I saw an interesting article at Controlgeek blog titled America’s Got Talent Buzzer Show Control. It tells how the judge buttons work in the “World’s Largest Talent Show”. Those buttons sound a loud buzzer sound effect, fire a bunch of strobes and light cues, and trigger video on large upstage video wall. Often on TV, →
I bought Fuji HS20 camera few months ago (just some months before the model was discontinued). HS20 is a pretty good superzoom digital camera. It has a very long zoom lens and good macro properties. I have taken many of the photos posted recently to this blog using this camera. To take good macro photographs →
A class-D amplifier or switching amplifier is an electronic amplifier where all power devices (usually MOSFETs) are operated as binary switches. They are either fully on or fully off. The term “class D” is sometimes misunderstood as meaning a “digital” amplifier. While some class D amps may indeed be controlled by digital circuits, the class →
The International Committee for Display Metrology (ICDM) and The Society for Information Display (SID) have published a new standardized way to measure electronic displays. Information Display Measurements Standard (IDMS) document consists of standard measurement procedures to quantify electronic display characteristics and qualities. The hope is that Information Display Measurements Standard (IDMS) serves standards organizations that →
CAT 5, 5e and 6 UTP (unshielded twisted pair) cables are the most commonly used communication wiring in building. Those wires are normally designed to carry signals like Ethernet and telephone. Those wires can be also used to carry many other signals. Some signals can be directly wires to them (with suitable adapter cables) and →
UNDERSTANDING, FINDING, & ELIMINATING GROUND LOOPS IN AUDIO & VIDEO SYSTEMS – 2005 Generic Seminar Template is a very good collection of information on ground loop problems on audio and video systems. The writer Bill Whitlock from Jensen Transformers really knows what he is talking about. Here are some fact points picked from document: The →
When I was a kid, there was a periscope you could make out of a cardboard tube and two small hand mirrors to see around corners. Now there’s a video camera system that can do the same. Camera Can See Around Corners and Femtosecond Camera Sees Around Corners articles tell that Scientists at the Massachusetts →
I have updated three popular documents at ePanorama.net: Powering microphones document is updated with cleaner drawings of electret mic to XLR adapter circuits. 3D glasses and other 3D display devices has completely rewritten introduction to 3D glass technologies. This has been a document that has been viewed very often in the site and I felt →
Power over Ethernet (PoE) offers convenience, flexibility, and enhanced management capabilities by enabling power to be delivered over the same CAT5 cabling as data. This technology is especially useful for powering IP telephones, wireless LAN access points, cameras with pan tilt and zoom (PTZ), remote Ethernet switches, embedded computers, thin clients and LCDs. The original →
Television technology is developing rapidly. Consumers are just gaining access to the 3D TVs when the next disaster is already on the way. Maybe the next revolution is Super Resolution HD-TV. It seem stat we are entering post-fullHDTV resolution (1920×1080) era. Just few years ago full HD was considered the ultimate resolution that everybody were →