Archive for September 2009

U2 concert setup time lapse

YouTube video U2 360 tour hampden park time lapse is a time-laps of the u2 concert being set up in Hampden Park Scotland. According the video decription I took over 3000 photos 1 minute apart over several days to create this five minute video.

Filter injects noise

RC filter or amplifier’s lowpass filter at the input of a delta-sigma ADC is normally put there to reduce noise. But sometimes adding a filter can produce a noisier digital output than without that filter. Using an analog filter to inject noise article tells that it is as easy to eliminate higher-frequency noise with an

Augmented Reality in a Contact Lens

Researches are developing a new generation of contact lenses built with very small circuits and LEDs. They promises bionic eyesight in the future. Bionanotechnology researcher Babak A Parviz writes about his research toward producing a computer interface in a contact lens at IEEE Spectrum article Augmented Reality in a Contact Lens. The author states that,