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Contents Vol.30, No.2; February 2017 SILICON CHIP www.siliconchip.com.au Features 14 Autonomous Flying Cars: your next mode of transport? When heavyweights such as Airbus and Larry Page start investing huge dollars, you’d better believe they’re serious! There have been a lot of false promises, but there are some flying cars actually in production – by Ross Tester 20 Getting Started with the Micromite It has become one of the most popular micros in Australia . . . but where and how do you start? By doing, of course – by Geoff Graham Autonomous Flying Cars – Page 14. 86 First look: Aussie-made battery soldering iron Battery-powered soldering irons have never really made the grade. Until Now! – by Ross Tester 93 First look: Icom’s VE-PG3 Radio over IP Gateway Regardless of what type of radio network you run, you can expand it to the next building or the next country with this interface from Icom – by Ross Tester 12-60V, 40A DC Motor Speed Controller – Page 64. Pro jects To Build 28 GPS-synchronised Analog Clock Driver Traditional analog clocks are fairly accurate, whether they have a swept or stepped second hand. Add this GPS driver and yours will be always 100% accurate, and you don’t even have to adjust it for daylight saving! – by John Clarke 40 Ultra-low-voltage Versatile LED Flasher Want to flash a LED . . . any LED, any colour? Want it really bright? Want to set the duty cycle or flash rate? This tiny module will do all this and more – and give you control like you’ve never had before – by Nicholas Vinen 46 El Cheapo Modules from Asia - Part 4 Measuring temperature and humidity with an AM2302/DHT22 – by Jim Rowe Icom’s VE-PG3 Radio over IP Gateway– Page 93 64 High Power DC Motor Speed Control – Part 2 Putting together our new 12-60V <at> up to 40A DC Motor Speed Controller . If you’re looking for REAL grunt, this is it! – Design by John Clarke 78 New SC200 Audio Amplifier – Part 2 The second installment of our all-new, all-performance 200W audio amplifier module. It’s easy to build – and uses no tiny surface-mount components – by Nicholas Vinen and Leo Simpson Building the SC200 Amplifier – Page 78 Special Columns 58 Serviceman’s Log A do-it-yourself snoring solution – by Dave Thompson 69 Circuit Notebook (1) Simple Motion Detector Alarm (2) “Squash” and “Ping-pong” two-player games using 16 LEDs (3) Using GPS Modules for Surveying (4) Signal Generator Buffer for Testing Amplifiers 88 Vintage Radio Hotpoint model P64MEX 4-valve – by Associate Professor Graham Parslow Incredibly versatile LED Flasher – Page 40. Departments 2 Publisher’s Letter 4 Mailbag siliconchip.com.au 96 SC Online Shop 98 Ask Silicon Chip 103 Market Centre    104 Advertising Index 104 Notes and Errata February 2017  1 www.facebook.com/siliconchipmagazine