{"product_id":"3-channel-relay-expansion-board-for-raspberry-pi-5-4b-3b-strong-electricity-3-way-relay-controls-module-for-smart-home","title":"3-Channel Relay Board for Raspberry Pi 4B, 3B+ and 3B","description":"\u003cp\u003eSwitch separate project circuits from a compatible Raspberry Pi using a three-channel relay board. This expansion accessory connects through the 40-pin GPIO interface on Raspberry Pi 4B, 3B+ and 3B. For makers building projects that need relay-controlled outputs.\u003c\/p\u003e\u003ch2\u003eAdd three relay-controlled outputs to a Pi project\u003c\/h2\u003e\u003cul style=\"list-style:none;padding-left:0\"\u003e\n\u003cli\u003e✅ \u003cstrong\u003eControl separate circuits\u003c\/strong\u003e — Three onboard relays provide individual switching channels for your project.\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eCheck states during testing\u003c\/strong\u003e — Indicator LEDs give you a visible reference when checking relay operation.\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eWork around other GPIO connections\u003c\/strong\u003e — Jumper selection lets you choose the control-pin arrangement for your build.\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eConnect external wiring neatly\u003c\/strong\u003e — Screw terminals provide connection points for the circuits being switched.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThe board is an expansion accessory rather than a complete computer. A Raspberry Pi is not included; check your exact model and allow room for the board and connected wiring.\u003c\/p\u003e\u003cp\u003eThe relay contact ratings describe the marked switching components, not a guarantee for every complete installation. External loads need an appropriate power supply and wiring arrangement. Use suitable professional installation for mains-voltage work.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eTechnical details\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eProduct: relay expansion board\u003c\/li\u003e\n\u003cli\u003eRelay channels: three\u003c\/li\u003e\n\u003cli\u003eCompatible computers: Raspberry Pi 4B, 3B+ and 3B\u003c\/li\u003e\n\u003cli\u003eInterface: 40-pin GPIO\u003c\/li\u003e\n\u003cli\u003eOptocouplers: PC817\u003c\/li\u003e\n\u003cli\u003eControl-pin selection: jumper configurable\u003c\/li\u003e\n\u003cli\u003eRelay contact markings: 5 A at 250 V AC or 5 A at 30 V DC\u003c\/li\u003e\n\u003cli\u003eApproximate board dimensions: 65.15 × 56.21 mm\u003c\/li\u003e\n\u003cli\u003ePackage: one relay board and one screw set\u003c\/li\u003e\n\u003cli\u003eRaspberry Pi: not included\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdiv\u003e\n\u003cimg style='font-family:\"Helvetica Neue\", Helvetica, Arial, sans-serif;font-size:15px;font-weight:400;letter-spacing:normal;text-align:start;white-space:normal;color:rgb(115, 115, 115);background-color:rgb(255, 255, 255);border:0px;max-width:100%;box-sizing:border-box' src=\"https:\/\/www.waveshare.com\/img\/devkit\/accBoard\/RPi-Relay-Board\/RPi-Relay-Board-intro.jpg\" slate-data-type=\"image\"\u003e\u003cp\u003eThe labelled layout identifies the relays, terminals and control connections for planning your project.\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv\u003e\u003ca style=\"color:rgb(123, 174, 35);box-sizing:border-box\" href=\"https:\/\/www.waveshare.com\/img\/devkit\/accBoard\/RPi-Relay-Board\/RPi-Relay-Board-1.jpg\" target=\"_blank\" class=\"\"\u003e\u003cimg style=\"border:none;max-width:100%;box-sizing:border-box\" src=\"https:\/\/www.waveshare.com\/img\/devkit\/accBoard\/RPi-Relay-Board\/RPi-Relay-Board-1_160.jpg\" slate-data-type=\"image\"\u003e\u003c\/a\u003e\u003c\/div\u003e\u003cdiv\u003e\u003ca style=\"color:rgb(123, 174, 35);box-sizing:border-box\" href=\"https:\/\/www.waveshare.com\/img\/devkit\/accBoard\/RPi-Relay-Board\/RPi-Relay-Board-2.jpg\" target=\"_blank\" class=\"\"\u003e\u003cimg style=\"border:none;max-width:100%;box-sizing:border-box\" src=\"https:\/\/www.waveshare.com\/img\/devkit\/accBoard\/RPi-Relay-Board\/RPi-Relay-Board-2_160.jpg\" slate-data-type=\"image\"\u003e\u003c\/a\u003e\u003c\/div\u003e\u003cdiv\u003e\u003ca style=\"color:rgb(123, 174, 35);box-sizing:border-box\" href=\"https:\/\/www.waveshare.com\/img\/devkit\/accBoard\/RPi-Relay-Board\/RPi-Relay-Board-3.jpg\" target=\"_blank\" class=\"\"\u003e\u003cimg style=\"border:none;max-width:100%;box-sizing:border-box\" src=\"https:\/\/www.waveshare.com\/img\/devkit\/accBoard\/RPi-Relay-Board\/RPi-Relay-Board-3_160.jpg\" slate-data-type=\"image\"\u003e\u003c\/a\u003e\u003c\/div\u003e\u003cdiv\u003e\n\u003ca style=\"color:rgb(123, 174, 35);box-sizing:border-box\" href=\"https:\/\/www.waveshare.com\/img\/devkit\/accBoard\/RPi-Relay-Board\/RPi-Relay-Board-4.gif\" target=\"_blank\" class=\"\"\u003e\u003cimg style=\"border:none;max-width:100%;box-sizing:border-box\" src=\"https:\/\/www.waveshare.com\/img\/devkit\/accBoard\/RPi-Relay-Board\/RPi-Relay-Board-4_160.gif\" slate-data-type=\"image\"\u003e\u003c\/a\u003e\u003cp\u003eThe lamp demonstration illustrates a separately assembled project, rather than an included lamp or ready-made phone-control system.\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv\u003e\n\u003cimg style='font-family:\"Helvetica Neue\", Helvetica, Arial, sans-serif;font-size:15px;font-weight:400;letter-spacing:normal;text-align:start;white-space:normal;color:rgb(115, 115, 115);background-color:rgb(255, 255, 255);border:0px;max-width:100%;box-sizing:border-box' src=\"https:\/\/www.waveshare.com\/img\/devkit\/accBoard\/RPi-Relay-Board\/RPi-Relay-Board-size.jpg\" slate-data-type=\"image\"\u003e\u003cp\u003eCheck the approximately 65.15 × 56.21 mm board outline when planning space in your build.\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv\u003e\n\u003cimg class=\"detail-desc-decorate-image\" src=\"https:\/\/ae01.alicdn.com\/kf\/Hfa30a23a3b6341898875cf1013ae628bx.jpg\" slate-data-type=\"image\"\u003e\u003cp\u003eThe package contains a relay board and screw set, so you can plan the remaining project parts separately.\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv\u003e\n\u003cimg class=\"detail-desc-decorate-image\" src=\"https:\/\/ae01.alicdn.com\/kf\/H46f84e33a29a4141913819bda48fc93cK.jpg\" slate-data-type=\"image\"\u003e\u003cp\u003eThe underside connector is for the compatible Raspberry Pi's 40-pin GPIO interface.\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv\u003e\n\u003cimg class=\"detail-desc-decorate-image\" src=\"https:\/\/ae01.alicdn.com\/kf\/Hd1ebc404b0f749f383fce321486198e0w.jpg\" slate-data-type=\"image\"\u003e\u003cp\u003eThe jumpers let you select the control-pin arrangement to suit your project connections.\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv\u003e\u003cimg class=\"detail-desc-decorate-image\" src=\"https:\/\/ae01.alicdn.com\/kf\/Hf332091bcf394b92a885a5b1162df5a9a.jpg\" slate-data-type=\"image\"\u003e\u003c\/div\u003e\u003cdiv\u003e\n\u003cimg class=\"detail-desc-decorate-image\" src=\"https:\/\/ae01.alicdn.com\/kf\/H6be86c45c17144a4aec9168950ec011el.jpg\" slate-data-type=\"image\"\u003e\u003cp\u003eThe mounted view shows the board alongside a Raspberry Pi; the computer is not included.\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv\u003e\u003cimg class=\"detail-desc-decorate-image\" src=\"https:\/\/ae01.alicdn.com\/kf\/H539012a6d5124442b9b0e1584e5e025f1.jpg\" slate-data-type=\"image\"\u003e\u003c\/div\u003e\u003cp\u003eProject reference: \u003ca style=\"color:rgb(123, 174, 35);box-sizing:border-box\" href=\"http:\/\/www.waveshare.com\/wiki\/RPi_Relay_Board\" target=\"_blank\" class=\"\"\u003ewww.waveshare.com\/wiki\/RPi_Relay_Board\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003eAdd the relay board to a compatible Pi project when you need three individually switched outputs.\u003c\/p\u003e\u003cp\u003eExplore more in \u003ca href=\"https:\/\/spy-shop.com\/collections\/electronic-components\"\u003eElectronic Components\u003c\/a\u003e.\u003c\/p\u003e","brand":"Spy-shop.com","offers":[{"title":"3 Channel Relay","offer_id":64123868315978,"sku":"1005006544548852-3 Channel Relay","price":60.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0764\/5980\/2954\/files\/H41b001091b334095bb83e2d0490db8c9X.webp?v=1793144816","url":"https:\/\/spy-shop.com\/sv\/products\/3-channel-relay-expansion-board-for-raspberry-pi-5-4b-3b-strong-electricity-3-way-relay-controls-module-for-smart-home","provider":"Spy-shop.com","version":"1.0","type":"link"}