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Issue 264 << Issue 263 | Issue 265 >>
Publisher's Letter

1 Sep, 2010

Review: Fusion 600 Marine A/V Series

3 Sep, 2010

Boaties like to have access to radio, music and on larger vessels, video. Whether they are cranking the music up on the long run to fish the continental shelf, relaxing at anchor or keeping track of weather reports, they want performance and state-of-the-art gear.

Circuit Notebook

5 Sep, 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.

Ultrasonic Anti-Fouling Unit For Boats

7 Sep, 2010

Marine growth on the hull is the bane of all boat owners. Left unchecked, marine growth slows the boat down considerably and if it's a power boat, leads to large increases in fuel consumption. If it's a yacht, marine growth will also slow it down and make it less manoeuvrable, to the point where it becomes very sluggish. The cure is to haul the boat out of the water every year and water-blast and scrape away all the growth and then coat the hull in toxic anti-fouling paint.

LED Replacements For Fluorescent Lamps

9 Sep, 2010

36W fluorescent tubes are the main source of light in supermarkets & retail stores, offices and many factories. There are hundreds of millions of them in use around Australia and many billions in use around the world. But while they are the most efficient light source in offices and the home, they are now being challenged by LED tubes which can directly replace them.

Serviceman's Log

11 Sep, 2010

Faulty electrolytic capacitors have been a common problem in electronics gear over the last few years. In fact, some items only just make it through warranty before their power supply electros develop lumpy bits and fail.

High-Performance Microphone Preamplifier

13 Sep, 2010

Some recording devices, especially computer sound cards, have poor sound quality or insufficient gain when used with certain microphones. This tiny module provides a line level output from an unbalanced or balanced microphone and has very low noise and distortion. It runs off 5-20V DC, consuming just 6mA.

Designing & Installing A Hearing Loop For The Deaf, Pt.1

15 Sep, 2010

Many people have hearing impairment. Whether they are watching TV, listening to radio or music, attending a concert, meeting or religious service, they have difficulty hearing, or understanding, what is going on - and that may be in spite of using a hearing aid. Hearing loops, which inductively couple an audio signal to a hearing aid, are an increasingly common method of helping ease that difficulty.


17 Sep, 2010

Letters and emails should contain complete name, address and daytime phone number. Letters to the Editor are submitted on the condition that Silicon Chip Publications Pty Ltd may edit and has the right to reproduce in electronic form and communicate these letters. This also applies to submissions to "Ask SILICON CHIP" and "Circuit Notebook".

Build A Hearing Loop Receiver

19 Sep, 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.

Charlieplexing: What It Is & How It Works

21 Sep, 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.

Vintage Radio

23 Sep, 2010

Valves reigned supreme in the electronic world for more than 40 years, being the essential components of radio receivers, transmitters, early computers and many other devices. When television first came to Australia, it was black & white and the sets used valves. It has now been 50 years since the end of the valve era.

Electrolytic Capacitor Reformer & Tester, Pt.2

25 Sep, 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!

Ask Silicon Chip

27 Sep, 2010

Got a technical problem? Can't understand a piece of jargon or some technical principle? Drop us a line and we'll answer your question. Write to: Ask Silicon Chip, PO Box 139, Collaroy Beach, NSW 2097 or send an email to

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