Ground loop elimination in video systems does not always ask for a complete isolation of the grounds. There are passive hum suppressor transformers that will very effectively remove the hum from the video signal, but do not affect the video signal otherwise. Those special transformers act like a common mode coils, which stop the annoying →
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 →
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, →
You may know what the inside of a PC looks like, but what about the parts which make up your PC components? Your Hardware Exposed! 22 PC Parts Bare All article has pictures what is inside hard drives, keyboards, soundcards, and a plethora of other PC hardware. Just to see what makes them tick. →
Open Source Licenses document Zack Rusin published at KDE web site gives a good overview of different open source licenses. Here you can find the most important details of the most commonly used open source licenses in a very compact easy to understand format. →
3D Projection on buildings video at http://www.loodzwaar.com/2009/07/21/3d-projection-media/ shows amazing visuals that can be made by projecting 3D graphics to buildings. Take a look at this video. →
Power and Grounding for Audio and Audio/Video Systems – A White Paper for the Real World is a “White Paper” that attempts to cut through the confusion and set out a collection of good engineering practice that is both safe and effective. This 37 page technical document is worth to read for everybody who works →
More than a year ago I was approached by an independent filmmaker about light dimmers. The problem fo them was how to get affordable light dimmers to control the film lighting. I was told that many independent non-commmercial filmmakers use a HarborFreight router speed control to dim the lights used for moviemaking. The reason is →
Learn how to roll audio cables to avoid tangling. There are several good videos on Internet which tech you how to do that. How to Set Up PA Systems : How to Roll Audio Cables video gives you instructions how to roll audio cables to avoid tangling and tips on PA sound system setup.V1 Cable →
Ryan Joyce – Arena Show Time Lapse is a video that shows how a magic show is built up. The video starts from unloding the truck and ends with the images from the show. This is how arena shows are built professionally. →