{"product_id":"kit-plant-light-monitor-kit-with-arduino-uno-plus-ldr","title":"Plant Light Monitor Kit with Arduino Uno + LDR","description":"\u003ch1\u003eArduino Plant Light Monitor Kit — Build Your Own Automatic Grow Light System\u003c\/h1\u003e\n\n\u003cp class=\"value-summary\"\u003eEvery part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.\u003c\/p\u003e\n\n\u003cdiv class=\"specs-strip\"\u003e\n  \u003cspan\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Beginner\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eBuild Time:\u003c\/strong\u003e 2-3 hrs\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eAge:\u003c\/strong\u003e 5-15\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e Building transistor switching circuits\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eWhat if your houseplants could turn on their own light the moment a room gets too dark? This kit gives you the blueprint: light‑dependent resistors (LDRs) read ambient brightness, an Arduino Uno processes the reading, and a pair of BC547 transistors switches a bank of five white LEDs — your first real‑world automated circuit for indoor gardening.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Build\u003c\/h2\u003e\n\u003cp\u003eYou will assemble a complete plant light monitor that senses twilight, drives a transistor switch without a relay, and illuminates a 5‑LED strip when your ferns or seedlings need supplemental light. The LDR voltage divider feeds an analog pin; the Arduino compares it against a threshold you set, then toggles the transistor to feed current to the LEDs. Mount it beside a terrarium or over a seed tray, and the circuit takes over the dark‑cycle timing automatically.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Learn\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eConverting analog LDR readings to a digital decision using Arduino’s analogRead() and simple thresholds.\u003c\/li\u003e\n  \u003cli\u003eWiring a BC547 transistor as a saturated switch to drive LED loads directly from a 9 V battery.\u003c\/li\u003e\n  \u003cli\u003eCalibrating light sensitivity through resistor selection so the circuit triggers exactly when daylight fades.\u003c\/li\u003e\n  \u003cli\u003eIntegrating sensors, a microcontroller, and output devices into a functional home‑automation block.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eLDR\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e5mm White LED\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBC547 Transistor\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e10kΩ Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e1kΩ Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e220Ω Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e400-pt Breadboard\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM-M Wires\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e9V Battery Snap\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Buy This Kit Instead of Sourcing Parts Separately\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFactor\u003c\/th\u003e\n\u003cth\u003eSourcing Separately\u003c\/th\u003e\n\u003cth\u003eCompoden Kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility checks\u003c\/td\u003e\n\u003ctd\u003eYou verify every part\u003c\/td\u003e\n\u003ctd\u003ePre-tested as a system\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBuild support\u003c\/td\u003e\n\u003ctd\u003eForums and scattered tutorials\u003c\/td\u003e\n\u003ctd\u003eAI companion trained on this exact project\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTime to first working build\u003c\/td\u003e\n\u003ctd\u003eDays of debugging\u003c\/td\u003e\n\u003ctd\u003eHours, with step-by-step guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping coordination\u003c\/td\u003e\n\u003ctd\u003eMultiple sellers, multiple delays\u003c\/td\u003e\n\u003ctd\u003eOne shipment from Bengaluru in 3-5 days\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho This Kit Is For\u003c\/h2\u003e\n\u003cp\u003eCBSE Class 11‑12 students building sensor‑based automation for their science submissions, first‑year B.Tech ECE\/EEE students getting hands‑on with an embedded system, and makers at ATL Tinkering Labs or Smart India Hackathon prep wanting a live plant‑care demo. The kit suits any young hobbyist (10+) who wants to move beyond blinking LEDs to a useful switching circuit.\u003c\/p\u003e\n\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eWhat if I get stuck during the build?\u003c\/summary\u003e\u003cp\u003eScan the QR on the box to launch the AI companion; it walks you through each breadboard connection. You can also send a photo on WhatsApp and our Bengaluru maker team will reply within business hours.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I use this circuit to control a bigger grow light system later?\u003c\/summary\u003e\u003cp\u003eYes. The BC547 transistors switch up to 100 mA, enough for the included LEDs. For larger lights, replace the transistor output stage with a relay module driven by the same Arduino pin — the logic is identical.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes the project work with Arduino Nano or other boards?\u003c\/summary\u003e\u003cp\u003eAbsolutely. The LDR divider and transistor base resistor values are designed for 5 V logic. Any 5 V Arduino clone (Nano, Pro Mini) works after adjusting the pin numbers in the code the AI companion provides.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs the kit safe for a 10‑year‑old beginner?\u003c\/summary\u003e\u003cp\u003eAll parts run on a single 9 V battery; the breadboard connections are plug‑and‑play. The AI companion uses large illustrations and voice notes. Adult supervision is recommended only when attaching the battery snap.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003eIndoor Gardening — LDR detects darkness and switches LEDs on via transistor. First real-world switching circuit.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/uno-r3-ch340g-atmega328p-board-arduino-compatible\"\u003eArduino Uno R3\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/ldr-sensor-5mm-light-dependent-resistor-for-arduino-compoden\"\u003eLDR\u003c\/a\u003e x2\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/inductive-proximity-sensor-5mm-npn-no-ceyone-compoden\"\u003e5mm White LED\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/bc547-npn-transistor-45v-100ma-to-92-for-switching-amplification\"\u003eBC547 Transistor\u003c\/a\u003e x2\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e10kΩ Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e1kΩ Resistors x5\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e220Ω Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/breadboard-standard-bundle-830400-tie-points-for-prototyping\"\u003e400-pt Breadboard\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eM-M Wires x20\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/9v-battery-snap-connector-with-15cm-wires-compoden\"\u003e9V Battery Snap\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the Plant Light Monitor Kit with Arduino Uno + LDR?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Plant Light Monitor Kit with Arduino Uno + LDR includes all components needed: Arduino Uno R3, LDR, 5mm White LED, BC547 Transistor, 10kΩ Resistors and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the Plant Light Monitor Kit with Arduino Uno + LDR?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Beginner level makers, suitable for ages 5-15. Indoor Gardening — LDR detects darkness and switches LEDs on via transistor. First real-world switching circuit. Estimated build time is 2-3 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the Plant Light Monitor Kit with Arduino Uno + LDR online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the Plant Light Monitor Kit with Arduino Uno + LDR is available online at Compoden (compoden.in), India's AI-powered electronics and robotics store. Ships from Bengaluru in 1-5 business days across India.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"Product\",\n  \"name\": \"Plant Light Monitor Kit with Arduino Uno + LDR\",\n  \"description\": \"Indoor Gardening — LDR detects darkness and switches LEDs on via transistor. First real-world switching circuit.\",\n  \"sku\": \"CDN-KIT-2958\",\n  \"brand\": {\"@type\": \"Brand\", \"name\": \"Compoden\"},\n  \"offers\": {\n    \"@type\": \"Offer\",\n    \"url\": \"https:\/\/compoden.in\/products\/kit-plant-light-monitor-kit-with-arduino-uno-plus-ldr\",\n    \"priceCurrency\": \"INR\",\n    \"price\": \"1295\",\n    \"availability\": \"https:\/\/schema.org\/InStock\",\n    \"seller\": {\"@type\": \"Organization\", \"name\": \"Compoden\"}\n  },\n  \"category\": \"Home Automation\"\n}\n\u003c\/script\u003e","brand":"Compoden","offers":[{"title":"Clone","offer_id":53463646568813,"sku":"CDN-KIT-2958-CL","price":1550.0,"currency_code":"INR","in_stock":true},{"title":"R3 Original","offer_id":53463646601581,"sku":"CDN-KIT-2958-R3","price":3820.0,"currency_code":"INR","in_stock":true},{"title":"R4 WiFi","offer_id":53463646634349,"sku":"CDN-KIT-2958-R4","price":3190.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/kit-plant-light-monitor-kit-with-arduino-uno-plus-ldr.png?v=1781948949","url":"https:\/\/compoden.com\/products\/kit-plant-light-monitor-kit-with-arduino-uno-plus-ldr","provider":"Compoden","version":"1.0","type":"link"}