Technique is a way of doing something. For example, "The technique you used to play that note was brilliant!" or, "You need to work on your technique."
Technology are things invented by humans to be able to control and modify what is around them and to make life easier. Screwdrivers, hammers, guns, etc. those are all technology, but, usually when technology is said, the speaker is referring to "computer technology". Computer technology consists of things like computers (of course), anything inside the computer, electronics, etc. Technical is an adjective. It means having knowledge in a certain field.
Technique is a noun
Technology is a noun
Technical is an adjective
examples for technology and technical:
"Who would've thought technology would be where it is today?"
"You're really technical with your moves."