Two for energizing the coil, one Common terminal, a Normally Closed terminal which will be connected to the Common terminal when the coil is not energized and a Normally Open terminal which will be in contact with the Common terminal when the coil is energized. That means it can control an electrical circuit by closing and breaking connections in that circuit.Īs you can see, there are mainly 5 terminals in a relay. Relays are switching circuits that can close and break circuits mechanically. What to do next? How about some home automation? In this post, I will show you how to set up a Matrix Alexa Home Automation system, that can turn on and off lights, fans or any electrical device in your home. So what all things we have now? A A Raspberry Pi, A MATRIX Voice, Alexa configured to work with MATRIX Voice and IFTTT.
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