{"product_id":"soil-moisture-sensor-kit-for-beginners-light-up-plant-water-indicator","title":"Soil Moisture Sensor Kit – Light-Up Plant Water Indicator","description":"\u003cp\u003eThis DIY soil moisture sensor kit from Lectrify lets you build a light-up flower that tells you when a plant needs water. The flower's roots measure the resistance of the soil, and an LED switches on when the soil gets too dry. It is a Level 2 kit for beginners, students and hobbyists who want to learn real electronics while solving an everyday problem.\u003c\/p\u003e\u003ch3\u003eKey features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eTeaches how an NPN transistor works as a switch\u003c\/li\u003e\n\u003cli\u003eCovers resistors, variable resistance and the potentiometer\u003c\/li\u003e\n\u003cli\u003eBuilds a voltage divider circuit\u003c\/li\u003e\n\u003cli\u003eUses soil conductivity to sense moisture: wet soil keeps the LED off, dry soil turns it on\u003c\/li\u003e\n\u003cli\u003eAdjustable dial lets you calibrate the trigger level for each plant\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eIn the box\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e1 x NPN transistor\u003c\/li\u003e\n\u003cli\u003e1 x 220Ω resistor\u003c\/li\u003e\n\u003cli\u003e1 x 100K potentiometer\u003c\/li\u003e\n\u003cli\u003e1 x red LED\u003c\/li\u003e\n\u003cli\u003eCircuit board\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eTools required but not included: soldering iron, solder wire, wire cutters and a Phillips screwdriver. Find more beginner projects in our \u003ca href=\"\/collections\/learn-to-solder\"\u003elearn-to-solder collection\u003c\/a\u003e.\u003c\/p\u003e","brand":"Lectrify","offers":[{"title":"Individual","offer_id":68047265562729,"sku":"sku-45119013290184","price":18.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0265\/1537\/4185\/files\/Blue_and_Yellow_Illustrative_Toy_Store_Sale_Instagram_Post_2.png?v=1794461378","url":"https:\/\/makersthings.com\/products\/soil-moisture-sensor-kit-for-beginners-light-up-plant-water-indicator","provider":"maker's things","version":"1.0","type":"link"}