{"product_id":"lm393-photosensitive-sensor-module-light-detection-4-pin-2-pack","title":"2-Pack LM393 Photosensitive Sensor Module – Light Detection","description":"\n\u003ch2\u003e2-Pack LM393 Photosensitive Sensor Module – 4-Pin Light Detection\u003c\/h2\u003e\n\u003cp\u003eGet reliable, accurate light detection with this \u003cstrong\u003e2-Pack LM393 Photosensitive Sensor Module\u003c\/strong\u003e. Built around the popular LM393 comparator IC, each module combines a photosensitive resistor (LDR) with a photosensitive diode to deliver both \u003cstrong\u003eanalog and digital output signals\u003c\/strong\u003e — making it a versatile choice for Arduino, Raspberry Pi, robotics, and a wide range of DIY electronics projects.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual Output:\u003c\/strong\u003e Provides both analog (AO) and digital (DO) signal outputs for maximum flexibility in your circuits.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLM393 Comparator IC:\u003c\/strong\u003e Ensures stable, consistent threshold-based switching for light\/dark detection.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e4-Pin Interface:\u003c\/strong\u003e Simple VCC, GND, DO, and AO connections for fast, hassle-free wiring.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAdjustable Sensitivity:\u003c\/strong\u003e On-board potentiometer lets you fine-tune the light threshold to match your environment.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIndicator LEDs:\u003c\/strong\u003e Power and output status LEDs for easy visual feedback during testing and operation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact \u0026amp; Lightweight:\u003c\/strong\u003e Low-profile PCB design fits easily into enclosures, breadboards, and custom builds.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Compatibility:\u003c\/strong\u003e Works seamlessly with Arduino, ESP8266\/ESP32, Raspberry Pi, and most 3.3V–5V microcontrollers.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2 Modules Included:\u003c\/strong\u003e Great value pack — one for your project, one as a spare or for a second application.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChip:\u003c\/strong\u003e LM393 Dual Voltage Comparator\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSensor Type:\u003c\/strong\u003e Optical \/ Photosensitive (LDR + Photodiode)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutput:\u003c\/strong\u003e Analog Sensor Signal (AO) + Digital Switching (DO)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePins:\u003c\/strong\u003e 4-pin (VCC, GND, DO, AO)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Polymer PCB\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOperating Voltage:\u003c\/strong\u003e 3.3V – 5V DC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 2 Modules\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Made in China\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCommon Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eAutomatic street light \/ smart lighting control circuits\u003c\/li\u003e\n  \u003cli\u003eLine-following and obstacle-avoiding robots\u003c\/li\u003e\n  \u003cli\u003eDay\/night switch automation\u003c\/li\u003e\n  \u003cli\u003eArduino \u0026amp; Raspberry Pi DIY sensor projects\u003c\/li\u003e\n  \u003cli\u003eSecurity and ambient light monitoring systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/electromagnetic-induction-tester-coil-motherboard-fault-detector\"\u003eElectromagnetic Induction Tester – Coil \u0026amp; Circuit Fault Detector\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/air-compressor-pressure-gauge-0-10-0-12-0-25-bar-hydraulic-diy\"\u003eAir Compressor Pressure Gauge 0-10\/0-12\/0-25 Bar | DIY Tool\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/360-bicycle-chain-cleaner-tool-gear-cleaning-kit\"\u003e360° Bicycle Chain Cleaner Tool | Bike Gear Cleaning Kit\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/hand-power-tools\" target=\"_blank\" rel=\"noopener\"\u003eOSHA guidance on hand and power tools\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What voltage does the LM393 photosensitive sensor module require?\u003c\/h4\u003e\n\u003cp\u003eA: The LM393 photosensitive sensor module operates on 3.3V to 5V DC, making it fully compatible with Arduino (5V) and Raspberry Pi \/ ESP8266 \/ ESP32 (3.3V) systems without the need for a level shifter.\u003c\/p\u003e\n\u003ch4\u003eQ: What is the difference between the analog (AO) and digital (DO) outputs on this sensor module?\u003c\/h4\u003e\n\u003cp\u003eA: The analog output (AO) provides a variable voltage proportional to the detected light intensity, allowing your microcontroller to measure exact light levels. The digital output (DO) switches between HIGH and LOW based on a threshold set by the on-board potentiometer, useful for simple light\/dark trigger events.\u003c\/p\u003e\n\u003ch4\u003eQ: Can I adjust the sensitivity of the LM393 light detection module?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. Each module features a small on-board potentiometer (trim pot) that you can turn with a screwdriver to set the exact light-level threshold at which the digital output switches, giving you full control over the module's sensitivity for your specific application.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What voltage does the LM393 photosensitive sensor module require?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The LM393 photosensitive sensor module operates on 3.3V to 5V DC, making it fully compatible with Arduino (5V) and Raspberry Pi \/ ESP8266 \/ ESP32 (3.3V) systems without the need for a level shifter.\"}}, {\"@type\": \"Question\", \"name\": \"What is the difference between the analog (AO) and digital (DO) outputs on this sensor module?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The analog output (AO) provides a variable voltage proportional to the detected light intensity, allowing your microcontroller to measure exact light levels. 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Each module features a small on-board potentiometer (trim pot) that you can turn with a screwdriver to set the exact light-level threshold at which the digital output switches, giving you full control over the module's sensitivity for your specific application.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/n8ande-60.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Home page\", \"item\": \"https:\/\/n8ande-60.myshopify.com\/collections\/frontpage\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"2-Pack LM393 Photosensitive Sensor Module – Light Detection\", \"item\": \"https:\/\/n8ande-60.myshopify.com\/products\/lm393-photosensitive-sensor-module-light-detection-4-pin-2-pack\"}]}\u003c\/script\u003e","brand":"Axl","offers":[{"title":"2PCS Moudle","offer_id":44166217105495,"sku":"14:10#2PCS Moudle","price":21.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0676\/6008\/7383\/files\/Sb388d8a66da041dc82e3da901a7a4a007.webp?v=1786731357","url":"https:\/\/axlcustomersupport.com\/products\/lm393-photosensitive-sensor-module-light-detection-4-pin-2-pack","provider":"Axl","version":"1.0","type":"link"}