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Designing & Installing A Hearing Loop For The Deaf, Pt.2
20 October 2010
Last month we introduced the subject of hearing aid inductive loops and explained how they were designed. We also mentioned that most amplifiers could be used to drive hearing loops, albeit with a bit of tweaking in most cases. Now we move on to some of the commercial equipment designed specifically for driving hearing loops.
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Two Toslink-S/PDIF Audio Converters To Build
16 October 2010
Do you have a DVD or CD player with a TOSLINK (optical) output but only coaxial S/PDIF inputs on your amplifier? Or do you have the opposite problem? What about hum from your speakers when running digital audio via a coaxial cable? With these simple converters you can easily solve these problems.
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Digital Controller For Christmas Light Shows
12 October 2010
Want one up on your neighbours? Instead of a static Christmas Lights display (so passe!) now you can have the ultimate in Christmas extravaganzas. This amazing controller will bring your Christmas lights to life, making them flash, dim up and down, you name it, all in time with your favourite Christmas music. It's easy to build, easy to connect and, best of all, easy to program!
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Circuit Notebook
10 October 2010
Interesting circuit ideas which we have checked but not built and tested. Contributions from
readers are welcome and will be paid for at standard rates.
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Jamboree On The Air . . . And Now The Internet
08 October 2010
On October 16 and 17, up to half a million Scouts and Girl Guides from around the world will join together by radio and the internet in what has become known as JOTA - the Jamboree on the Air - and now JOTI, the Jamboree on the Internet.
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A High-Quality DAB+/FM Tuner, Pt.1
06 October 2010
We know you've been waiting for it and after more than a year in development, we are delighted to present this world-first high performance DAB+/FM stereo tuner design. It has all the bells and whistles of DAB+ in a sleek pro-quality case, with all features accessible by remote control.
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Eye-Fi: Wireless Digital Photography
02 October 2010
Digital cameras and memory cards are fantastic - no more worrying about the cost of film, the cost of developing and printing . . . you can shoot to your heart's content. But then you have to "upload" all those photos to your computer. What if you didn't even have to do that - they just appeared on your PC all by themselves?
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Electrolytic Capacitor Reformer & Tester, Pt.2
25 September 2010
Last month we introduced our new electrolytic capacitor reformer and tester - ideal for anyone working with vintage radios, valve equipment or indeed the hobbyist who has gathered a collection of electrolytics over the years. Now you can not only test them, you can (usually!) breathe new life into them if they've suffered from the ravages of time!
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Charlieplexing: What It Is & How It Works
21 September 2010
"Charlieplexing" is a multiplexing technique for driving displays and is particularly suited for use with microcontrollers. It reduces the number of outputs required to drive a given display but implementing it can be a little tricky. Here is an in-depth explanation of how it works.
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Build A Hearing Loop Receiver
19 September 2010
This receiver is designed to pick up the signal from a hearing loop and will drive a pair of headphones. You can use it with a hearing loop you install in your own home or with commercial loops already installed in halls and churches.
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