Products

DIY fiber optic microscope

Fiber optic microscopes are used to inspect connectors to check the quality of the termination procedure and diagnose problems. A well made connector will have a clean, smooth, polished and scratch free finish. There is not be any signs ofcracks, chips or fiber not even with the ferrule front. The magnification for viewing connectors can

The anatomy of a modern audio-video amplifier

A modern Audio-Video amplifier/receiver (AVR) is an exceedingly complex piece of consumer electronics, requiring expertise in many aspects of analogue and digital audio and high definition video, plus considerable software skills. ‘The anatomy of a modern audio-video amplifier’ lecture by John Dawson from Arcam for Audio Engineering Society UK is an interesting talk on engineering

Cool Computer Keyboards

Computer keyboards are peripherals partially modeled after the typewriter and designed both for the input of text and characters and also to control the operation of a computer. Keyboards can arrive in many shapes or sizes. 14 Cool Computer Keyboards for Geeks shows you a set of extraordinary and interesting computer keyboard designs currently available

How an expensive Blue-Ray player is made

AV Science Forum has an interesting posting on Ayre DX-5 blueray player. The article claims that Ayre DX-5 bluray player is a modified Oppo BDP-83 blueray player and even describes the modifications made to the device. Interesting article indeed to read, although I am a pretty skeptic would those modifications be worth of all of

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

Nokia N900

I had yesterday change to play a little bit with Nokia N900 mobile communicator at at Expert Expo in Helsinki. This brand new Nokia smartphone that you can’t yet buy anywhere, just pre-order. This device runs on Maemo Linux operating system and worked well. This device felt much better than Nokia N97. The tough screen

Digital audio isolation

Isolator for digital audio is needed in cases where coaxial S/PDIF digital audio link forms a ground loop in your audio system. Typically in coaxial S/PDIF connections the coaxial cable shield is connected to equipment cases. This arrangement easily creates ground loops which can cause noise problems in various places in audio system. A suitable

Build a Ground Loop Detector

Ground loops are a common problem in many experimental setups. A ground loop is an un- wanted closed loop of cables in the setup, most often through the ground system. Those ground loops are often hard to find and debug. A Ground Loop Detector document describes how to build and test a simple system to