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Issue 290   View the articles in this issue >>
Ask Silicon Chip Vintage Radio
A Seriously Bright 20W LED Floodlight Hacking A Mini Wireless Web Server Pt.1

25 Nov, 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

23 Nov, 2012

Vintage Radio

The HMV A13B 4-Valve Twin-Chassis Mantel

21 Nov, 2012

A Seriously Bright 20W LED Floodlight

Last February, we published a DIY 10W LED Floodlight, which has been enormously popular. We said that one was almost blinding - but to paraphrase Croc Dundee, that's not bright. THIS one is BRIGHT!

19 Nov, 2012

Hacking A Mini Wireless Web Server Pt.1

For about $30, you can have a tiny, low-power web/email server with WiFi, Ethernet and USB. And with a bit of extra circuitry, it can even monitor voltages and control some relays.

17 Nov, 2012

Review: Agilent U1233A DMM WIth Bluetooth Adaptor

This 6000-count true RMS multimeter has a built-in non-contact voltage detector, low impedance voltage measurement mode and the option of a Bluetooth communication module for wireless data logging.

15 Nov, 2012

Serviceman's Log

Un-bricking a Samsung smartphone

13 Nov, 2012

LED Musicolour: Light Up Your Music, Pt.2

The new LED Musicolour makes building a spectacular light and music show easier than ever. In this second and final instalment, we explain how to build and test the unit and also detail how you can control it.

11 Nov, 2012

High-Energy Electronic Ignition System For Cars, Pt.1

This new circuit improves upon our very popular high energy electronic ignition system. It uses an IGBT ignition driver rather than the expensive high-voltage Darlington used in our previous designs. You can use it to replace a failed ignition module or to upgrade a mechanical ignition system when restoring a vehicle.

9 Nov, 2012

Sacrifice Your Sacrificial Anode

WANT TO $AVE REAL DOLLAR$ IN THE FUTURE?

7 Nov, 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".

5 Nov, 2012

The CLASSiC-D, Part 1

World's first DIY high-power high-performance Class-D amplifier: 250Ω into 4Ω; 150W into 8Ω

3 Nov, 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.

1 Nov, 2012

Publisher's Letter

Issue 289   View the articles in this issue >>
Ask Silicon Chip Wireless Remote Control For The Barking Dog Blaster
Colour Maximite Microcomputer, Pt.2 Mailbag

27 Oct, 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

25 Oct, 2012

Wireless Remote Control For The Barking Dog Blaster

Don't waste time going to the start button; just instantly press the button on a hand-held remote to trigger the unit and shut the mutt up.

24 Oct, 2012

Colour Maximite Microcomputer, Pt.2

Building the unit and using its new sound & colour features

21 Oct, 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".

19 Oct, 2012

Vintage Radio

It's not common to see two sets that look almost identical on the outside but which are completely different on the inside. Such is the case with the Philips BX462A (Dutch) and 115 (Australian) receivers. In fact, the closer one looks at the chassis of these two sets, the more the differences become apparent.

17 Oct, 2012

Review: Micronix MSA438 3.3GHz Spectrum Analyser

This portable/hand-held instrument can run from mains or for up to four hours on an optional Lithium-ion battery. It has multiple measurement modes, USB flash drive support, PC connectivity (also USB) and an automatic signal finder mode. Its average noise level is -127dBm.

17 Oct, 2012

The Nick-Off Bad Cat Deterrent

Do you have a miscreant "puddy-tat" that likes to jump on kitchen benches (or worse)? It can be a real problem, especially at night when no-one is looking. The Nick-Off Cat Deterrent (aka the Ted-Off) is the perfect solution. It uses an infrared sensor to detect said cat and triggers an answering machine to play back simulated, demented barking. It also lights two white LEDs which form the eyes of an angry dog.

13 Oct, 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 Oct, 2012

Reverse Loop Controller For DCC Model Railways

Another project for DCC Model Railway enthusiasts...

10 Oct, 2012

HAARP: Researching The Ionosphere

If you believe the conspiracy theorists, HAARP is a "death ray", it can cause earthquakes, control weather, bring down aircraft . . . even cause buildings to disintegrate. But as we shall see, HAARP, the High Frequency Active Auroral Research Program facility in Alaska is a highly useful and promising research centre.

10 Oct, 2012

LED Musicolour: Light Up Your Music, Pt.1

Now you can have a kaleidoscope of colour which continually changes in time to music. This consists of 16 strings of LEDs which are individually controlled by 16 frequency bands. Louder signals in each of those bands means that the respective LED string will be brighter. Use it for a Christmas light show, a disco or just for fun when playing music.

5 Oct, 2012

Serviceman's Log

Ever had that sinking feeling when a hard disk drives fails and you haven't backed up critical data? Or have you accidentally deleted one or more important files? Retrieving your data depends on the nature of the problem and the experience of the person doing the recovery.

3 Oct, 2012

Electric Remotely Piloted Aircraft... With Wings

In August, we looked at the burgeoning field of multi-rotor RPAs and SGMAs. But long before multi-rotor aircraft had enough computer grunt to actually keep them in the air, conventional (ie, fixed-wing) electric-powered model aircraft were being flown by radio control.

1 Oct, 2012

Publisher's Letter

Issue 288   View the articles in this issue >>
Circuit Notebook The HRSA's 30th Birthday
Review: iModela 3-Axis CNC Router/Mill USB Test Instrument Interface For PCs

20 Sep, 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.

20 Sep, 2012

The HRSA's 30th Birthday

Australia's largest exhibition of Vintage Radios: It's on this month in Melbourne: 22-23 September at the Springvale Town Hall. We'll see you there!

19 Sep, 2012

Review: iModela 3-Axis CNC Router/Mill

Looking for a small computer-controlled router/mill? This one won't break the bank but has quite a wide range of uses, from cutting 3D objects out of soft materials through to engraving metal and making PCBs - not just the tracks but the holes as well.

19 Sep, 2012

USB Test Instrument Interface For PCs

With this USB interface you can turn your desktop or laptop PC into a whole suite of test instruments - a 2-channel digital scope, spectrum analyser, AC DMM and frequency counter plus a 2-channel audio signal/function/arbitrary waveform generator. Interested? Read on.

17 Sep, 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

16 Sep, 2012

Barking Dog Blaster: Shut That Annoying Mutt Up!

Driven mad by a barking dog? Don't get mad, get even. This unit operates above the range of human hearing and may help shut that mutt up

7 Sep, 2012

Review: Virtins Technology Multi-Instrument 3.2

PC based virtual instrument software

6 Sep, 2012

Colour Maximite Microcomputer, Pt.1

The original Maximite microcomputer (March-May 2011) has been a huge hit with readers and thousands are now in use all over the world, from Australia to Russia. So how do you improve on such a big hit? How about by adding eight vibrant colours and a stereo music synthesiser for a start? The result is stunning and it takes the Maximite to a whole new level.

5 Sep, 2012

Electronex: The Latest Smart Electronics

Electronex returns to Sydney's Australian Technology Park from 12-13th September and entry is free for SILICON CHIP readers

1 Sep, 2012

Publisher's Letter

Issue 287   View the articles in this issue >>
Ask Silicon Chip Isolated High-Current Adaptor For Scopes & DMMs
Serviceman's Log RPAs: Designing, Building & Using Them For Business

27 Aug, 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

22 Aug, 2012

Isolated High-Current Adaptor For Scopes & DMMs

If you want to measure and monitor mains current of up to 30A using your DMM or scope, this is the safe and easy solution. It works just as well with DC and it has significantly better resolution and bandwidth than most clamp meters.

19 Aug, 2012

Serviceman's Log

Watchmaking is not exactly my forte but I'll take on just about anything these days to try to make a dollar. Sometimes my efforts are successful and sometimes they aren't but it doesn't hurt to at least try.

18 Aug, 2012

RPAs: Designing, Building & Using Them For Business

SILICON CHIP talks to (while we watch in awe!) two young men who are dedicated RPA hobbyists turned businessmen: they are setting up a company specialising in aerial cinematography for movies and TV using RPAs - one of the first in Australia to do so.

16 Aug, 2012

Flying The Parrot AR Drone 2 Quadcopter

This impressive flying beast sports four rotors and two cameras. You can control it with an iPhone, iPad or Android device and capture 720p video of its exploits. It's quite robust, easy to fly and has multiple control modes to suit different pilot experience levels.

15 Aug, 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 Aug, 2012

Timer For Fans And Lights

This simple circuit provides a turn-off delay for a 230VAC light or a fan. It can be used to make a bathroom fan run for a set period after the switch has been turned off or it can be used with a pushbutton to turn a light on for a specific time. The timer circuit consumes no standby power when the load is off.

9 Aug, 2012

Multi-Rotor Helicopters

Remotely Piloted Aircraft (RPAs) are on the threshold of a major explosion in design, operation and areas of deployment. Leading the way in this revolution is a style of helicopter best known as a Quadcopter or Multi-rotor Copter.

8 Aug, 2012

The Driveway Sentry Mk.2

Here's an improved version of the Driveway Sentry we described in the November 2004 issue of SILICON CHIP. It detects vehicles like cars, trucks, tractors or other farm machinery moving along a driveway or through a gateway. When movement is detected, it switches on a mains-powered or battery-powered lighting system and activates an optional piezo buzzer alarm for a preset period ranging from 2-25 seconds.

5 Aug, 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".

3 Aug, 2012

We Drive Nissan's Leaf Electric Car

On June 15, the much-anticipated Nissan LEAF 100% electric vehicle went on sale in Australia. Not co-incidentally, this was also the day it was introduced to the media - including SILICON CHIP. We had a good look at the LEAF and took it for a reasonable (if all-too-short) drive. Were we a little impressed? No way! We were very impressed!

1 Aug, 2012

Publisher's Letter

Issue 286   View the articles in this issue >>
6-Decade Capacitance Substitution Box Vintage Radio
Ask Silicon Chip Modifying CD-ROM Motors For High Power Operation

29 Jul, 2012

6-Decade Capacitance Substitution Box

When breadboarding or prototyping, sometimes you need to experiment with a capacitor value. Substituting a range of different capacitors can be a bit tedious. What you need is a capacitance decade box, which makes it easy to find the right value for your circuit.

27 Jul, 2012

Vintage Radio

Built in Australia more than 50 years ago, this AWA 157P 7-transistor radio is still in good condition and required only a few minor repairs to restore it to working order. It's built like a valve receiver, with point-to-point wiring and no printed circuit board.

25 Jul, 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

21 Jul, 2012

Modifying CD-ROM Motors For High Power Operation

Did you know that you can convert the flea-power motors from old CD or DVD-ROM drives to high-power operation - eg, for model aircraft or other demanding uses? While it may seem improbable it is relatively easy to do, the main change being to fit Neodymium 'Rare Earth' magnets. Oh, you also need to find some suitable motors.

19 Jul, 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.

17 Jul, 2012

10A DCC Booster For Model Railways

Most DCC base stations have puny current capabilities which are exposed if you want to run more than a few locos and peripherals on your model railway layout. Problem is, DCC boosters are expensive, with a well-known 5A booster costing over $200. Problem no longer; build this 10A beauty at a fraction of the cost.

15 Jul, 2012

The Freetronics "Leostick" USB-Capable Microcontroller

A powerful 8-bit USB-capable microcontroller board the size of a flash drive! And our publisher was so chuffed that they'd name a board after him...

13 Jul, 2012

Wideband Oxygen Sensor Controller Mk.2, Pt.2

Last month, we introduced our new Wideband Oxygen Sensor Controller Mk.2 and described the circuit. This month, we give the circuit for the display unit and the full construction details.

11 Jul, 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".

9 Jul, 2012

The Square Kilometre Array: Australian Misses Out

Most readers will have heard of the Square Kilometre Array (SKA) radio telescope project which SILICON CHIP reported on in the December 2011 issue. It was supposed to be a bidding contest between Australia and South Africa. In simple terms, South Africa won and we lost. But that's not the end of the story.

7 Jul, 2012

Serviceman's Log

Many homes have had solar panels installed over the last few years, usually ranging from about 1.5kW up to 4kW. But how safe are they, especially if they have been installed in a rush to meet subsidy deadlines?

5 Jul, 2012

Soft Starter For Power Tools

Stop that dangerous kick-back...

4 Jul, 2012

Peter Olsen & His Flashing School Lights

If you're in NSW, you may have seen those "check speed" signs with flashing lights mounted near the large "school zone" signs which mark the areas around schools where children will be present before and after school. They're the result of a lot of political pressure - and heartache - by Peter Olsen over the past six years. Of particular interest to SILICON CHIP, they're powered by PICAXE microcontrollers.

1 Jul, 2012

Publisher's Letter

1 Jan, 1970

Notes & Errata

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