Archive for the ‘Hardware’ category

Radio Microphones – Legal and Usable Frequencies

October 25th, 2009

wave 150x150 Radio Microphones   Legal and Usable Frequencies
Here in the UK, we need to be careful about what frequencies we set out radio microphone receivers/transmitters. Even if your radio mic set has 1,400  available frequencies only a few are usable legally without a license. Hopefully this page covers the basics and give some practical advise in using radio microphones.

» Read more: Radio Microphones – Legal and Usable Frequencies

Recover a Clicking Hard Disk Drive (In the Freezer)

September 10th, 2009


(Again, not really video related, but if you have videos or music on a hard disk that is broken, then I suppose this would be relevent!)

A friend of mine has a laptop that won’t boot windows… he took it to a local computer shop and they said they couldn’t fix it or recover the files… This is how I helped him, with the aid of my freezer!

» Read more: Recover a Clicking Hard Disk Drive (In the Freezer)

Reducing Feedback in a PA System

September 4th, 2009

Want to know how to reduce feedback? How to minimise Feedback? How to set up microphones and speakers so as to reduce feedback? – This page will give you some helpful ideas and tips to make things sound nice.

music_bar - Feedback ArticlwWhat is Feedback?

Lots of ways to help you reduce audio feedback in your PA system

Feedback is the screeching/squealing/hooting sound heard when there is an accidental loop in the PA system. That is when the sound from a microphone is amplified and fed to the speakers and then picked up again by the microphone, this sound then carries on round and round resulting in the nasty noise. The feedback frequency depends on a number of factors such as: the resonant frequency of the room, distance of microphone and speakers, frequency response of the microphone, characteristics of musical instruments.

To reduce or eliminate feedback this loop needs to be broken, here are a few ways of doing that. » Read more: Reducing Feedback in a PA System

PowerPoint Test Pattern for Calibrating Projectors

September 2nd, 2009

free test patternSetting up a video projector isn’t as easy as you first may think.  Leaving the settings on the default values may not give you the best image possible. » Read more: PowerPoint Test Pattern for Calibrating Projectors