JULY 1989
FEATURES
6 A Day in the Life of A Computer by Ross Phillips
ARE YOU WORRIED about
exhaust gases seeping into your
car with possible tragic
consequences. If so, you need
out Exhaust Monitor. Details
page 14.
A visit to the IPC factory in Singapore
10 The Facts On the PhaxSwitch by Leo Simpson
The end of your fax machine hassles
82 The Evolution of Electric Railways by Bryan Maher
Pt.21: the NSW 86 class electrics
PROJECTS TO BUILD
14 Exhaust Gas Monitor For Cars & Vans by Bob Flynn
Alerts you to carbon monoxide build-up
32 Extension For the Touch-Lamp Dimmer by Leo Simpson
Let's you dim the lights from several positions
42 Experimental Mains Hum Sniffers by Steve Payor
Build them from junkbox parts
DIM YOUR LIGHTS from more
than one position by adding this
extension circuit to the TouchLamp Dimmer described last
month. Construction starts on
page 32.
58 Compact Ultrasonic Car Burglar Alarm by Greg Swain
It's easy to build & easy to fit
SPECIAL COLUMNS
28 Vintage Radio by John Hill
Old Henry: one of my favorites
52 Serviceman's Log by the TV serviceman
You need a pal to deal with PAL
66 Amateur Radio by Garry Cratt
Build this intelligent charger for 12V gel batteries
THIS COMPACT ultrasonic car
burglar alarm is based on a
proven commercial unit. It's
easy to build and easy to install.
See page 58.
70 Computer Bits by Jennifer Bonnitcha
A look at video monitors
78 The Way I See It by Neville Williams
Police radar: where it works & where it doesn't
DEPARTMENTS
2 Publisher's Letter
4 Mailbag
22 Circuit Notebook
47 Bookshelf
87 Subscription Page
88
92
95
96
Product Showcase
Ask Silicon Chip
Back Issues
Market Centre
GET THE MOST out of your
12V gel batteries by building
this intelligent charger. It's
based on a single IC that
constantly monitors the output
voltage and charging current.
Turn io page 66.
]ULY 1989
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