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Contents Vol.32, No.2; February 2019 Features & Reviews 14 Medical, Health and First Aid Smartphone Apps - Part 1 There’s an enormous range of apps out there which allow your smartphone to do some pretty fancy diagnosis . . . or help your medical specialist treat your particular malady with vital, accurate data – by Dr David Maddison SILICON CHIP www.siliconchip.com.au Own a smartphone? Take advantage of the huge range of Android and iPhone apps and addons available (and more coming all the time) to keep track of your health – Page 14 30 Review: Rigol’s MSO5354 Mixed Signal Oscilloscope Tim Blythman takes a detailed “hands on” look at this latest model from Rigol (distributed by Emona). His verdict: “one we would definitely consider!” 35 El Cheapo Modules 22: Stepper Motor Drivers Last month we explained in detail how stepper motors worked. Here are three low-cost stepper motor drivers that you can use – by Jim Rowe 88 Review: Philips “Brilliance” Ultrawide Monitor When they say “brilliance” and “ultrawide”, they’re not exaggerating! It’s almost as big as your desk, meaning you can have so many windows open at once! And the quality? As they say, “brilliance” – by Nicholas Vinen Constructional Projects 20 Versatile Trailing Edge Dimmer with Touch Plate & IR Most dimmers are “leading edge” meaning they’re hopeless with most electronic lighting. Our new Trailing Edge Dimmer overcomes the problem – and gives you both touch plate AND infrared remote control! – by John Clarke Our new “trailing edge” dimmer has no problems with dimmable LEDs, CFLs, etc – and you can control it with an IR remote or via a touch plate – Page 20 Ever wanted something to switch a 12V circuit on when it detects movement? Here’s a cheap little project that will do exactly that! – Page 48 48 Motion-sensing 12V Power Switch Designed for a specific task but then we realised just how useful this circuit could be! It’s cheap, it’s simple . . . but it works like a little beauty! – by Nicholas Vinen 68 USB Mouse and Keyboard Interface for Micros Working with micros is fun – but how do you connect a USB mouse or keyboard to them? We solve that little problem with this one – by Tim Blythman 80 Our new DAB+ Tuner with FM and AM: Building it! Last month we told you about our world-beating DAB+/FM/AM receiver. Has that caused some interest! Now the fun begins: putting it together – by Duraid Madina Your Favourite Columns 42 Circuit Notebook (1) Making a cheap WiFi controlled relay board work (2) Modular quiz buzzer system (3) Electret mic “crystal” set (4) Four channel sound system using a single woofer How DO you interface a keyboard or mouse to a micro? With this nifty USB Keyboard & Mouse Interface, that’s how! – Page 68 We introduced our new world-beating DAB+/FM/AM receiver last month . . . now we get into the fun part: BUILDING IT! – Page 80 62 Serviceman’s Log (What) were the designers thinking? – by Dave Thompson 94 Vintage Radio Workbench 1970s BWD 216 Hybrid Bench Supply – by Ian Batty Everything Else! 2 Editorial Viewpoint 4 Mailbag – Your Feedback siliconchip.com.au 61 Product Showcase 102 SILICON CHIP Online Shop It’s not just wide, it’s ultrawide! The 49-inch curved Philips Brilliance 499P9H is “strongly recommended”   104    111    112    112 Ask SILICON CHIP Market Centre Advertising Index Notes and Errata – Page 88 www.facebook.com/siliconchipmagazine