What technology? Are you guys some amazing scientists? A normal person got zero knowledge about how any tech works. Even if they might think otherwise. Would you be able to build a TV in the XIV century? You'd need to know how every single part was made, how to acquire electricity and many other things.
An average person is focused on their one singular field of study and that's it. That's how we function as a society. It's not one person who makes literally everything. Even if his surname is Tesla. It's the millions and billions of people, each thoroughly invested in their own thing, who make things happen.
If it's purely theoretical, you might be able to introduce something. Like if you are a thoroughly trained physicist, you might be able to introduce some theoretical knowledge that largely won't be implemented any time soon. If you are an enormous genius like Sidis or Da Vinci, you might be able to indeed build something, but it won't be anywhere near its modern counterparts anyway.
Anyway, 99.9% of people wouldn't be able to bring up any tech. Worthwhile or not so.