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Practical
Electronics
olume . o.
e ruary
ISSN 2632 573X
Contents
Pro ects and Circuits
Remote Monitoring Station by Tim Blythman
A couple of Arduino shields and a little software lets you monitor valuable or
important locations and even remotely trigger actions and avoid problems!
16
Low-distortion DDS Signal Generator by Phil Prosser
This two-channel audio-signal generator produces very low distortion sinewaves
as well as triangle waves, square waves, pulse trains and noise.
26
Indoor Poor Air uality onitor by Geoff Graham
Measure air quality with this Micromite-BackPack-based volatile organic
compound (VOC) meter.
32
ogic Analysers by Jim Rowe
Overview of an 8-channel USB logic analyser that is essentially a clone of the
well-known and respected Saleae Logic unit – but cost just £8.
39
The Fox Report by Barry Fox
Smart meters follow-up
8
Techno Talk by Mark Nelson
Dare we laugh about scams?
10
eries
eatures and Columns
Net Work by Alan Winstanley
he latest u dates to
a on ire oogle
hro ecast and evolo s
extender; plus the charging trials of being an EV early adopter.
Written in Britain, Australia,
the US and Ireland.
Read everywhere.
© Electron Publishing Limited 2021
Copyright in all drawings, photographs, articles,
technical designs, software and intellectual property
published in Practical Electronics is fully protected,
and reproduction or imitation in whole or in part are
expressly forbidden.
The March 2021 issue of Practical Electronics will be
published on Thursday, 4 February 2021 – see page 72.
Practical Electronics | February | 2021
12
Audio ut by Jake Rothman
here in udio
lifier
art
42
Circuit urgery by Ian Bell
Simulation issues with a digital divide-by-two circuit
46
Make it with Micromite by Phil Boyce
Part 25: MMBASIC, Micromite and Maximite varieties
52
Practically
ea ing by Jake Rothman
Restoring old equipment – Part 2
56
a s Cool eans y ax The agnificent
Flashing LEDs and drooling engineers – Part 12
60
Electronic uilding loc s by Julian Edgar
ireless hone charging ad
64
Wireless for the Warrior
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