");\r\n  Serial.println(potValue);\r\n  \r\n  \/\/ Wait 200 milliseconds before the next reading\r\n  delay(200);\r\n}\r\n<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7a888ec elementor-widget elementor-widget-text-editor\" data-id=\"7a888ec\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h3><b>\ud83d\udd0e\u00a0<\/b><b>Breaking down the Code<\/b><\/h3><p>Let\u2019s review the code section by section:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-455a2f8 elementor-widget elementor-widget-text-editor\" data-id=\"455a2f8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h5 data-start=\"1857\" data-end=\"1885\">Variable Declarations<\/h5><p data-start=\"3014\" data-end=\"3024\">We define:<\/p><ul data-start=\"3025\" data-end=\"3131\"><li data-start=\"3025\" data-end=\"3084\"><p data-start=\"3027\" data-end=\"3084\"><code data-start=\"3027\" data-end=\"3035\">potPin<\/code> \u2192 the analog pin connected to the potentiometer.<\/p><\/li><li data-start=\"3085\" data-end=\"3131\"><p data-start=\"3087\" data-end=\"3131\"><code data-start=\"3087\" data-end=\"3097\">potValue<\/code> \u2192 a variable to hold the reading.<\/p><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-01f8801 elementor-widget elementor-widget-code-highlight\" data-id=\"01f8801\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"prismjs-tomorrow copy-to-clipboard\">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-cpp line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-cpp\">\n\t\t\t\t\t<xmp>const int potPin = A0;\r\nint potValue = 0;\r\n<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8141c6a elementor-widget elementor-widget-text-editor\" data-id=\"8141c6a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h5 data-start=\"1857\" data-end=\"1885\">Setup Function<\/h5>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6503883 elementor-widget elementor-widget-code-highlight\" data-id=\"6503883\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"prismjs-tomorrow copy-to-clipboard\">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-cpp line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-cpp\">\n\t\t\t\t\t<xmp>void setup() {\r\n  Serial.begin(9600);\r\n}\r\n<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2547d99 elementor-widget elementor-widget-text-editor\" data-id=\"2547d99\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-start=\"3215\" data-end=\"3287\">In the <code data-start=\"3222\" data-end=\"3231\">setup()<\/code> function, which runs once when the board is powered on:<\/p><ul data-start=\"3288\" data-end=\"3439\"><li data-start=\"3288\" data-end=\"3439\"><p data-start=\"3290\" data-end=\"3439\">We initialize serial communication at <strong data-start=\"3328\" data-end=\"3341\">9600 baud<\/strong>, necessary for sending data to the computer and viewing it in the <strong data-start=\"3408\" data-end=\"3438\">Arduino IDE Serial Monitor<\/strong>.<\/p><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bdbed67 elementor-widget elementor-widget-text-editor\" data-id=\"bdbed67\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h5 data-start=\"1857\" data-end=\"1885\">Main Loop<\/h5>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d361b1c elementor-widget elementor-widget-code-highlight\" data-id=\"d361b1c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"prismjs-tomorrow copy-to-clipboard\">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-cpp line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-cpp\">\n\t\t\t\t\t<xmp>potValue = analogRead(potPin);<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b51cf90 elementor-widget elementor-widget-text-editor\" data-id=\"b51cf90\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-start=\"3514\" data-end=\"3644\">This reads the voltage from the analog pin <code data-start=\"3557\" data-end=\"3561\">A0<\/code>. The <code data-start=\"3567\" data-end=\"3581\">analogRead()<\/code> function returns an integer between <strong data-start=\"3618\" data-end=\"3623\">0<\/strong> and <strong data-start=\"3628\" data-end=\"3636\">1023<\/strong>, where:<\/p><ul data-start=\"3645\" data-end=\"3691\"><li data-start=\"3645\" data-end=\"3666\"><p data-start=\"3647\" data-end=\"3666\"><strong data-start=\"3647\" data-end=\"3652\">0<\/strong> represents 0V<\/p><\/li><li data-start=\"3667\" data-end=\"3691\"><p data-start=\"3669\" data-end=\"3691\"><strong data-start=\"3669\" data-end=\"3677\">1023<\/strong> represents 5V<\/p><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-85beade elementor-widget elementor-widget-code-highlight\" data-id=\"85beade\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"prismjs-tomorrow copy-to-clipboard\">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-cpp line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-cpp\">\n\t\t\t\t\t<xmp>Serial.print(\"Potentiometer Value: \");\r\nSerial.println(potValue);\r\n<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8c151f2 elementor-widget elementor-widget-text-editor\" data-id=\"8c151f2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Sends the value to the <strong data-start=\"3797\" data-end=\"3815\">Serial Monitor<\/strong>, preceded by a descriptive label.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b11d22b elementor-widget elementor-widget-code-highlight\" data-id=\"b11d22b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"prismjs-tomorrow copy-to-clipboard\">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-cpp line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-cpp\">\n\t\t\t\t\t<xmp>delay(200);\r\n<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e7a0dfa elementor-widget elementor-widget-text-editor\" data-id=\"e7a0dfa\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Pauses the program for <strong data-start=\"3902\" data-end=\"3922\">200 milliseconds<\/strong> before the next reading, making the data stream easier to follow.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c92ae44 elementor-widget elementor-widget-text-editor\" data-id=\"c92ae44\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h3>\ud83d\udda5\ufe0f Viewing the Data<\/h3><p data-start=\"4020\" data-end=\"4055\">To monitor the values in real-time:<br \/><br \/><\/p><ol data-start=\"4056\" data-end=\"4296\"><li data-start=\"4056\" data-end=\"4097\"><p data-start=\"4059\" data-end=\"4097\">Upload the code to your Arduino board.<br \/><br \/><\/p><\/li><li data-start=\"4098\" data-end=\"4179\"><p data-start=\"4101\" data-end=\"4179\">Open the <strong data-start=\"4110\" data-end=\"4128\">Serial Monitor<\/strong> from the Arduino IDE (<strong data-start=\"4151\" data-end=\"4177\">Tools &gt; Serial Monitor<\/strong>).<br \/><br \/><\/p><\/li><li data-start=\"4180\" data-end=\"4213\"><p data-start=\"4183\" data-end=\"4213\">Set the baud rate to <strong data-start=\"4204\" data-end=\"4212\">9600<\/strong>.<br \/><br \/><\/p><\/li><li data-start=\"4214\" data-end=\"4296\"><p data-start=\"4217\" data-end=\"4296\">Turn the potentiometer knob and watch the values change from <strong data-start=\"4278\" data-end=\"4283\">0<\/strong> to <strong data-start=\"4287\" data-end=\"4295\">1023<\/strong>.<br \/><br \/><\/p><\/li><\/ol>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>In the world of robotics and electronics, sensors and input devices play a crucial role in allowing machines to interact with their environment. Among the simplest and most versatile components is the potentiometer \u2014 an inexpensive and reliable device that allows manual voltage adjustment. \ud83d\udd0d What is a Potentiometer? A potentiometer is a variable resistor [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":2046,"comment_status":"closed","ping_status":"open","sticky":false,"template":"elementor_header_footer","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[68,69,43],"tags":[95,94,59,84,67,83,87,82,66,91,93,92,64],"class_list":["post-1834","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-arduino","category-electronics","category-tutorials","tag-adc","tag-analog","tag-arduino","tag-c","tag-complete","tag-cpp","tag-guide","tag-ide","tag-learn-by-doing","tag-potentiometer","tag-resistance","tag-resistor","tag-tutorial"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How to use a Potentiometer with Arduino - Learn by Doing!<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/learnbydoing.dev\/es\/how-to-use-a-potentiometer-with-arduino\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Installing ROS 2 Jazzy on Ubuntu 24.04: Step-by-Step Tutorial\" \/>\n<meta property=\"og:description\" content=\"In the world of robotics and electronics, sensors and input devices play a crucial role in allowing machines to interact with their environment. Among the simplest and most versatile components is the potentiometer \u2014 an inexpensive and reliable device that allows manual voltage adjustment. \ud83d\udd0d What is a Potentiometer? 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