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Contents Vol.27, No.5; May 2014 SILICON CHIP www.siliconchip.com.au Features 14 Android Apps For Tech-Savvy Users Android Apps For Tech-Savvy Users – Page 14. With an Android smartphone (or tablet), you can do so much more than make calls or send texts. For anyone into electronics, it can virtually be a test bench in your pocket. Here’s a look at some of the more useful apps – by Stan Swan 71 The GertDuino Board From element14 Can’t decide whether you like the Raspberry Pi or Arduino better? Well now you can combine them both – by Nicholas Vinen 88 Review: Tektronix MDO3054 Mixed-Domain Oscilloscope This DSO can be had with a logic analyser, 3GHz spectrum analyser, arbitrary waveform generator and digital voltmeter all in a single package. It’s featurepacked and has 10Mpoints memory per channel standard – by Nicholas Vinen Pro jects To Build 22 RGB LED Strip Controller/Driver Compact module drives up to six red/green/blue flexible LED strips to produce a rainbow of colours in multiple eye-catching patterns. It can be battery-powered and used anywhere you want a bright, pulsating light show – by Nicholas Vinen 28 The Micromite: An Easily Programmed Microcontroller, Pt.1 Want to use a powerful microcontroller in your next project? This low-cost PIC32 micro comes loaded with a Microsoft-compatible BASIC interpreter and programming it is easy. Pt.1 this month describes its features and shows you how to use it to build a GPS-Controlled Digital Clock – by Geoff Graham RGB LED Strip Controller/ Driver – Page 22. 60 40V Switchmode/Linear Bench Power Supply, Pt.2 Second article describes the operation of the linear regulator circuit, discusses the PCB layout design and gives the PCB assembly details – by Nicholas Vinen 72 Deluxe 230VAC Fan Speed Controller Got a ceiling fan or pedestal fan? With limited speed settings they are often too fast or too slow. This controller gives you continuous speed control and can also be used as a dimmer for desk lamps rated at up to 60W – by John Clarke Special Columns The Micromite: Use It To Build A GPS-Controlled Clock – Page 28. 42 Serviceman’s Log A close shave for a fancy shaver – by Dave Thompson 57 Circuit Notebook (1) Simple Circuit For Demonstration Of LED Spectra; (2) Battery Capacity Meter For Electric Bikes 82 Salvage It! What can you do with a dead UPS . . . or two? – by Bruce Pierson 92 Vintage Radio The AWA B30: a transistor radio just like grandma’s – by John Carr Departments   2 Publisher’s Letter   4 Mailbag siliconchip.com.au 40 Product Showcase 95 Subscriptions 96 98 103 104 Online Shop Ask Silicon Chip Market Centre Notes & Errata 230VAC Fan Speed Controller – Page 72. May 2014  1