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Contents Vol.33, No.9 September 2020 SILICON CHIP www.siliconchip.com.au Features & Reviews 12 5G Mobile Networks 5G is the newest iteration in a long line of cellular network standards. Apart from the often-touted (large) speed and bandwidth increase, we look at what else is new and how it actually works – by Dr David Maddison 32 The History of the Australian General Purpose Outlet The ubiquitous three-pin power plug and socket as used in Australia, New Zealand and the South Pacific is a simple but effective design. In this article we look at how the design came about and where it came from – by John Hunter 72 Advanced Vehicle Diagnostics with OBD2 The OBD2 standard lets you easily troubleshoot the increasingly complex vehicles that are on the road today. This article details the various OBD2 dongles that are available and how to use them – by Nenad Stojadonovic It seems like nearly everyone’s been talking about 5G recently. So we thought we’d join in, by describing how it works and where it differs from its predecessors – Page 12 Constructional Projects 24 High Power Ultrasonic Cleaner This easy-to-build Ultrasonic Cleaner is ideal for cleaning large items like mechanical parts and fabrics. All you need is a suitable ‘bath’ made from stainless steel, aluminium or plastic and away you go – by John Clarke 42 A Shirt-pocket Sized Audio DDS Oscillator This compact little audio oscillator provides you with an accurate sinewave wherever you need it. It displays the output frequency on a 64x32 pixel OLED screen and is housed in a 3D-printed case – by Andrew Woodfield 68 The Night Keeper Lighthouse Finally, it’s actually here! Our High Power Ultrasonic Cleaner is ready just in time for spring – Page 24 This portable oscillator generates a sinewave from 1Hz all the way up to 9999Hz with 0.002% accuracy – Page 42 A perfect project for beginners. This small PCB uses fewer than 10 components and serves as a good introduction to basic electronics. It can also double as a night light for young kids once they’ve built it – by Andrew Woodfield 86 USB SuperCodec – part two This month we cover all the details on the circuit design of the SuperCodec. Since the SuperCodec can also be used as a signal analysis system, in addition to its recording and playback functions, there is a lot to explain in terms of how each section of the project works – by Phil Prosser Your Favourite Columns 49 Circuit Notebook As a nice, simple project, this lighthouse serves as a great introduction to electronics, in part due to how few components it uses – Page 68 (1) Low-power flashing LED thermometer (2) Adjustable power supply using a fixed voltage switchmode regulator (3) Giant 1024-pixel RGB LED clock 61 Serviceman’s Log Troubleshooting temperamental tea – by Dave Thompson 96 Vintage Radio US Marine Corps TBY-8 squad radio – by Ian Batty Everything Else 2 Editorial Viewpoint 4 Mailbag – Your Feedback siliconchip.com.au 85 Product Showcase 104 Silicon Chip Online Shop 106 Ask SILICON CHIP 111 Market Centre Australia’s magazine 112 Noteselectronics and Errata 112 Advertising Index Cover Image: www.jbsa.mil/News/Photos/igphoto/2002310276/ OBD2 dongles are great tools to help you maintain (or even modify) your vehicle. Here’s how to choose one and how to use it – Page 72 September 2020  1 www.facebook.com/siliconchipmagazine