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A single-channel relay is an electronic switch that can be controlled by a low-power electrical signal, such as the output from an Arduino microcontroller. By using an Arduino Uno and a single-channel ...
module which we have created above (3.1) has 4 relays. We should set pin number and pin mode for each relay. As an example, look at the figure below! Arduino Uno and 4 Relay Module are connected. If ...
Whenever we need to connect any AC Appliance in our embedded circuits, we use a Relay. So in this arduino relay control tutorial we will simply learn How to interface a Relay with Arduino. Here we are ...
The relay module will need 5V from Arduino to power up and will get input from four different digital pins of the Arduino. Now let’s connect the relay module to your home appliance. Take the positive ...
I have used D1, D2, D5 & D6 GPIO pins to control the 4 relays. **The Boot will fail if RX is grounded during the Boot process of NodeMCU. So, connect the LoRa module after giving the supply to NodeMCU ...
Looking for practical Arduino projects? This guide shows how to control a relay from your smartphone using an Arduino Uno — either via Bluetooth or Wi-Fi.
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