Contents
Vol.22, No.4; April 2009
www.siliconchip.com.au
SILICON
CHIP
Features
11 Digital Radio Is Coming, Pt.3
This month, we look at how program and data information is multiplexed within
the transmission – by Alan Hughes
14 Wireless Networking With Ubuntu & Puppy Linux
Wireless networking in Linux is easy. Here’s how to do it for Ubuntu and
Puppy Linux. We also tell you how to lock down a wireless network, to stop
freeloaders from stealing your bandwidth – by Greg Swain
Wireless Networking In Ubuntu
& Puppy Linux– Page 14.
76 Review: Tektronix MSO2024 Mixed Signal Oscilloscope
It’s suitable for a wide range of applications & features four analog and 16
digital inputs, a 1Gs/s sampling rate & a 200MHz bandwidth – by Mauro Grassi
85 Half-Duplex With HopeRF’s HM-TR UHF Transceivers
Using a PICAXE to drive HopeRF’s HM-TR 433MHz programmable data
transceivers works really well – by Stan Swan
Pro jects To Build
22 Multi-Function Remote-Controlled Lamp Dimmer
Multi-Function RemoteControlled Dimmer – Page 22.
A dimmer is just a dimmer, right? This little beauty will change your mind. It
has five modes of operation and can be controlled using virtually any universal
remote – by Mauro Grassi
36 School Zone Speed Alert
Protect your driver’s licence and your wallet with this project. It flashes a
warning LED during the 40km/h school speed zone times – by Jim Rowe
42 USB Printer Share Switch
Easy-to-build project lets you switch a USB printer or some other USB device
between two PCs – by Jim Rowe & Greg Swain
School Zone
Speed Alert – Page 36.
58 Build A Microcurrent DMM Adaptor
Your digital multimeter can not make accurate current measurements in lowvoltage circuits. This low-cost precision current adaptor solves that problem –
by David L. Jones
Special Columns
53 Serviceman’s Log
Is it worth fixing an older plasma set? – by the Serviceman
66 Circuit Notebook
(1) Automated Water Tank Filler; (2) Modified Flexitimer; (3) RS232C To
Current Loop Converter; (4) Simple Counter Uses A Crystal Clock As A
Readout; (5) High-Side Current Monitor; (6) Electronic Kaleidoscope
80 Vintage Radio
The Airzone 520/550 5-valve mantel receiver – by Rodney Champness
USB Printer Share
Switch – Page 42.
Build A
Microcurrent
DMM Adaptor
– Page 58.
Departments
2 Publisher’s Letter
4 Mailbag
30 Order Form
siliconchip.com.au
88 Ask Silicon Chip
91 Notes & Errata
94 Market Centre
April
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