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Contents SILICON CHIP www.siliconchip.com.au Vol.26, No.9; September 2013 Features 14 Speedometer Head-Up Displays OBDII or GPS-based head-up displays (HUDs) can be purchased for around $100 and are far more accurate than your vehicle’s own speedometer – by Leo Simpson & Nicholas Vinen 22 Graphene: 300 Times Stronger Than Steel It’s super-strong, super-thin and has a vast range of exciting applications in electronics and materials science – by Dr David Maddison 28 Review: Bush TR82DAB DAB+/FM/AM/LW Radio This classic design looks almost identical to the original 1959 Bush transistor radio (described this month in Vintage Radio) but incorporates modern circuitry with FM and DAB+ reception – by Leo Simpson Speedometer Corrector Mk.3 – Page 32 82 Review: Altium Designer 2013 PCB Layout Software Successor to the popular Autotrax and Protel ECAD programs, Altium Designer has a lot more features and capabilities than its predecessors. We take a look at the latest version – by Nicholas Vinen Pro jects To Build 32 Speedo Corrector, Mk.3 If you’ve swapped your car’s wheels, instrument panel, gearbox or differential, your speedometer may no longer be correct. This Speedo Corrector can fix that problem. It operates from 12V or 24V DC and is easy to build – by John Clarke 42 Collinear Antennas For Aircraft ADS-B Signals Want to pick up aircraft ADS-B signals over a greater range than is possible using the antenna supplied with USB DVB-T dongles? These collinear antennas will do the job and can also be made for other frequencies – by Ross Tester Collinear Antennas For Aircraft ADS-B Signals – Page 42 64 LifeSaver For Lithium & SLA Batteries Don’t ruin an expensive SLA, Li-Ion, Li-Po or LiFePO4 battery by overdischarging it. This small circuit will protect it by cutting off power before it reaches the danger zone – by Nicholas Vinen 70 Simple 12V/24V Regulator For 70V Solar Panels Want to run 12V lights and accessories independently of the 230VAC mains supply? With a 72W solar panel, this simple regulator and a 12V SLA battery, you can run a string of LED lights anywhere and at any time – by Branco Justic LifeSaver For Lithium & SLA Batteries – Page 64. Special Columns 58 Serviceman’s Log Another day, another dropped phone or tablet – by Dave Thompson 78 Circuit Notebook (1) MiniMaximite Version Of The 10-Channel Remote Control Receiver; (2) UV Light Box & Timer With LED Array; (3) Arduino Temperature & Humidity Data Logger 91 Vintage Radio Best Of British: the Bush TR82C Mk.2 transistor radio – by Ian Batty Departments   2 Publisher’s Letter   4 Mailbag siliconchip.com.au 27 Subscriptions 40 Product Showcase 96 98 103 104 Online Shop Ask Silicon Chip Market Centre Notes & Errata Simple 12V/24V Regulator For 70V Solar Panels – Page 70. September eptember 2013  1 2013  1