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Contents
SILICON
CHIP
www.siliconchip.com.au
Vol.24, No.6; June 2011
Fea tures
14 The FutureWave Energy Saver
At last: here’ s an energy saver that actually does save energy! It’s specifically
intended for use with certain electric motors, especially as used in swimming
pool and spa pumps – by Ross Tester
22 Rescuing Electronic Gear After The Flood
The devastating Queensland floods wiped out a lot of electronic gear. Here’s
how some high-end radio gear was rescued and restored – by Robert Googe
74 HiFi Review: Marantz CD6003 CD Player
DVD players can give good results when playing audio CDs but a dedicated
CD player is still the best way to go. This high-quality CD player from Marantz
features pitch control, a USB input and lots of other goodies – by Leo Simpson
20A 12/24V DC Motor Speed
Controller Mk.2 – Page 28.
Projects To Build
28 20A 12/24V DC Motor Speed Controller Mk.2
This gutsy little motor speed controller is easy to build and features low-battery
protection, soft start and adjustable pulse frequency. It can run from 12V or
24V batteries at currents up to 20A – by John Clarke
36 USB Stereo Recording & Playback Interface
Want to use your laptop or PC to record high-quality stereo audio? This USB
interface unit features balanced mic inputs, stereo analog line inputs & outputs,
an S/PDIF digital audio input and an S/PDIF output – by Jim Rowe
62 VersaTimer/Switch With Self-Latching Relay
Do you have a switching application (up to 230VAC) that calls for a relay but
needs very low current drain? Here’s a micropower switch that also functions
as a programmable timer and/or 12V battery protector – by John Clarke
USB Stereo Recording &
Playback Interface – Page 36.
80 A Handy USB Breakout Box For Project Development
It connects between two USB cables and lets you examine the D+ and Dsignal line activity with your scope and the current flow – by Jim Rowe
Special Columns
57 Serviceman’s Log
There’s just no pleasing some people – by the Serviceman
83 Circuit Notebook
(1) Wireless Doorbell Relay Driver; (2) Microphone Adaptor For A Violin; (3)
Diesel Engine Watchdog Circuit Monitors Oil Pressure & Water Temperature;
(4) PICAXE-Based Metronome With Accented Beat; (5) Multi-Decade PeriodMultiplier For Precision Frequency Comparisons
90 Vintage Radio
VersaTimer Switch With SelfLatching Relay – Page 62.
62.
Radio manufacturing in 1925: the Wells Gardner story – by Kevin Poulter
Departments
2
4
88
95
Publisher’s Letter
Mailbag
Product Showcase
Order Form
siliconchip.com.au
98 Ask Silicon Chip
102 Notes & Errata
103 Market Centre
A Handy USB
Breakout Box – Page 80.
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June
2011 1
2011 1
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