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Issue 276 << Issue 275 | Issue 277 >>
Publisher's Letter

1 Sep, 2011

LED Lighting Explained

2 Sep, 2011

Ever since Philips Lumileds created the high power LED over 10 years ago, the rapid advancement and development of solid state lighting components has facilitated exciting new applications and innovations. If we gaze around our environment, we notice just how wide. spread the use of LED technology has become.

Ultrasonic Water Tank Level Gauge

4 Sep, 2011

Do you have a tank to collect rainwater? Do you know how much water is in it? This ultrasonic tank level gauge fires an energy burst which bounces off the surface of the water ? and then a microcontroller calculates how far down the tank water level is. Clever, eh!

Serviceman's Log

6 Sep, 2011

It's amazing how something that's relatively trivial can cause big problems. Of course, all problems are simple once you know what the answer is but they can be stressful in the meantime.

Can You Really Reduce Your Electricitiy Bill

8 Sep, 2011

With recent large increases to commercial and domestic electricity tariffs and promises of more to come, everyone wants to know how to reduce their electricity consumption. This can be done but it is neither simple nor easy. In this article we will review some strategies for saving power ? and debunk some of the scams around!

Improving The GPS-Based Frequency Reference

10 Sep, 2011

Did you build the GPS-based Frequency Reference described in the March-May 2007 issues of SILICON CHIP? Its frequency stability can be significantly improved with a couple of circuit changes, as described here. The modifications also make it easier to lock the oven crystal to the correct frequency.

World Record 111-Gigapixel Photograph

14 Sep, 2011

When it was "taken" late last year, the photo above of the city of Seville, Spain, was a world record at 111 gigapixels. If printed out, it would be bigger than two football fields. And you can zoom in to show amazing detail. But shooting such a photo was no mean feat...

High-Performance Stereo Headphone Amplifier, Pt.1

16 Sep, 2011

If you can't afford a high-performance amplifier and loudspeakers, you can still have the best possible hifi sound, with this headphone amplifier and a set of high-quality headphones.


18 Sep, 2011

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".

The Electronex Show Is Coming To Melbourne

20 Sep, 2011

New Melbourne Electronics even now Australia's largest with a world of test and measurement solutions!

Ultra-LD Mk.3 200W Amplifier Module, Pt.3

22 Sep, 2011

Power supply & quiescent current adjustment

Ask Silicon Chip

24 Sep, 2011

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

Upgrading An Ultra-LD Mk.2 Amplifier To Mk.3 Standard

26 Sep, 2011

This teensy PCB lets you add the vital modifications to an Ultra-LD Mk.2 amplifier to bring it up to Mk.3 performance. We are doing this so that all those people who built the Ultra-LD Mk.2 from the August-September 2008 issues will not be too annoyed with us for superseding it with the Mk.3 version. After all, we want to keep our readers happy and content!

Vintage Radio

28 Sep, 2011

Performance improvements for the Hotpoint Bandmaster J35DE console radio

Circuit Notebook  - 12 Sep, 2011

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