Por exemplo, this one is labeled input, one input, two three and four to control the relay. Then we have these four terminals that controls these four relays. You just need to connect the gnd leg to the gnd of the arduino and the vcc with the five volts. And if we apply five volts to this leg, its gon na close the circuit and the same thing for this module, it has four relays and each one we can control it with one of the legs. So if we dont apply five volts to this leg, the circuit is gon na be closed and if we apply the five volts, its gon na open the circuit.īut the other terminal is called the normally open which is open by default. This one is called the normally closed terminal which is closed by default. So we need to connect one wire to this terminal. We can set it to low and on the other side, we have three terminals. We can set this to high and to turn it off. Por exemplo, we have the vcc terminal and the ground one, and this one we use it to control the high voltage device, por exemplo, to turn it on. We use it to connect the high voltage devices and this one we use it to control the relay using the arduino. Gostar 220 volts using this relay, como você pode ver, we have two sides: this side. So we use this one as a switch to turn a lamp that works with a high voltage. Basicamente, its an electronically operated switch. Por exemplo, this one is just one relay and we have these four, but they work pretty much. So first of all lets talk about this relay, so we have different kind of relays. So before we get started, make sure to smash that subscribe button and the notifications bell and lets get started. So if you dont know what a relays dont worry, we are going to cover it in this video.
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