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Contents Vol.32, No.10 October 2019 Features & Reviews 12 History of Cyber Espionage and Cyber Weapons, Part 2 Last month we looked at some of the techniques used. Now we move onto a lot of the ingenious hardware they used (and still use today). Some of it can even be bought over-the-counter! – by Dr David Maddison 34 Two new Arduino Nanos: the “Every” and the “33 IoT” We take an in-depth look at the latest offerings by Arduino . . . and we were very impressed. They’re very powerful but they’re low in cost – by Tim Blythman SILICON CHIP www.siliconchip.com.au They called it “The Thing” – a beautifully carved Great Seal of the USA, a gift from the Russians for the new US embassy in Moscow. But hidden inside was an incredibly clever passive “bug” and it was not discovered for many years! – Page 12. 61 Three Arduino Motor Driver Shields If you’re building anything with motors, you’ll need something to drive them. Here we look at three motor driving Arduino shields – by Tim Blythman Constructional Projects 22 45V, 8A Bench Power Supply to build This linear design will take pride of place on your work bench. It can supply up to 45V at 8A or even more at lower current – 50V <at> 2A. With current limiting and a very stable voltage it’s the one you’ve been waiting for – by Tim Blythman We’ve been promising this for many months – and here it is! This linear Bench Supply can deliver up to 45V at a whopping 8A! – Page 22 42 High resolution Audio Millivoltmeter/Voltmeter With unbalanced (<56µV-60V RMS) and balanced (<56µV-600mV RMS) inputs and a frequency range of 5Hz-110kHz +0, -3dB and accuracy of 0.1%, it’s another worthy test bench instrument. It runs off 5V DC (USB output or a 5V supply) – by Jim Rowe 76 Solving one of Home Automation’s biggest beefs! The interface between your home automation system and you is often the worst feature. Two new Arduino wallplates from Altronics, one with a touchscreen, look like going a long way to solving that problem – by Tim Blythman 91 Precision Audio Signal Amplifier You might not need it every day – unless you do testing and calibration every day – and then you’ll wonder how you got along without it! A perfect partner for above Audio Millivoltmeter – by Jim Rowe Your Favourite Columns Wow! Not one but two new Arduino Nanos: the Every and the 33 IoT. They might be cheap but they’re certainly not nasty! – Page 34 A high resolution Audio Millivoltmeter is a “must have” for the serious hobbyist or service tech – Page 42 70 Serviceman’s Log A shockingly cute new companion – by Dave Thompson 98 Circuit Notebook (1) (2) (3) (4) Three Norton (current feedback) amp based sinewave oscillators Amplifying audio signals using a MAX232CPE serial driver chip Multiple DS18B20 temperature sensors on a single, long wire Loudspeaker “thump” suppressor 105 Vintage Radio Healing M602T transistor mantel radio – by Ian Batty Everything Else 2 Editorial Viewpoint 4 Mailbag – Your Feedback 39 Product Showcase 40 SILICON CHIP ONLINE SHOP siliconchip.com.au   102 111 112 112 Ask SILICON CHIP Market Centre Advertising Index Notes and Errata And here’s another piece of test gear if you’re really serious! It’s a precision Audio Signal Amplifier so you know your measurements will be spot on! – Page 91 Want to get into Home Automation? These new “Inventa” wallplates from Altronics make interfacing easier – Page 76 www.facebook.com/siliconchipmagazine