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Issue 280   View the articles in this issue >>
3-Input Stereo Audio Switcher Mailbag
Ask Silicon Chip Vintage Radio

31 Jan, 2012

3-Input Stereo Audio Switcher

Need more analog audio inputs for your stereo amplifier or home-theatre set-up? This 3-Input Stereo Audio Switcher will do the job. It works with an infrared remote control or you can just press one of the front-panel buttons to select a program source.

23 Jan, 2012

Mailbag

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".

21 Jan, 2012

Ask Silicon Chip

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 silicon@siliconchip.com.au

17 Jan, 2012

Vintage Radio

Boasting a power output of 50W RMS, the AWA PA1002 is a typical valve PA amplifier from the mid-1960s. It's a rugged, well-made unit with many useful features and is easy to troubleshoot and restore.

15 Jan, 2012

Dorji 433MHz Wireless Data Modules

Chinese 434MHz ISM data modules just keep getting better and better!

13 Jan, 2012

Circuit Notebook

Interesting circuit ideas which we have checked but not built and tested. Contributions will be paid for at standard rates. All submissions should include full name, address & phone number.

11 Jan, 2012

Build A Simple AM Radio

This simple AM radio can built in two forms. One is shirt pocket size, not much larger than an Android phone, which drives headphones or ear-buds. The other is a retro-style mantel radio with a hand-span dial and a 100mm (4-inch) loudspeaker in a basic timber cabinet.

9 Jan, 2012

Playing USB-Stick & SD/MMC Card Music Without A PC

Do you ever wish you could simply play music tracks that you've saved on a USB stick or memory card? We had a particular reason for developing this project but it could easily be incorporated into your home hifi system for real convenience!

7 Jan, 2012

Serviceman's Log

What do you make of a situation where several PCs in an office simultaneously fail for no apparent reason and then replacement machines also fail, along with other gear? It's just got to be a power supply problem but you?ll never guess what caused it.

5 Jan, 2012

A Stereo Audio Compressor

Do you hate the way the sound level on your TV suddenly jumps during the advert breaks? Or do you find that the sound levels vary widely when switching between digital TV stations? Or maybe you have problems listening to CDs or MP3s in your car or against the background din during a party? Are the soft parts too soft and the loud parts too loud? This Stereo Compressor will solve that problem. It reduces the dynamic range of the signal while still maintaining clean sound. The unit is also ideal for use with PA systems.

3 Jan, 2012

Arduino: What's All The Fuss About

The low-cost, open-source Arduino microcontroller development board has taken the hobby-electronics world by storm and is now gaining popularity with experienced engineers as well. So what?s all the fuss really about? And anyhow, what's with the name "Arduino" and where did it come from? Read on!

1 Jan, 2012

Publisher's Letter

Australia’s energy needs are in the hands of the clowns

Issue 279   View the articles in this issue >>
Ask Silicon Chip Steadicam: Taking The Bumps Out Of Movies, Pt. 2
The Square Kilometre Array Circuit Notebook

31 Dec, 2011

Ask Silicon Chip

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 silicon@siliconchip.com.au

30 Dec, 2011

Steadicam: Taking The Bumps Out Of Movies, Pt. 2

Seemingly unable to stop inventing more technology, Garrett Brown developed Steadicam® into more and more models. He then came up with radical ways of moving a camera above and across a sports field, down into a pool as a diver descends and tracking with swimmers as they move from one end of the pool to the other.

28 Dec, 2011

The Square Kilometre Array

Thousands of antennas... one radio telescope

26 Dec, 2011

Circuit Notebook

Interesting circuit ideas which we have checked but not built and tested. Contributions will be paid for at standard rates. All submissions should include full name, address & phone number.

23 Dec, 2011

How To Do Your Own Loudspeaker Measurements

It's cheap, easy, reliable and accurate...

21 Dec, 2011

MiniReg 1.3-22V Adjustable Regulator

This compact regulator PCB can be used to produce a fully regulated DC supply ranging from 1.3V to 22V at currents up to 1A. Depending on how much current you need, it can fit into tiny spaces and is easily connected with 2-pin headers for DC input, DC output, an on/off switch and a LED.

19 Dec, 2011

Serviceman's Log

Repairing a damaged home alarm system

15 Dec, 2011

The AlternatIVe Maximite World

The Maximite world is growing. As we mentioned last month in our miniMaximite story, the Maximite has been cloned a number of times, so now there is a range of alternatives for you to choose from. To help you in this choice we gathered a number of these to test along with some expansion boards that might help you connect the Maximite to the rest of the world.

13 Dec, 2011

Build A Magnetic Stirrer

Want CONSISTENTLY GREAT home-brew? Build this magnetic stirrer!

11 Dec, 2011

Ultra-LD Stereo Preamplifier & Input Selector, Pt.2

In Pt.2 this month, we describe the assembly of the Input Selector module and its companion Switch Board. We also show you how to make the IDC cables that link the modules together and give the remote control set-up and test procedure.

8 Dec, 2011

Vintage Radio

AWA R7077 Beat Frequency Oscillator

6 Dec, 2011

Digital Audio Delay For Perfect Lip Sync

Do you have a large plasma or LCD TV set and a home-theatre system? If so, you may have problems with sound and picture synchronisation (lip-sync). This Digital Audio Delay unit allows you to get the picture and audio perfectly matched. to choose from. To help you in this choice we gathered a number of these to test along with some expansion boards that might help you connect the Maximite to the rest of the world.

3 Dec, 2011

Mailbag

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".

1 Dec, 2011

Publisher's Letter

Issue 278   View the articles in this issue >>
Vintage Radio Mailbag
Ask Silicon Chip 2.2-100V Zener Diode Tester

27 Nov, 2011

Vintage Radio

The Astor P7G 8-Transistor AM Portable Radio

25 Nov, 2011

Mailbag

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".

23 Nov, 2011

Ask Silicon Chip

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 silicon@siliconchip.com.au

19 Nov, 2011

2.2-100V Zener Diode Tester

Got a bunch of unknown diodes and zener diodes? Check 'em all with this . . .

17 Nov, 2011

Tektronix MDO4104-3 Mixed Domain Oscilloscope

A digital scope with a spectrum analyser!

15 Nov, 2011

Ultra-LD Stereo Preamplifier & Input Selector, Pt.1

Designed for use with the Ultra-LD Mk.3 amplifier modules, this high-quality stereo preamplifier features a motorised volume control potentiometer. It is teamed with a 3-Input Selector board and both are controlled by the same infrared remote.

13 Nov, 2011

Circuit Notebook

Interesting circuit ideas which we have checked but not built and tested. Contributions will be paid for at standard rates. All submissions should include full name, address & phone number.

11 Nov, 2011

Serviceman's Log

Hiring a new technician is never easy

9 Nov, 2011

The MiniMaximite Computer

We now add to the Maximite family with the miniMaximite; a small, low-cost version designed for use as an intelligent controller to plug into your creation. It is fully software compatible with the original Maximite so you can develop and test your program on the larger version, then transfer it to the miniMaximite when you are ready to screw the covers down.

7 Nov, 2011

Build A G-Force Meter

Just what are the g forces involved in a balls-to-the-wall lap of Mt Panorama? This little beauty will tell you: instantaneous acceleration, braking, cornering; forwards, backwards, sideways... and it's battery operated and completely portable, so you can swap it from car to car!

5 Nov, 2011

Steadicam: Taking The Bumps Out Of Movies, Pt. 1

For more than 30 years Steadicam®, a system to stabilise the camera in film and video production has been a mainstay of the industry. But Garrett Brown, inventor of the device has not stood still. So, today there is Steadicam, son of Steadicam, son of son of Steadicam...

3 Nov, 2011

Power Your Pedal Pushie (or Building an eBike)

Riding a pushbike is great exercise - until you come to hills! Unless your name is Evans or Armstrong et al, unless you're one of the lycra brigade who keep super fit by pedaling everywhere and anywhere, even if your pushie has 150 gears and weighs about a hundred grams, you often wish that you could have just that little bit of assistance when the going gets tough!

1 Nov, 2011

Publisher's Letter

Mains surge suppressors are not a condition of electronic product warranties

Issue 277   View the articles in this issue >>
Mailbag Vintage Radio
High-Performance Stereo Headphone Amplifier, Pt.2 Ask Silicon Chip

27 Oct, 2011

Mailbag

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".

25 Oct, 2011

Vintage Radio

A look at the Radiola Model 573-MA Receiver

23 Oct, 2011

High-Performance Stereo Headphone Amplifier, Pt.2

Last month we introduced our new Hifi Headphone Amplifier which features very low distortion and noise. It can even drive efficient 8-ohm speakers. This month, we show you how to build and test it.

21 Oct, 2011

Ask Silicon Chip

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 silicon@siliconchip.com.au

19 Oct, 2011

The USB MIDI-Mate: A MIDI Interface for PCs

An up-to-date MIDI interface for PCs

17 Oct, 2011

Serviceman's Log

Unlike desktop PCs, laptops suffer from all sorts of accidental damage, sometimes fixable and sometimes not. Where possible though, we do like to repair them and keep them going.

15 Oct, 2011

Build A Loudspeaker Protector

Don't let this happen to you!

13 Oct, 2011

Review: CadSoft EAGLE PCB Layout Software

If you are new to PCB design or you are an old fogey stuck in a time warp with DOS and Protel Autotrax or Easytrax, now is your chance. Now you can get CadSoft EAGLE which works under the Windows, Linux or Mac operating systems. You can even get a limited version (EAGLE Light) which is available for non-profit use at no charge. You can then give DOS the flick.

11 Oct, 2011

Mailbag

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".

9 Oct, 2011

Digital LED Lighting Controller For Chrismas Lights

It's that time of year again when all those Christmas lighting devotees start planning and building their displays for the festive season. They might have dozens - if not hundreds - of different light arrays and they will be thinking about buying even more. Is this you? Have you thought about controlling lots of your lights in time to music? Well now you can!

7 Oct, 2011

Circuit Notebook

Interesting circuit ideas which we have checked but not built and tested. Contributions will be paid for at standard rates. All submissions should include full name, address & phone number.

5 Oct, 2011

Let's Get Quizzical: A Quiz Game With A Difference

No more boring old buzzers for us...

3 Oct, 2011

Measuring Audio Gear Without Spending Big Dollars

You can do it with your PC...

1 Oct, 2011

Publisher's Letter

Issue 276   View the articles in this issue >>
Vintage Radio Upgrading An Ultra-LD Mk.2 Amplifier To Mk.3 Standard
Ask Silicon Chip Ultra-LD Mk.3 200W Amplifier Module, Pt.3

28 Sep, 2011

Vintage Radio

Performance improvements for the Hotpoint Bandmaster J35DE console radio

26 Sep, 2011

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

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!

24 Sep, 2011

Ask Silicon Chip

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 silicon@siliconchip.com.au

22 Sep, 2011

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

Power supply & quiescent current adjustment

20 Sep, 2011

The Electronex Show Is Coming To Melbourne

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

18 Sep, 2011

Mailbag

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".

16 Sep, 2011

High-Performance Stereo Headphone Amplifier, Pt.1

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.

14 Sep, 2011

World Record 111-Gigapixel Photograph

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...

12 Sep, 2011

Circuit Notebook

Interesting circuit ideas which we have checked but not built and tested. Contributions will be paid for at standard rates. All submissions should include full name, address & phone number.

10 Sep, 2011

Improving The GPS-Based Frequency Reference

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.

8 Sep, 2011

Can You Really Reduce Your Electricitiy Bill

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!

6 Sep, 2011

Serviceman's Log

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.

4 Sep, 2011

Ultrasonic Water Tank Level Gauge

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!

2 Sep, 2011

LED Lighting Explained

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.

1 Sep, 2011

Publisher's Letter

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