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Contents
Vol.25, No.11; November 2012
SILICON
CHIP
www.siliconchip.com.au
Features
14 Sacrifice Your Sacrificial Anode
Replacing the sacrificial anode in your mains-pressure hot water tank can
greatly extend the tank life and save you lots of money. It’s straightforward
and cheap to do – by Leo Simpson
Sacrifice Your Sacrificial Anode
And Save Money – Page 14.
71 Review: Agilent U1233A DMM With Bluetooth Adaptor
This new DMM has a number of useful features including a Bluetooth adaptor
for data logging, non-contact voltage detection, the ability to measure true
RMS voltages and an inbuilt LED torch – by Nicholas Vinen
Pro jects To Build
18 High-Power Class-D Audio Amplifier, Pt.1
High-efficiency Class-D amplifier can deliver 150W into 8Ω, 250W into 4Ω and
up to 500W in bridged mode with low harmonic distortion – by John Clarke
30 High-Energy Ignition System For Cars, Pt.1
High-Power Class-D
Audio Amplifier, Pt.1 –
Page 18.
New design uses an IGBT ignition driver with inbuilt protection for less parts,
lower cost and greater reliability. Use it to replace a failed ignition module or to
upgrade a mechanical ignition system – by John Clarke
38 LED Musicolour: Light Up Your Music, Pt.2
Second article gives the assembly details and describes how the unit is
controlled using a software configuration file – by Nicholas Vinen
60 Hacking A Mini Wireless Web Server, Pt.1
Looking for a tiny, low-power web/email server with WiFi, Ethernet and USB
and which can be easily interfaced to other circuitry? Just follow some simple
steps to hack a $30 router – by Andrew Snow
66 A Seriously Bright 20W LED Floodlight
The 10W LED floodlight published last February was bright but this new 20W
unit is dazzling. Now that’s a floodlight – by Branko Justic & Ross Tester
Special Columns
High-Energy Ignition
System, Pt.1 – Page 30.
How To Hack A
Mini Wireless
Web Server,
Pt.1 – Page 60.
53 Serviceman’s Log
Un-bricking a Samsung Smartphone (never, ever give up)
74 Circuit Notebook
(1) Programmable RF Remote Timer/Switch; (2) Hard Drive Activity Indicator;
(3) GSM Alarm System Uses Hard Disk Drive As A Motion Sensor; (4) FixedFrequency PWM Motor Speed Control
84 Vintage Radio
The HMV A13B 4-Valve Twin-Chassis Mantel Radio
Departments
4
6
65
80
Publisher’s Letter
Mailbag
Order Form
Product Showcase
siliconchip.com.au
90 Ask Silicon Chip
95 Market Centre
96 Notes & Errata
Seriously Bright 20W LED
Floodlight – Page 66.
November 2012 1
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