White LED Flashlight Conversions
Home Built LED Lighting
THINGS TO MAKE AND DO
(Some of which might be dangerous. So do them at your own risk)
Last weekend I built a wind speed meter based around a cheap (NZ$15) cycle computer that I picked up in a camping store sale.
The cycle computer sensor is mounted on the circumference of a freely spinning plate (in my case a peanut butter jar lid screwed to a sliding door castor) which is surrounded by three rounded cups (baby food cups, NZ$4 the set) and mounted on a pole (an aluminium towel rail). All parts are either naturally weather-resistant (e.g. plastic or aluminium) or made so (e.g. varnished the wood, used silicone sealant to prevent water getting in). The unit was assembled and then calibrated out the window of a moving car.