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Sensor-Triggered Toy Race Car Timer
[youtube:http://youtu.be/EXlDcKeUq14] Racing toy cars, like Pinewood Derby or CO2 dragsters, is a lot of fun.

Simple Silk-Screen Printing Using a Vinyl Cutter
Use adhesive “sign vinyl” for silk-screen printing without the aid of chemicals or a darkroom. It's easy!

Test Coin Cell Batteries with DIY LED Tweezers
I’ve always been interested in electronics, but when I started publishing projects professionally, I got interested in photography, too.

Skill Builder: Quick Tips for Using Vacuum Gauges
When you’re working with projects involving vacuum pumps, a vacuum gauge will show you the pressure in the chamber being evacuated.

Skill Builder: 4 Wire Strippers You Should be Using
The value of a good pair of wire strippers is often overlooked until they’ve disappeared from your toolbox.

Copper Tube Mini-Tool Organizer
Build a desktop stand for your essential small tools.

Combat Concepting with Cardboard
My robotics team refers to our design method as “C.A.D.,” nerd code for Cardboard-Aided Design

Really, Really Random Number Generator
No matter what kind of game you’re playing — whether itʼs Angry Birds, Grand Theft Auto, or an intense session of chess — you want the computer to behave unpredictably.

Folding clothes is a boring and laborious chore. So speed up the process by making a folding board out of cardboard and duct tape.

How to 3D-Print Hand Knobs for Any Hex Bolt
There’s a common argument that you can’t make anything useful on a 3D printer.

Bar top computer arcade
Take an unwanted desktop PC and build a bartop arcade gaming cabinet out of the parts.

Kids’ DIY “FUNiture” Kit
A “few” years back, as a final-semester project at the NC State University School of Industrial Design, I made a kit of plywood parts from which could be assembled several useful pieces of children’s furniture.