Theodore Gray over on Popular Science launched a model rocket using Oreo cookies as fuel (Potassium perchlorate) – ” Food contains an amazing amount of energy. If you don’t believe it, feed candy to some kids and watch them bounce off the walls. Of course, tot-baiting is only one way to turn food energy into […]
Gezortenplotz writes – “Wind across a microphone causes distortion and unwanted noise for videographers and nature recorders while taping outside. The purpose of the microphone ‘blimp’ is to attenuate the wind noise without interfering with the desired sound. Blimps are expensive. This project came in under $40. Mics are interchangeable in this blimp [if the […]
Robin has some tips and suggestions for making your own “Biosphere” – “Biologists call the Earth’s environment and all organisms the Earth’s biosphere. But biosphere is also the name of a man-made and sealed environment, which simulates the earth’s biosphere. This could for example be in a bottle, or a greenhouse. Another (maybe more correct) […]
This looks like a fun kit for $64, make plasma balls, light up fluorescent tubes, make sparks… – “Solid state high voltage power supply is perfect for high voltage experiments, like Kirlian photography. The high voltage at the terminal won’t electrocute you, so its relatively safe, but it can burn you, so use caution. Can […]
Good camcorder hack from Dan @ Instructables – “We used the MIC jack of a camcorder to detect when the camcorder is on. We built a low-voltage solid-state relay to detect the MIC jack and automatically turn on and off a remote device at the same time as the camcorder. The solid-state relay is a […]
Mike Outmesguine’s Solar-powered Wi-Fi extender in the latest issue of Popular Science – “The promise of Wi-Fi is freedom–the ability to bring your laptop or PDA away from the anchor that is your desk and into your life. With most wireless routers, however, your life had better stop at around 300 feet, and forget about […]
Petercd writes – “Hands free Camber Gauge for cars made from angle iron, it can also be used to check castor too. Uses 2 small spirit levels and the read/write spindle and bearing from an old 250Mb hard drive for the pivoting plate and the spirit level.” – Link.
