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Contents
SILICON
CHIP
www.siliconchip.com.au
Vol.26, No.1; January 2013
Features
14 The Bright Present & Brighter Future Of LED Lighting
LEDs are fast becoming the devices of choice for artificial lighting. Here’s a
look at the latest in LED technology – by Dr Faiz Rahman
20 The Sydney HiFi Show
Big speakers, bigger amplifiers and fancy video projectors; they were just
some of the products at this year’s Australian Audio & AV Show recently held
in Sydney – by Allan Linton-Smith
62 Review: Marantz NA7004 Network Audio Player
It may have a prosaic name but this Marantz hifi tuner is one of the few units
that will provide the best audio reproduction from such diverse sources as
DAB+, AM, FM, USB, iPod and the internet. It will also function as a high
quality DAC and can handle Toslink and coax digital signals – by Leo Simpson
Marantz NA7004 Network Audio
Player Review – Page 62.
Champion Preamp &
Audio Amplifier Module
– Page 24.
Pro jects To Build
24 The Champion Preamp/Audio Amplifier Module
It’s based on an AN7511 bridge output amplifier IC, can deliver up to 7W peak
power and features an optional preamp circuit – by Nicholas Vinen
36 Build A Solar-Powered Skylight
Don’t pay a lot of money for a skylight to be installed. Use a solar panel and a
few ultrabright LEDs instead to achieve effectively the same thing but for less
dollars – by Ross Tester
54 Garbage & Recycling Reminder
Need reminding when to put the bins out? Can’t remember whether it’s a
recycling week or a greens week? This easy-to-build project flashes coloured
LEDs on the due day to indicate which bins should go out – by John Clarke
68 A 2.5GHz 12-Digit Frequency Counter, Pt.2
Second article this month describes the assembly and details the simple setting
up procedure – by Jim Rowe
80 Performance Tweak For The Ultra-LD Mk.3 Amplifier
Isn’t the Ultra-LD Mk.3 amplifier module supposed to be perfect? Well, there’s
always the next step. Here’s a simple modification to improve its performance
when it is grossly overloaded – by Leo Simpson
Garbage & Recycling
Reminder – Page 54.
Special Columns
32 Circuit Notebook
(1) Full Duplex Intercom Using Telephones With Tone Dialling; (2) Simple
Variable Dynamic Load For Testing Power Supplies; (3) Simple LED Switch
Has Timeout Function; (4) 400Hz 115VAC Sinewave Supply
40 Serviceman’s Log
Tracking Biggles the cat with a mini-GPS
86 Vintage Radio
The National SW5 battery-powered “Thrill Box” shortwave receiver
Departments
2 Publisher’s Letter
4 Mailbag
siliconchip.com.au
53 Subscriptions
78 Product Showcase
85
91
95
96
Order Form
Ask Silicon Chip
Market Centre
Notes & Errata
Building The 2.5GHz 12-Digit
Frequency Counter – Page 68.
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