Arduino Relay Driver Shield Circuit Diagram: In this 3-Channel Relay Driver Circuit, we have used an optocoupler to trigger the NPN transistor which further drives the relay. And optocoupler will be ...

One of the most useful things you can do with an Arduino is control higher voltage (120-240V) devices like pumps, fans, lights, heaters etc. Since the Arduino operates at 5V it can’t control these ...

an Arduino board (this was developed on a Leonardo, but should work with any other Arduino board) one Arduino digital pin for each relay, by default pins 2 to 8 are used; 1 to 8 relays which can be ...

If so, remember to connect the VCC pin to 5V of the Arduino board to enable the control input pins IN1 and IN2. Also note at this point that, if you want perfect galvanic-isolation, do not link ...

We build the RFID Reader and Arduino-Uno Interfacing Based automatic liquid dispenser to restrict the quantity to avoid wastage. ... Relay, 5V DC SPST (R1, R2) 2: In this proposed project, the ...

Arduino UNO/ Arduino mega 2560r3, Flame sensors [(x 3 pieces) out of which 1 has 4-pins and other 2 has 3-pins], Servo Motor (SG90)[x2 pieces ], L298N motor Driver module, Mini DC Submersible Pump, ...

A 5V single-pole, double-throw (SPDT) relay used to control the load (230V AC, 60W bulb) acts as a switch. The 5V power supply is connected to the 5V (Vin) and GND pins of the Arduino Nano to enable ...

When everything’s plugged in, this is how your Arduino, motion sensor, and power relay should look. ... The side connector pins will go into the Arduino’s ground (GND) and 5V sockets.