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Issue 220   View the articles in this issue >>
Review Yokogawa DL9000 Series Digital Scopes Biolock: Using fingerprints To Unlock Doors
The Boony and Beefy Figurines A Remote Telltale for Garage Doors

31 Jan, 2007

Review Yokogawa DL9000 Series Digital Scopes

Yokogawa's 10th generation digital oscilloscopes offer GHz bandwidth for less money than the competition - and they won't hog your desktop, either!

30 Jan, 2007

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 silchip@siliconchip.com.au

28 Jan, 2007

Biolock: Using fingerprints To Unlock Doors

No keys, no cards, no pins...but it's very secure!

24 Jan, 2007

A Remote Telltale for Garage Doors

If you have a perfect memory you won't need this. But the rest of us could find it very handy! It lets you know if you've left the garage door open without stumbling out in the dark or the pouring rain...

23 Jan, 2007

WiNRADiO: Marrying A Radio Receiver To A PC

Australia has gone from a leading manufacturer of radios and components to almost exclusively importing electronics - usually displaying the 'made in China' label. With an upsurge of new technology like MP3, GPS, Bluetooth and much more, it's a revelation to find an Australian company designs and manufacturers high-tech world-leading innovative radios, making an impact worldwide.

21 Jan, 2007

Mailbag

20 Jan, 2007

Intelligent 12V Charger for SLA & Lead Acid Batteries

Here's a cheap and simple battery charger which you can leave connected without risk of overcharge.

20 Jan, 2007

Serviceman's Log

It's no wonder I get aggravated

19 Jan, 2007

Publisher's Letter

Today's hospitals are full of electronics

16 Jan, 2007

Vintage Radio

Now considered to be relics of a bygone era, stereo radiograms (or stereograms) were common during the 1960s. The Philips RF5 stereogram was typical of this new breed of entertainment systems.

14 Jan, 2007

Salvage It!

Old tape-based answering machines can now be picked up for next to nothing or perhaps you've got one stashed away in the cupboard. Here are few ideas to put it to use.

12 Jan, 2007

Circuit NoteBook

Interesting circuit ideas which we have checked but not built and tested. Contributions from readers are welcome

8 Jan, 2007

Intelligent Car Air-Conditioner Controller

It stops your car's air condiotioner from sapping engine power when going up hills or during over taking. It could even save on fuel costs.

5 Jan, 2007

"Degen" Synthesised HF Communications Receiver

Elsewhere in this issue we feature "WinRadio": a very high performance, computer-based radio receiver. As that review was being written, this tiny communications receiver also arrived at SILICON CHIP. It's very significantly cheaper, covers the complete 100kHz to 30MHz MF/HF band (with 88-108MHz broadcast band into the bargain) and offers a wide range of user controls. We thought it apposite to put this review in the same issue so readers can get make their own comparisons...

Issue 219   View the articles in this issue >>
Super Speedo Corrector Mailbag
Cordless Power Tool Charger Controller The Holden Lightship & Its 2321cm Video Screen

27 Dec, 2006

Super Speedo Corrector

Get your electronic speedo reading accurately

26 Dec, 2006

Mailbag

23 Dec, 2006

Cordless Power Tool Charger Controller

Protect your investment and extend the life of your power tool rechargable batteries. Add this power tool charge controller and never cook a nicad again!

21 Dec, 2006

The Holden Lightship & Its 2321cm Video Screen

TV takes to ... The Holden AirShip

21 Dec, 2006

Bringing a dead cordless drill back to life

Do you have cordless drills or other battery-powered tools lying unloved and unused because their batteries have failed? Don't do the usual and buy another one because they're so cheap: think of the planet and resurrect the ones you have! And then build our new power tool charger to really care for your batteries!

20 Dec, 2006

A Heartbeat CPR Training Beeper

During mid-2006, Australian emergency health care providers and first aid bodies largely fell into line with the Australian Resuscitation Council guidelines for the delivery method and timing of cardio-pulmonary resuscitation - or CPR. Here's a low-cost trainer which provides audible beats to get the timing right.

19 Dec, 2006

Vintage Radio

Developed during the 1960s, hybrid car radios combined a valve front-end with an audio output stage based on germanium transistors. They quickly replaced valve-based designs with vibrator power supplies but were themselves made obsolete within a few years.

18 Dec, 2006

Salvage It!

You've got to be extremely careful with microwave ovens - even a "dead" one can kill you! Here's how to render it safe and salvage some very useful parts.

16 Dec, 2006

PICAXE Netserver - Pt.4

Last month, we showed you how to use the PICAXE Net Server (PNS) to control a motor and monitor a switch in a pet feeder via the Internet. As promised, this month we look at a more sophisticated monitoring system.

15 Dec, 2006

Serviceman's Log

Imagine watching a TV set that's now 50 years old - one that was made long before the introduction of colour TV in Australia! Of course, this particular set has had a few repairs during those 50 years.

14 Dec, 2006

Publisher's Letter

Cheap battery drills are very wasteful

13 Dec, 2006

Build A Radar Speed Gun, Pt.2

Last month, we unveiled our new low-cost microwave Doppler Radar Speed Gun, designed for measuring the speed of cars, bikes, boats, horses and even human sprinters. This month, we show you how to build it and describe how it is used.

12 Dec, 2006

Circuit NoteBook

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.

7 Dec, 2006

12/24V AuxiliaryBattery Controller

Going bush in the 4WD or camper? Want to add a second battery for security and safety? Here's the safe way to do it.

6 Dec, 2006

What's Happened To Electronic Advances In Cars

Car manufacturers seem to have lost the plot. Instead of cramming new cars with useless electronic gadgets, they should be using electronic technology to improve efficiency and reduce fuel consumption.

5 Dec, 2006

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 silchip@siliconchip.com.au

Issue 218   View the articles in this issue >>
Build Your Own Compact Bass Reflex Loudspeakers Vintage Radio
LED Tachometer With Dual Displays, Pt.2 Publisher's Letter

30 Nov, 2006

Build Your Own Compact Bass Reflex Loudspeakers

Would you like to build some high quality speakers and don't mind doing some enclosure assembly finishing? These M6 compact bass reflex systems from theloudspeakerkit.com could be just what you are looking for. Use them on stands or on a bookshelf.

30 Nov, 2006

Vintage Radio

The "portable" radio equipment used by the military at the start of World War 2 was bulky, heavy and inefficient by today's standards. Here we take a look at Radio Corporation's WS108 transceiver, as used by the Australian army.

29 Nov, 2006

LED Tachometer With Dual Displays, Pt.2

Setting up the LED Tacho mainly involves stepping through and reprogramming the default software settings in the PIC to suit your vehicle. Here's how it's done.

29 Nov, 2006

Publisher's Letter

Do people really want a high-performance valve amplifier?

26 Nov, 2006

Review: Bitscope BS310 Mixed Signal Oscilloscope

This versatile data acquisition system packs a digital oscilloscope, spectrum analyser, logic analyser, data recorder and waveform generator into one affordable package - and it's Australian-designed and supported!

24 Nov, 2006

Review: JVC KD-AVX2 Car Entertainment System

Revolutionise your in-car music

22 Nov, 2006

Review: Sony Alpha A100 Digital SLR Camera

As production of film cameras continues to shrink, it comes as no surprise to see the electronic 'majors', such as Sony and Panasonic, grasp an opportunity to feed the swelling demand for digital single lens reflexes, known to the in-crowd as DSLRs. Barrie Smith reports his experience with the Sony Alpha A100 camera.

21 Nov, 2006

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 silchip@siliconchip.com.au

20 Nov, 2006

Circuit Notebook

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.

19 Nov, 2006

PICAXE Net Server, Pt.3

Over the last couple of months, we described how to built a demo board for the PICAXE Net Server (PNS) and then configured a home network to make it accessible over the Internet. This month, we look at building the first of two Internet-enabled demonstration projects.

18 Nov, 2006

DC Relay Switch For High-Current Loads

Want to switch power to a high-current load using a circuit capable of supplying just a few milliamps? No problem - build and use the SILICON CHIP DC Relay Switch.

16 Nov, 2006

Programmable Christmas Star

Star of wonder, star of night! Star of royal beauty bright; westward leading, still proceeding, guide us to thy Perfect Light.

15 Nov, 2006

Serviceman's Log

It's amazing how some people become attached to a particular piece of equipment that they've owned for some years. If it breaks down, then it just has to be fixed but who am I to complain?

14 Nov, 2006

Mailbag

13 Nov, 2006

Build Your Own Radar Speed Gun, Pt.1

If you're into any kind of racing - like cars, bikes, boats or even horses - this project is for you. It's a microwave Doppler speed radar system, similar to the expensive gear used by traffic police, only much cheaper. It can read directly in km/h or mph for speeds up to 250km/h+.

12 Nov, 2006

Salvage It!

Good quality convex lenses can be salvaged for next to nothing from car wrecking yards. Here's how to use them to make a really bright handheld spotlight or a broad-beam bike light.

Issue 217   View the articles in this issue >>
Infrared Remote Extender for IR remote controlled equipment Circuit Notebook
A 12V Digital Timer using a 240v Timer Module Review: The CarChip E/X

23 Oct, 2006

Infrared Remote Extender for IR remote controlled equipment

This simple device lets you operate your CD/DVD player, set-top box (even the newest ones!), VCR or other program source using its remote control from another room in the house. It receives the signal from the remote control and relays this to the other room via a 2-wire cable. An infrared LED then retransmits the signal to your remote controlled equipment.

21 Oct, 2006

Circuit Notebook

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.

19 Oct, 2006

A 12V Digital Timer using a 240v Timer Module

240V timers are very cheap these days. 12V timers are not so cheap. So why not use the "innards" out of a 240V timer and make a very flexible 12V timer?

17 Oct, 2006

Review: The CarChip E/X

This Brilliant little device plugs straight into your car's On-Board Diagnostics (OBD) port and logs all sorts of data

15 Oct, 2006

PICAXE Net Server - Pt.2

Accessing the PICAXE Net Server via the internet

14 Oct, 2006

UHF Prescaler For Frequency Counters

Here's a high speed prescaler which can extend the range of virtually any frequency counter to over 2.8GHz. It divides frequencies by exactly 1000, so gigahertz can be read directly in megahertz.

13 Oct, 2006

Review: Merlin Broadcast Quality Audio Mixer

A broadcast-quality unit designed for schools, colleges, training and even community radio stations

12 Oct, 2006

Salvage it

The traditional bicycle alternator or "dynamo" is not very effective. Here's how to turn a salvaged stepper motor into a high-power alternator for really effective lighting, even at low speed.

11 Oct, 2006

LED Tachometer With Dual Displays, Pt.1

A responsive and accurate tachometer is essential for motoring enthusiasts. This new unit features a bright 4-digit display plus a 32-LED circular bargraph. The LED bargraph responds rapidly to changes in RPM while the digital display shows accurate RPM readings with a steady throttle.

9 Oct, 2006

Serviceman's Log

When is a bargain not a bargain? When it causes you grief, that's when. Unfortunately, I sometimes just cannot resist the temptation to buy stuff - even when it isn't working.

7 Oct, 2006

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 silchip@siliconchip.com.au

5 Oct, 2006

Thomas Alva Edison - Genius, Pt.2

This month marks the 75th anniversary of Edison's death. While his genius was recognised during his lifetime, it's only since his passing that the magnitude of that genius started to become appreciated.

3 Oct, 2006

Mailbag

1 Oct, 2006

Publisher's Letter

Science teachers should stick to the truth

Issue 216   View the articles in this issue >>
PICAXE Net Server - Pt.1 S-video to composite video converter
Turn an old XBox into a $200 Multimedia Player Galactic Voice

30 Sep, 2006

PICAXE Net Server - Pt.1

Control your next electronics project from virtually anywhere on the planet using the Internet and a tiny web server - the PICAXE Net Server!

30 Sep, 2006

S-video to composite video converter

Some digital TV set-top boxes provide only S-video and component video outputs, which can pose a problem if your TV set only has a composite video input - or you've used up the S-video and component video inputs. The same can happen with video tuner cards for PCs. Here's an easy-to-build adapter to get you out of trouble.

19 Sep, 2006

Galactic Voice

Build this "voice bender" for instant rapport with all those aliens your likely to meet in the far reaches of the universe.

17 Sep, 2006

'Wachit' - it turns a VCR into a Security Recorder

Connet this video motion detector between a camera and a VCR for all sorts of security and monitoring applications

15 Sep, 2006

Salvage It

The Good Bits In Old Receivers

13 Sep, 2006

Serviceman's Log

Warranty: true lies & confessions

11 Sep, 2006

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 silchip@siliconchip.com.au

8 Sep, 2006

LP's TO CD's

Want to transfer your old LP's or 78 records to CD or MP3 format? Here's how to go about it and get rid of surface noise in the process.

7 Sep, 2006

Publisher's Letter

Australia's energy policies should rely heavily on natural gas

6 Sep, 2006

Thomas Alva Edison - Genius

The fascinating story of an inventive genius

3 Sep, 2006

Vintage Radio

The Admiral 5BW mantel receiver

1 Sep, 2006

Aquarium Temperature Alarm

Don't let your tropical fish freeze or fry to death. This programmable circuit warns of out-of-range temperature conditions

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