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Contents Vol.28, No.7; July 2015 SILICON CHIP www.siliconchip.com.au Features   14  Electronics & The Queensland Boat Show Electronics is now the driving force in boating, with new products being released every month. To see where it’s heading, we visited the recent Sanctuary Cove International Boat Show and the Gold Coast Marine Expo – by Kevin Poulter   20  The Pawsey Supercomputing Centre Build A Driveway Monitor – Page 26. Just what is a supercomputer and what do you use it for? We take you inside the Pawsey Supercomputing Centre to see Magnus, the fastest and most powerful supercomputer in the Southern Hemisphere – by Geoff Graham   74  The Bionic Eye: Artificial Vision, Pt.2 Providing artificial vision for the blind is the holy grail of vision impairment research. We take a look at the work that’s currently going on in pursuit of that lofty goal – by Dr David Maddison Pro jects To Build   26  Build A Driveway Monitor, Pt.1 Based on a Honeywell magneto-resistive sensor, this Driveway Monitor is dead simple to install. It provides audible & visual indication when a vehicle is detected or can be built to activate a remote-controlled mains switch to turn on lights etc – by John Clarke Install USB Charging Points In Your Car’s Reading Light Assembly – Page 36.   36  Install USB Charging Points In Your Car Fitting USB charging points to your car’s reading lamp assembly makes it easy to power dashcams, GPS satnav units and smartphones. This unit is built on a tiny PCB, fits into you car’s reading lamp housing (or wherever you can fit it) and can power one or two USB outlets – by Nicholas Vinen   60  Intelligent Charger For Nicad & NiMH Batteries Cheap chargers supplied with original equipment can (and often do) damage the battery but proper chargers are usually expensive. This low-cost, easyto-build intelligent Nicad/NiMH Battery Charger is suitable for automatically charging a wide range of batteries – by Peter Hayles   80  Ultra-LD Mk.4 200W RMS Power Amplifier: Preview This new power amplifier module has the same 200W RMS power output as the Ultra-LD Mk.3 from July 2011 but has even better performance, better parts availability and a smaller footprint. Here’s a preview – by Nicholas Vinen Intelligent Charger For Nicad & NiMH Batteries – Page 60. Special Columns   54  Serviceman’s Log More than one string to my servicing bow – by Dave Thompson  70 Circuit Notebook (1) 4-Channel IR Remote Switch With Toggle & Latch Modes; (2) TemperatureControlled Solar Hot Water Tank; (3) Hazard Lights & Turn Signals For A Tractor   83  Vintage Radio Stromberg-Carlson’s 78T11/79T11 transistor set – by Ian Batty Departments   2 Publisher’s Letter   4 Mailbag siliconchip.com.au   53  Product Showcase   90  Ask Silicon Chip 95 Market Centre 96 Advertising Index 96  Notes & Errata Ultra-LD Mk.4 200W RMS Power Amplifier Preview – Page 80. April 2015  1 July 2015  1