How to Make Hydraulic Powered Robotic Arm from Cardboard In this video I show you how to make robotic arm from cardboard, it's quite fun to plaw with. Especially by moving coca cola cans. You need: ...

How to Make Mechanical 7 Segment Display from Cardboard In today's video I want to show you 7 segment display with unique mechanism that is our own invention. There are 7 circles inside. Each circle ...