So I catch the innertubes over to OhGizmo this morning and happen upon news of one of those forehead poundingly obvious products that someone should have brought to market decades earlier., Too wit: Self Adhesive Wrapping Paper Well, duh. Take wrapping paper, coat the back with Post-It strength contact adhesive, roll it up, and make […]
Charles writes in and shows you how to make a wind powered LED out of a VCR. I was inspired by all of the nonsense about the format wars lately, and after breathing a sigh of relief that the HD-DVD Blue-Ray fiasco has ended I was reminded of the VHS and Betamax war of yesteryear. […]
Brian writes in… Recently, I wanted to network my media center in the living room of my apartment. I was not satisfied with running an ethernet cable down the hallway and putting holes in the wall was not an option. Thats when I thought of running the cable through the air duct, my 555 based […]
Once you have made your ignition coil, you may want to try making an induction heater. Here is how they work: When an alternating electric current is passed through a coil, the coil creates a magnetic field. The magnetic lines of flux cut through the air around the coil. If a ferrous material, such a […]
Jean-Pierre Martineau made an instructable for making a pocket-sized watercolor set from an Altoids tin and some Fimo clay. Portable and practical!
Ignition coils are a cheap way to have some high voltage fun. You can usually find them in old cars or a used parts shop. They need a special circuit to work outside of the car; fortunately it’s fairly easy to make one. Ignition coils are essentially pulse transformers. Transformers that work using pulses of […]
Here is a fairly easy way to make a digital balance. It is able to measure amounts less than 1 milligram. A balance with this resolution is still be fairly expensive, so building one may be a great solution for those budding chemists with a limited budget. Digital balance
