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Contents Vol.28, No.4; April 2015 SILICON CHIP www.siliconchip.com.au Features 16 Airborne Weather Radar: Keeping Aircraft Safe Airborne weather radar enables aircraft to avoid extreme weather to ensure safety and passenger comfort. We take a look at the technology and the huge advances that have been made in recent years – by Dr David Maddison 24 Review: National Instruments VirtualBench VirtualBench is a computer-driven 2-channel 100MHz digital oscilloscope, 34-channel logic analyser, waveform generator, 3-output adjustable power supply and multimeter, all in one box. It also mates with National Instruments’ LabView software for automated measurement & testing – by Nicholas Vinen 89 Review: Keysight MSO-X 3104T Oscilloscope Appliance Insulation Tester – Page 30. Keysight’s updated MSO-X 3104T midrange scope adds a number of new features, including a touch-screen, without a price increase. Nor is there any need to return the unit to a service centre to upgrade the bandwidth all the way from 100MHz to 1GHz – by Nicholas Vinen Pro jects To Build 30 Appliance Insulation Tester Do you think that your 230VAC-powered tools and appliances are safe because they are double-insulated? The only way to be reasonably sure is to test them using our new Appliance Insulation Tester – by John Clarke 42 A Really Bright 12/24V LED Oyster Light Got a boat, RV or 4WD, etc? Here’s a low-cost, 1000+ lumen “Oyster” LED light fitting for when you don’t have mains available (or even if you do). It runs from 12-24VDC or from 230VAC via an optional mains adaptor – by Ross Tester 58 Build A Low-Frequency Distortion Analyser Concerned about the quality of your 50Hz 230VAC supply? Want to measure the harmonic distortion of the lower frequencies from your loudspeaker system? This unit will measure the distortion of any 3-20VAC sinewave signal in the range of 20Hz-10kHz – by Nicholas Vinen A Really Bright 12/24V LED Oyster Light – Page 42. 72 WeatherDuino Pro2 Wireless Weather Station, Pt.2 Second article this month describes the transmitter circuit and the assembly details. We also describe the software installation and look at the various sensors that are available – by A. Caneira & Trevor Robinson Special Columns 53 Serviceman’s Log I hate letting anything beat me – by Dave Thompson Build A Low-Frequency Distortion Analyser – Page 58. 80 Circuit Notebook (1) Hard Drive Brushless Motor Controller With Speed Control; (2) Lithium Battery Cell Equaliser; (3) PICAXE-Based Next Number Display System 84 Vintage Radio The AWA 897P: Australia’s first transistor radio – by Ian Batty Departments   2 Publisher’s Letter   4 Mailbag 67 Product Showcase siliconchip.com.au 92 Ask Silicon Chip 95 Market Centre 96 Advertising Index 96 Notes & Errata WeatherDuino Pro2 Wireless Weather Station, Pt.2 – Page 72. April 2015  1