Knex Automated Door Closing Device

This is the one and only Knex door closer. I admit it is not the best but it works fine. You can even close the door from far away by adding a string to the pin.

This is the main part. It holds the counterweight. It is possible to make the tower 1 gray rod higher to shut the door even farther.
I Know a lot of the pictures are out of order but please try your best. If you have questions feel free to ask.

You need 2 D batteries for this. Duracell are the heaviest.

It is the pulley that closes the door. To see how to set it up watch the video or look at the next step.

It is hard to explain and I have no pictures, but I'll try my best. Place the door closer on the back side of the door near the hinges. the open part on the frame should be facing the door. the other part goes on the opposite side with a weight on it. Please watch the video and refrain from asking too many confusing questions. Mods:place this wheel to make the door close faster.

Wow. even more marvelous things to look at. Sorry I don't have anything yet.