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Contents
Vol.33, No.8 August 2020
SILICON
CHIP
www.siliconchip.com.au
Features & Reviews
10 Measuring distance & motion with lidar and SODAR
While radar has been a staple for use in detecting stationary or moving objects
over large distances, sometimes precise measurements need to be made over
much smaller ranges. This is where light (lidar) and sound (SODAR) are much
more useful – by Dr David Maddison
31 Microchip’s new Hello FPGA kit
The Hello FPGA (Field Programmable Gate Array) is an evaluation kit from
Microchip intended to be a gentle introduction to FPGAs. It costs approximately
$250 and includes a 480 x 320 LCD display (similar to the one in our Micromite
BackPack V3), colour camera, 8GB of RAM and more – by Tim Blythman
Lidar can be used to make detailed
3D maps or track moving objects,
while SODAR is mainly used to
remotely monitor the movement of
water or air – Page 10
Constructional Projects
24 SuperCodec: the ultimate in computer sound cards
With performance so good our Audio Precision test gear has difficulty measuring
it, we believe the USB SuperCodec is better than nearly everything on the
market. If you’re serious about your computer audio, you’ll want to build this one!
- by Phil Prosser
38 A homemade Switchmode 78XX replacement
Here’s an efficient drop-in replacement to the well-used 78XX series of regulators
that you can easily build yourself for a variety of voltages – by Tim Blythman
This USB SuperCodec
is a must-have multi-function
audio device, with high-fidelity audio
recording and playback – Page 24
66 1MHz-6GHz Arduino-based Digital RF Power Meter
This RF power meter uses an Arduino Nano and measures from 1MHz-6GHz at
power levels up to 3mW (5dBm), and its range can be easily extended by using
low-cost fixed attentuators – by Jim Rowe
88 The Colour Maximite 2 – part two
The final part of this series covers assembly, setup and writing your own BASIC
programs with this miniature computer – by Geoff Graham and Peter Mather
Your Favourite Columns
46 Serviceman’s Log
Fixing heaters – it’s a gas – by Dave Thompson
These DIY switchmode regulators
can replace 78XX linear regulators
with better efficiency (no heatsink
required!), and can be built for 3.3V
all the way to 24V – Page 38
61 Circuit Notebook
(1)
(2)
(3)
(4)
(5)
Four USB power supplies from a laptop charger
Preamplifier power supply runs from 5V DC
Modifying the Ultra-LD Mk.2 to drive a hearing loop
Altitude readout for the Boat Computer
Heelometer for boats
83 Vintage Radio
Velco 1937 ‘kit’ radio restoration – by Ken Kranz
98 Vintage Workbench
Tektronix T130 LC Meter, Part 3 – by Alan Hampel
Everything Else
2 Editorial Viewpoint
4 Mailbag – Your Feedback
65 Product Showcase
siliconchip.com.au
87 SILICON CHIP ONLINE SHOP
106 Ask SILICON CHIP
111 Market Centre
112
Notes
and Errata
Australia’s
electronics
magazine
112 Advertising Index
A Wideband RF Power Meter has
never been simpler to build. It goes
up to 6GHz, and is powered by an
Arduino Nano – Page 66
August 2020 1
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