Note The external power supply utilized above should be from a power supply or battery like a lithium battery. Schematic diagram showing a connection between a Relay Shield and Motor We will now regulate DC motor using Rela圓, then connect the relay shield and DC motor as it is in the diagram below.Next, use a USB cable to connect the Arduino to a computer.Start by mounting the relay shield on your Arduino development board.We’ll teach you how to use a Relay shield in the following section. Therefore, it’ll use NO and COM but not NC. Secondly, our setup operates on a normally open mode. Contrarily, different voltages on the four devices will require dissimilar high-voltage power adapters. You can use one high-voltage power adapter for the four devices controlled by a relay shield and a similar voltage.
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