JoyeMusic

This is a cool test with SEVEN GraviTrax magnetic cannons, including three that are home-made using 3D printing!! Cannons are super useful in GraviTrax because they let you get the marble up higher for longer runs. Amazon links: -- https://amzn.to/3pCkYFp (GraviTrax Starter Set - 1 cannon) -- https://amzn.to/3ohqywR (GraviTrax extra cannon) As an Amazon Associate I earn from qualifying purchases. So please use the link above if you decide to purchase anything! It doesn't cost you any extra, but I get credit for the purchase.

In this video, I show how to make a custom schematic symbol in KICAD 5.1.7 on Ubuntu Linux.

I show you how to install the Potensic App on on an iPad so you have a large screen for the quadcopter's built in video camera. It really works! -- https://amzn.to/3mU7umL Amazon link to Potensic Quadcopter A30W As an Amazon Associate I earn from qualifying purchases. So please use the link above if you decide to purchase anything! It doesn't cost you any extra, but I get credit for the purchase.

Here's how to make custom footprints for your PCB parts in KICAD on Ubuntu Linux.

This video shows several key elements of our very popular ping-pong ball wall maze. We use a small blower to return the pingpong balls to the top. It can blow about 3 balls at once. The tracks are 2" polycarbonate tubing cut lengthwise. -- https://amzn.to/3lSKNzz (Amazon clear tubing link) The flip-flop consists of laser-cut wood triangles I bought off Etsy, plus a bunch of roofing nails. The plinko board is made from roofing nails. The Tornado is some very heavy solid copper wire. I ran out or I would have made a second tornado! The Tree is a large piece where pingpong balls "park" in slots, hope over other pingpong balls already parked, and get kicked out of the parking spot occasionally by other pingpong balls. It was quite complicated to construct, but really cool.

This video shows a technique for untangling a difficult slinky using an unscrewing method. This method hasn't let me down yet!