ePanorama.net

All about electronics and circuit design

Ground loop common-mode compensation

Ground loops affect video signals. Understand them, then deal with them. When designing or installing the cables for a video transmission system, one assumption that engineers commonly make is that the local earth grounds of both ends of the cable are the same. When circumstances don’t support this assumption, the video performance can exhibit gross

VIA GRA

This is quite funny logo for an IC. This VIA GRA HT8501 is a real chip used on PC motherboards. The question is the naming of the chip intentional or just happened by accident? Original image source:http://leenks.com/gallery1046-58.htm

Build a Mechanical Computer

Build Your Own Digicomp Mechanical Computer! tells about a plastic mechanical computer from the 1960s. It offered three bits of tabletop computing, back in an age where corded telephones were considered high-tech. According the article Digicomp started a bunch of kids on a career in computers. Now a member of “Friends of Digicomp” Yahoo Group

Default Password List

Default Password List has saved the day several times when working with different network equipment. When the instructions are missing or the information on default passwords is very well hidden within the documentation, the Default Password List will give you the password information you quickly.

Failed Office Pranks

Practical jokes do not always go well. Sometimes the most innocent jokes have the most tragic consequences. 8 Innocent Office Pranks That Went Horribly Wrong web page shows you eight videos of office pranks that did not work as expected.

Making of Space Chair Ad

John Huntington’s Entertainment Technology Blog has an interesting posting Toshiba’s Very Cool “Space Chair”Ad. It consists mainly of two videos. The first video shows the cool Toshiba TV ad. The second video is the “Making of” video. It tells how the ad was made using several high definition cameras rigged to a big weather balloon

Academia vs. Business

xkcd webcomic has today a funny comic about difference between academia research and business. Check out that Academia vs. Business strip yourself on the comic web page (the comic strip picture is too big to fit to the layout of this blog so I could not add it nicely here).

Passive Ethernet Tap

Construction and Use of a Passive Ethernet Tap article provides straightforward instructions on how to construct and use a passive Ethernet tap. It allows you to monitor Ethernet traffic on with any hub or switch and any operating system. A passive Ethernet tap is useful when installing an intrusion detection system (IDS) sensor or when