Hi, Thank you for your reply @anon57585045. I need to know, because I was wanting to control a mini 5v humidifier, I wanted the arduino mega to switch on and off the humidifier depending on the humidity. The humidifier uses 2amps, if you would like the link to the humidifier, here it is: https://www.amazon.co.uk/Portable-Conditioner-Personal-Evaporative-Humidifier/dp/B08XMV34JZ/ref=sr_1_6?dchild=1&keywords=air+water+humidifier+230v&qid=1629277143&sr=8-6. Thank you.