I guess you'd like to know which verb is proper to use to switch on/off some devices.
It depends on what kind of device you are to use it for, but we often use つける／消す for on/off.
Here are some examples:
換気扇(extractor fan)、洗濯機(washer)を 回す／止める
電源(power source)を 入れる／切る
I hope this will give you more ideas!