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Contents
Vol.16, No.6; June 2003
www.siliconchip.com.au
FEATURES
8 A Look At The 2003 Mars Rovers
The technology built into the latest Mars Rovers is out of this world. They
should be on the Martian surface by early 2004– by Sammy Isreb
78 Satellite TV Reception: A Postscript
Aurora free-to-air TV: it’s not open slather – by Garry Cratt & Ross Tester
PROJECTS TO BUILD
13 The PICAXE, Pt.5: A Chookhouse Door Controller
There’s nothing “eggsotic” about this project; it simply uses a PICAXE-08 to
automatically operate a chookhouse door – by Stan Swan
18 PICAXE-Controlled Telephone Intercom
Simple PICAXE-based circuit lets you link two telephones together for use as
an intercom – by David Lincoln
Chookhouse
Door Controller
– Page 13.
22 PICAXE-08 Port Expansion
Want to add more input and/or output ports to a PICAXE-08? Here’s some
simple circuitry and some software to do the job – by David Lincoln
34 Sunset Switch For Security & Garden Lighting
Want to switch an appliance on automatically at dusk and off again after a
few hours? This Sunset Switch will do it for you – by John Clarke
56 Test Your Reflexes With A Digital Reaction Timer
So you think your reaction time is pretty good, eh? Build this reaction timer
and find out if you’re as good as you think you are – by Jim Rowe
68 Adjustable DC-DC Converter For Cars
Simple circuit can be set to deliver any output voltage from 13.8-24V at up
to 2A. And it can charge 12V 6.5Ah SLA batteries – by John Clarke
Sunset Switch For Security &
Garden Lighting – Page 34.
74 Long-Range 4-Channel UHF Remote Control
Matchbox size units feature long range (over 1km), four separate channels
and simple construction – by Greg Swain
SPECIAL COLUMNS
30 Circuit Notebook
(1) Computer Data Cable Tester; (2) Inductive Speed Sensor For Cars;
(3) Digital Thermometer With LCD Readout; (4) Low Battery Indicator;
(5) 555 Timer Circuit With Variable On/Off Times; (6) High-Current Battery
Discharger; (7) High-Current Low-Dropout Regulator
Adjustable DC-DC Converter For
Cars – Page 68.
40 Serviceman’s Log
Time really is money – by the TV Serviceman
80 Vintage Radio
Building A Browning-Drake Replica – by Rodney Champness
DEPARTMENTS
2
4
53
85
Publisher’s Letter
Mailbag
Product Showcase
Silicon Chip Weblink
www.siliconchip.com.au
88
90
93
95
Ask Silicon Chip
Notes & Errata
Market Centre
Advertising Index
LongRange
4-Channel UHF
Remote
Control –
Page 74.
June 2003 1
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