4 Relay Module No products found ... in our project, we will use it in Normally Open mode which means when the relay is switched off the circuit will be broken. The relay module will need 5V from ...

So in this DIY project, we make a 4 ... Relay Module, we have used an Arduino Uno board for controlling relays. All four relays are connected with Arduino at 8,9,10 and 11th pins (In1, In2, In3, and ...

Here we have provided PCB layout, circuit diagram, and Gerber files so that you can build or directly order this Relay Driver Module. Previously we have built 4-channel Relay Driver Module, but this ...

1 and its complete circuit diagram in Fig. 2. It is built around Arduino Uno R3 (Board1), HC-05 Bluetooth module ... each relay. An actual-size PCB layout for the home automation system using Arduino ...

Connect the IN (or signal) pin of the relay module to a digital pin on the Arduino (e.g., pin 4). Connect the GSM Antenna: Attach the GSM antenna to the designated port on the SIM900 GSM shield. Power ...