The Wasp Bag Pattern
Melissa points us to Machen Machen’s free Wasp Bag pattern. It’s lined complete with a key strap and an inside pocket! Link.
Month: September 2007
DIY LM317 power supply
Here’s how to make a DIY LM317 power supply… Being able to poke voltages into your projects will help you debug. You can buy an adjustable power supply for $50 or so, or build your own from a kit (another one) Just look for any power supply kit that has a LM317 in it. You […]
Old Skool Nintendo Controller Coin Purse
The.deadly.mrs on Craftster shows you how to transform an old skool Nintendo Controller into this fun coin purse. Thanks Leslie! Link.
Fabric Bucket Tutorial
Stacey points us to these adorable and handy fabric baskets which are perfect to hold all your craft supplies. Check out this great tutorial by Jodie at Ric-Rac.Link.
HOW TO – Make a RFID pet food access control system
Mlarsen writes – In this instructable I will explain how to make a simple RFID pet food access control system. This system uses a stand-alone RFID system that can be purchased either pre-assembled or in kit form if you desire to do the soldering yourself, and also wish to save a few dollars in the […]
Magnetic levitation mystery
The latest Gadget Freak has a bit of a mystery to solve – Nathan Loden’s Magnetic Levitation experiment started with the basic problem of stabilizing a frictionless position control loop with inherent metastability. A fast controller with phase-lead compensation took care of that. Then he discovered a strange phenomenon: The levitated object begins and continues […]
HOW TO – Measure the drag coefficient of your car
iwilltry writes – The purpose of this experiment is to determine your vehicle’s drag coefficient Cd and coefficient of rolling resistance Crr. This is done by measuring your vehicle’s speed as a function of time while coasting in neutral. Why would you want to know Cd and Crr for your vehilce? Well, suppose you’re interested […]