The connection between Arduino and Ethernet modules are made as shown in the circuit diagram. Connect pin 5V and GND pins of Arduino Nano to +5 and G pin of Ethernet Module respectively (These ...

The standard way to connect a serial port (RS232) to an Arduino (or any 0V/5V based serial interface) is to use a dedicated IC like MAX232A. With this IC, you don't need a 9V battery like with my ...

PWM pin of Arduino goes to gate of mosfet; GND pin of Arduino goes to source of mosfet. Do connect it there or circuit will not work. Connect potentiometer’s extreme terminals to 5v pin and GND pin of ...