--- product_id: 774272392 title: "AZDelivery 3 x KY-021 Magnet Switch Mini Magnet Reed Module Sensor compatible with Arduino Including E-Book!" brand: "azdelivery" price: "€ 0.01" currency: EUR in_stock: false url: https://www.desertcart.hr/products/774272392-azdelivery-3-x-ky-021-magnet-switch-mini-magnet-reed store_origin: HR region: Croatia --- # Free detailed eBook included 3.3-5V wide voltage range Universal magnetic reed switch AZDelivery 3 x KY-021 Magnet Switch Mini Magnet Reed Module Sensor compatible with Arduino Including E-Book! **Brand:** azdelivery **Price:** € 0.01 **Availability:** ❌ Out of Stock ## Summary > 🧲 Unlock your smart project potential with the ultimate magnetic switch kit! ## Quick Answers - **What is this?** AZDelivery 3 x KY-021 Magnet Switch Mini Magnet Reed Module Sensor compatible with Arduino Including E-Book! by azdelivery - **How much does it cost?** € 0.01 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/774272392-azdelivery-3-x-ky-021-magnet-switch-mini-magnet-reed) ## Best For - azdelivery enthusiasts ## Why This Product - Trusted azdelivery brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Reliable One-Way Switch:** Ensures precise magnetic detection with a robust reed contact for consistent performance. - • **Wide Voltage Compatibility:** Operates effortlessly between 3.3V and 5V, fitting diverse DIY setups. - • **Comprehensive Starter Guide:** Includes a free eBook packed with step-by-step instructions and example scripts to jumpstart your innovation. - • **Compact & Lightweight Design:** At just 20g and minimal dimensions, it fits perfectly into any smart home or automation project. - • **Plug & Play Magnetic Sensing:** Seamlessly integrates with Arduino & Raspberry Pi for instant project activation. ## Overview The AZDelivery 3 x KY-021 Magnet Reed Module Sensor is a compact, lightweight magnetic switch compatible with Arduino and Raspberry Pi. Operating within a 3.3V to 5V range, it includes a free eBook with detailed installation guides and example scripts, enabling quick and reliable integration into home automation and DIY electronics projects. ## Description For top quality Raspberry Pi products, AZ-Delivery Vertriebs is your go to. We provide an array of application examples, full installation guides, eBooks, libraries, and all-round assistance. AZ-Delivery, your microelectronics expert. ## Features - ✅ Universal magnetic switch (reed contact). - ✅ Operating voltage 3.3 V - 5 V. - ✅ The free eBook 📖 with installation instructions and example script from AZ-Delivery allows you to start your project directly without having to spend a lot of time setting up the product. - ✅ This product includes an E-Book that provides useful information on how to begin your project, it helps with a quick setup and saves time on the configuration process. We provide an array of application examples, full installation guides and libraries. ## Technical Specifications | Specification | Value | |---------------|-------| | Manufacturer | AZDelivery | | Part number | 3x KY-021 | | Item Weight | 20 g | | Package Dimensions | 8.64 x 6.5 x 1 cm; 20 g | | Item model number | KY-021 | | Item Package Quantity | 1 | | Switch Type | 1-way | | Plug profile | PCB Mount, Panel Mount | | Batteries included? | No | | Batteries Required? | No | ## Product Details - **Operation mode:** ON-OFF - **Operating voltage:** 5 Volts - **Contact type:** Normally Open - **Connector type:** Fast - **Brand:** AZDelivery - **Terminal:** Solder - **Circuit type:** 1-way - **Mounting type:** PCB Mount, Panel Mount - **Actuator type:** Push Button - **Contact material:** Alloy Steel ## Images ![AZDelivery 3 x KY-021 Magnet Switch Mini Magnet Reed Module Sensor compatible with Arduino Including E-Book! - Image 1](https://m.media-amazon.com/images/I/71QowTit5uL.jpg) ![AZDelivery 3 x KY-021 Magnet Switch Mini Magnet Reed Module Sensor compatible with Arduino Including E-Book! - Image 2](https://m.media-amazon.com/images/I/61KyVark9mL.jpg) ![AZDelivery 3 x KY-021 Magnet Switch Mini Magnet Reed Module Sensor compatible with Arduino Including E-Book! - Image 3](https://m.media-amazon.com/images/I/6138B445yaL.jpg) ![AZDelivery 3 x KY-021 Magnet Switch Mini Magnet Reed Module Sensor compatible with Arduino Including E-Book! - Image 4](https://m.media-amazon.com/images/I/71o2TrHW48L.jpg) ![AZDelivery 3 x KY-021 Magnet Switch Mini Magnet Reed Module Sensor compatible with Arduino Including E-Book! - Image 5](https://m.media-amazon.com/images/I/61wLBqcvczL.jpg) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/774272392-azdelivery-3-x-ky-021-magnet-switch-mini-magnet-reed](https://www.desertcart.hr/products/774272392-azdelivery-3-x-ky-021-magnet-switch-mini-magnet-reed) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-05-14*