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Contents
Vol.29, No.4; April 2016
SILICON
CHIP
www.siliconchip.com.au
Features
18 Gravitational Waves: Einstein Was Right . . . Again
Scientists have now finally proven the last, elusive bit of Einstein’s General
Theory of Relativity, by observing gravitational waves arriving at the Earth
from a cataclysmic event in the distant past. But what are gravitational waves
and why are they relevant? – by Ross Tester
60 Review: Keysight U1282A & U1242C Multimeters
The new U1282A true RMS DMM from Keysight features IP67 dust/water
ingress protection, 3-metre drop resistance, a 60,000-count display and a
basic DC voltage accuracy of 0.025%. The U1242C is a lower-cost option
with similar features, including IP67 protection – by Nicholas Vinen
Touch-Screen Boat Computer
With GPS – Page 22.
80 Digital TV & MPEG-4: The Current State Of Play
The recent decision by the Nine Network to simulcast in MPEG-4 has caused
problems for many TV viewers. That’s because TV sets were not required to be
MPEG-4 compatible. So what’s next? – by Alan Hughes
Pro jects To Build
22 Touch-Screen Boat Computer With GPS
Would you like an accurate digital speedometer for your boat? This low-cost unit
is just the shot. It can also display a raft of other information, including heading,
location and the relative bearing to a point of interest, which can be anything
from the harbour entrance to a great fishing spot – by Geoff Graham
34 Microwave Leakage Detector
Your microwave oven might still look good but that doesn’t mean it’s safe. It
could be leaking lots of microwave energy, potentially putting you at risk of being
zapped. Now you can easily test it with our tiny Microwave Leakage Tester. As a
bonus, it will also test WiFi access point activity – by Nicholas Vinen
Microwave Oven Leakage
Detector – Page 34.
40 Fridge/Freezer Alarm
Who left that <at>#$% door open again? Well, we’ve all done it; opened the fridge/
freezer door and then not closed it properly. This simple device will save your
food and stop you wasting expensive electricity – by John Clarke
62 Arduino Multifunction 24-Bit Measuring Shield
This low-cost PC-linked instrument provides four accurate DC voltage measurement ranges plus an audio frequency level and power meter and an optional RF
level and power meter which can operate to 500MHz – by Jim Rowe
Fridge/Freezer Alarm
– Page 40.
Special Columns
54 Serviceman’s Log
Odyssey Stratos amplifier voltage conversion – by Nicholas Vinen
72 Circuit Notebook
(1) Mobile Phone Ring Extender With Pager; (2) USB Power Injector;
(3) Third Hand For Soldering Tiny Surface Mount Devices; (4) 4-Digit
Code Lock Uses Atmel Micro
86 Vintage Radio
The Westinghouse H-618 6-transistor radio – by Ian Batty
Departments
4 Publisher’s Letter
6
Mailbag
siliconchip.com.au
53 Product Showcase
85 SC Online Shop
91
95
96
96
Ask Silicon Chip
Market Centre
Advertising Index
Notes & Errata
Arduino Multifunction 24-Bit
Measuring Shield – Page 62.
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