You can not control switching on/off your home lamp or laundry directly with arduino or microcontroller. To do that you need relay module.

This relay module is connected to a current  source so that you can switch them on and off using Microcontroller or Arduino.Using these relays you can easily control high power devices or appliances using arduino or microcontrollers, the relay is rated for 230V 10Amps.

Specifications

Rating:  10A  (250V AC or 30 V DC)

Input (Control) voltage: 5V DC