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4-Axis CNC Hot-wire Foam Cutter (Arduino+Ramps1.4)
How to Make a Ball Launcher
LOW COST DIY 500€ CNC MILL
DIY Corner Shelves
DIY PCB Milling Machine - Part 3 - X and Z Axis
all of the links are dead. Can you fix them? How to Install the Scratch/Arduino CommunicationHow to Configure your Bluetooth Module for the Communication between Scratch and ArduinoMobile Robotics with Scratch: Preparing your Linux PC, Arduino and Scratch to communicate wireless via Bluetooth
The author of this instructable explained how to make the spool. Follow his instructions. There in nothing in the center of the spool. I used a variable power supply and varied the voltage as part of the experiment. Magnet upside down? I don't know what you mean. You can design it so that the magnets will repel the electromagnet or attract. You can experiment to see if one way works differently than the other which is part of the fun. Thanks.
Hi Dave, I think the user dbmellen was asking me about the 3D printed parts I made. This comments section is a bit confusing. There is just that little arrow pointing to me. Anyway I will answer dbmellen shortly and respond to him here.
I sent the answer to your question in a private message to you since it was kinda long and this is not my instructable. thanks
Hi Dave, Thank you for your instructable. I used it to teach my daughter, starting at "what is a magnet". Then we made an electromagnet with a nail and coiled wire, and worked our way up to the fidget motor with reed switch. I have access to a 3d printer so I designed some parts to hold the magnets and spool, so I could hold the whole thing in my hand. Since every kid has one of these useless toys in their pocket, why not trick them into learning something :)? To wrap the wire around the spool, I stuck a pencil into my hand drill, then put the spool onto the pointed end of the pencil. Thanks again. Here it is in action: https://youtu.be/X0RGxPEvAjo
Fidget Spinner to Brushless Motor
Arduino Drawing Robot
Beginner's guide to ESP8266 and tweeting using ESP8266
ESP8266 mini Tutorial
Cherry- 60€ 3D-Printer
Personalized 3D Printed PEZ Dispensers
3D Printed Custom Candy Dispenser Topper
3D Print a Fully Functional Key
How to build a laser (general guide)
Arduino Mini Pen Plotter
White Chocolate Banana Brownies
Pocket laser engraver.