![]() ![]() Warning:Pay special attention to the voltage that is over 38 volts. NOTE:The Arduino board requires an external power supply to drive the xbee module and relays. Its function is to act as a complementary board. A shield is simply a printed circuit board that is placed on the ARDUINO board and connects to it by coupling its pins without the need for any other external connection. This arduino relay shield is an ideal solution for home automation and robotics applications. This project is a sequence of SHIELDS for ARDUINO UNO that will help us a lot in our tests. It can be controlled with low voltages, like the 3.3V provided by the ESP32 GPIOs and allows us to control high voltages like 12V, 24V or mains voltage (230V in Europe and 120V in the US). ![]() With built-in Xbee socket, it can be wireless remote controlled via Xbee/ bluetooth/WPM. A relay is an electrically operated switch and like any other switch, it that can be turned on or off, letting the current go through or not. The max switching power DC 90W or AC 360VA gives direct control by Arduino Uno/ DFRduino controllers through digital I/Os with external 9V supply. The Arduino controls the relay, and the relay controls the device. Hence, its general use is to cut off/supply power to a device using commands from the Arduino. This Arduino Shield is a completely newly designed that is able to control 4 relays at a time. What is the functionality of the relay shield A relay is simply a switch that operates on electricity and can be turned on/off using low voltage signals. With relays you can now connect external circuit or devices directly to your Arduino. Relays allow for interfacing an external electrical circuit like a switch. But interfacing with high power and AC is quite a dangerous task when building the circuitry. One of the most interesting projects for your boards is perhaps being able to control High power devices like Lamps, water pumps, garage doors and so on. It is commonly used to control anything over 5V such as lamps, water pumps and garage doors. The shield is compatible with all the Arduino boards, 5V and also 3.3V standards.This Relay Shield for Arduino acts like a switch. Note that the distance between digital pins 7 and 8 is 160 mil (0.16"), not an even multiple of the 100 mil spacing of the other pins. Four screw holes allow the Shield to be attached to a surface or case. The maximum length and width of the 4 Relays Shield PCB are 2.7 and 2.1 inches respectively. Both connect to the same TWI interface to allow you to create a chain of TWI devices.
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