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Contents SILICON CHIP www.siliconchip.com.au Vol.26, No.8; August 2013 Features   12  ADS-B & flightradar24.com Here’s something that will stop you in your tracks. It’s called “ADS-B” and via certain websites it lets you see, in real time, the location of commercial aircraft flying anywhere in the world – by Jim Rowe & Ross Tester   18  Adventure Cams: You’re Part Of The Action Tiny, wearable camcorders can get you up close and personal with the action! Here’s a look at the market leaders – by Ross Tester   24  Review: Tiny Scope Shoot-out PC Birdies: Feed It A Battery, Not Birdseed – Page 28. We take a look at two small DSOs: a credit card-sized scope from Seeed Studio and a combined DMM/scope from Jaycar – by Nicholas Vinen   76  Review: Samsung Chromebook This web-based notebook computer from Samsung costs just $345, comes with a 16GB SSD and works in the cloud – by Ross Tester Pro jects To Build   28  PC Birdies: Bird Song Without The Mess Ever wished you could have bird song in your home without a live caged bird? PC Birdies gives you not one but two sweetly singing birds – by John Clarke   40  Track Aircraft On Your Own ADS-B Receiving Station Want to monitor aircraft movements on your own computer screen? Just add a USB DVB-T dongle, an antenna and free software to receive and display ADS-B signals transmitted by planes as they fly over you – by Jim Rowe   57  Build An iPod Charger Adaptor Got a spare 5V plugpack lying around? Add this simple low-cost adaptor circuit and you can use it the charge any iPod – by John Clarke   60  Active RF Detector Probe For DMMs Track Aircraft Using A USB DVB-T Dongle & Free Software – Page 40. Simple adaptor lets you measure RF signals from below 100kHz to over 1GHz on your DMM – by Jim Rowe   82  1.5kW Induction Motor Speed Controller Revisions Readers have asked for several new features. This latest version includes those and solves a few remaining problems – by Nicholas Vinen Special Columns Build An iPod Charger Adaptor – Page 57.  34 Serviceman’s Log External HDDs: data recovery is not always a picnic – by Dave Thompson  72 Circuit Notebook (1) Keypad & LCD for the MiniMaximite; (2) Pre-regulator For A Precision Voltage Reference; (3) Extendable Mixer Circuit; (4) Bar & Dot Display With BCD Decoders   90  Vintage Radio Restoring a 1946 HMV Model 456A mantel radio – by Graham Parslow Departments   2 Publisher’s Letter   4 Mailbag siliconchip.com.au  80 Product Showcase   96  Online Shop  98 Ask Silicon Chip 102 Subscriptions 103 Market Centre 104  Notes & Errata Active RF Detector Probe For DMMs – Page 60. August 2013  1