{"product_id":"light-sensitive-photoresistor-ldr-small","title":"Light Sensitive Photoresistor LDR Small","description":"\u003cmeta name=\"description\" content=\"Buy Light Sensitive Photoresistor LDR Small online in India at best price from The Engineer Store, Bengaluru. Authentic product, 7-day warranty on manufacturing defects, fast delivery across India.\"\u003e\n\u003ch1\u003eLight Sensitive Photoresistor LDR - Small Form Factor\u003c\/h1\u003e\n\u003cp\u003eCompact light-dependent resistor (LDR) for precise ambient light detection. This small-size photoresistor changes its resistance based on light intensity - high resistance in darkness, low resistance in bright light - making it ideal for automatic lighting systems, robotics, and sensor-based projects. Available at The Engineer Store, Bengaluru, with fast shipping and full technical support.\u003c\/p\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eComponent Type\u003c\/td\u003e\n\u003ctd\u003ePhotoresistor \/ Light Dependent Resistor (LDR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003eSmall (5mm diameter typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensing Material\u003c\/td\u003e\n\u003ctd\u003eCadmium Sulfide (CdS)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDark Resistance\u003c\/td\u003e\n\u003ctd\u003e~1 MOhm (in complete darkness)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight Resistance\u003c\/td\u003e\n\u003ctd\u003e~10-20 kOhm (at 10 lux) \/ ~2-5 kOhm (at 100 lux)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpectral Peak\u003c\/td\u003e\n\u003ctd\u003e~540 nm (green light, visible spectrum)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Voltage\u003c\/td\u003e\n\u003ctd\u003e150V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Power Dissipation\u003c\/td\u003e\n\u003ctd\u003e100 mW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResponse Time\u003c\/td\u003e\n\u003ctd\u003eRise ~20 ms \/ Decay ~30 ms (typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-30 degreesC to +70 degreesC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eThrough-hole (2-pin, breadboard compatible)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eOriginal \/ Authentic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e7-day warranty on manufacturing defects\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupport\u003c\/td\u003e\n\u003ctd\u003eEmail \u0026amp; WhatsApp 24\/7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnalog light sensing:\u003c\/strong\u003e Resistance varies smoothly with ambient light intensity for proportional readings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact 5mm form factor:\u003c\/strong\u003e Fits easily on breadboards, perfboards, and tight PCB layouts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide resistance range:\u003c\/strong\u003e From a few kOhm in bright light to over 1 MOhm in darkness for high sensitivity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSimple 2-pin interface:\u003c\/strong\u003e No complex wiring - works with a basic voltage divider circuit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow cost, high reliability:\u003c\/strong\u003e Durable CdS element with consistent performance over thousands of cycles\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBroad operating voltage:\u003c\/strong\u003e Compatible with 3.3V, 5V, and higher voltage circuits\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo polarity:\u003c\/strong\u003e Connect in either direction - no positive or negative terminal to worry about\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eHow It Works\u003c\/h2\u003e\n\u003cp\u003eThe LDR is made from cadmium sulfide, a semiconductor material whose electrical resistance decreases as light intensity increases. When photons strike the CdS surface, they free electrons, increasing conductivity. By placing the LDR in a voltage divider circuit with a fixed resistor (typically 10 kOhm), you can read the varying voltage on an Arduino or microcontroller analog pin to determine light levels. The small size makes it perfect for embedded applications where space is limited.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Choose This LDR?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e100% authentic components from trusted, verified suppliers\u003c\/li\u003e\n\u003cli\u003eTested for consistent dark and light resistance values\u003c\/li\u003e\n\u003cli\u003e1-5 day shipping, 7-8 day delivery across India from our Bengaluru warehouse\u003c\/li\u003e\n\u003cli\u003eExpert technical support to help you integrate into any circuit\u003c\/li\u003e\n\u003cli\u003ePerfect balance of sensitivity, size, and affordability\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eProject Ideas\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic Street Light:\u003c\/strong\u003e Detect dusk and dawn to switch lights on\/off automatically using Arduino or a simple transistor circuit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-Following Robot:\u003c\/strong\u003e Use multiple LDRs to detect contrast between a dark line and light surface for robot navigation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmart Home Light Controller:\u003c\/strong\u003e Adjust indoor LED brightness based on ambient sunlight entering a room\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecurity Alarm System:\u003c\/strong\u003e Trigger an alert when a laser beam aimed at the LDR is interrupted\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeather Station \/ Data Logger:\u003c\/strong\u003e Log light intensity over time to track cloud cover, sunrise\/sunset patterns\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolar Tracker:\u003c\/strong\u003e Pair two LDRs to detect the sun's position and orient a solar panel for maximum efficiency\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNight Light Circuit:\u003c\/strong\u003e Build a simple analog circuit that turns on an LED automatically when the room gets dark\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLearning \u0026amp; Education:\u003c\/strong\u003e Ideal for teaching voltage dividers, analog-to-digital conversion, and sensor interfacing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eBasic Wiring Guide (Arduino)\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eLDR Pin 1\u003c\/td\u003e\n\u003ctd\u003eConnect to 5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLDR Pin 2\u003c\/td\u003e\n\u003ctd\u003eConnect to Arduino Analog Pin (A0) AND to GND through a 10 kOhm resistor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit Type\u003c\/td\u003e\n\u003ctd\u003eVoltage divider (LDR + 10 kOhm fixed resistor)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReading Method\u003c\/td\u003e\n\u003ctd\u003eanalogRead(A0) - returns 0 (dark) to 1023 (bright light)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1 x Light\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhen will I receive my order?\u003c\/summary\u003e\n\u003cp\u003eProducts ship within 1-5 days from our Bengaluru warehouse. Delivery within 7-8 days to most locations across India.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs technical support available?\u003c\/summary\u003e\n\u003cp\u003eYes, 24\/7 support via email and WhatsApp for setup, troubleshooting, and application guidance.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is your return policy?\u003c\/summary\u003e\n\u003cp\u003e7-day returns on manufacturing defects only. Full refund or replacement. Not applicable for user damage or misuse.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre bulk discounts available?\u003c\/summary\u003e\n\u003cp\u003eYes, wholesale pricing on orders of 10+ units. Contact us via WhatsApp or email for a custom quote.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003ch2\u003eBuy Light Sensitive Photoresistor LDR Small Online in India\u003c\/h2\u003e\n\u003cp\u003ePurchase the \u003cstrong\u003eLight Sensitive Photoresistor LDR Small\u003c\/strong\u003e online at \u003ca href=\"https:\/\/theengineerstore.in\"\u003eThe Engineer Store\u003c\/a\u003e - India's most trusted electronics components store. We deliver across all major cities including Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat. Get the best price on \u003cstrong\u003eLight Sensitive Photoresistor LDR Small\u003c\/strong\u003e with fast 1-5 day shipping from our Bengaluru warehouse. All products are 100% authentic, sourced from authorized distributors with 7-day warranty on manufacturing defects.\u003c\/p\u003e\n\u003cp\u003eLooking to buy \u003cstrong\u003eLight Sensitive Photoresistor LDR Small\u003c\/strong\u003e at the best price in India? The Engineer Store offers competitive pricing, bulk discounts for orders of 10+ units, and dedicated technical support via email and WhatsApp. Whether you are a hobbyist, student, or professional engineer, we have everything you need for your electronics projects.\u003c\/p\u003e","brand":"My Store","offers":[{"title":"Default Title","offer_id":43773644210339,"sku":"TES-EV102167","price":26.82,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/4479\/7091\/products\/tech3213-ldr_sensor-1.jpg?v=1701073521","url":"https:\/\/www.theengineerstore.in\/zh-hans\/products\/light-sensitive-photoresistor-ldr-small","provider":"The Engineer Store","version":"1.0","type":"link"}