On 3/28/08, Apptech wrote: > I have a number of low cost 2kg digital kitchen scales that > I bought in an endline batch because they perform extremely > well for the price. Extremely handy for small dynamometer > torque arm use - and for weighing things. > > I recently found that they are badly affected by the > proximity of an operating GSM cellphone. Their display goes > quietly mad running up and down and or sitting at random > values. Remove phone from area and all is well again. Range > of effect is up to about ?500 mm?. Try a faraday cage for the scale electronics. However a GSM phone works inside a faraday cage made by 0.2mm steel which is grounded only in one point. One avalanche surviver was able to phone to the resque team below 1m of snow. It was his luck, it's allive. The wave propagation theory is quite weird when it's about practice, a wrong faraday cage acts as an antenna. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist