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Contents SILICON CHIP www.siliconchip.com.au Vol.24, No.11; November 2011 Features 14 Power Your Pedal Pushie (Or Building An eBike) Riding a pushbike is great exercise until you come to hills and run out of puff! A “Magic Pie” wheel with a 48V electric motor is the answer – by Ross Tester 22 Steadicam: Taking The Bumps Out Of Movies, Pt.1 Steadicam, an ingenious system to stabilise TV & movie cameras, has been around for more than 30 years now. And during that time, it has continued to evolve – by Barrie Smith 74 Tektronix MDO4104-3 Mixed Domain Oscilloscope This innovative test instrument combines a digital storage oscilloscope with a logic analyser and a digital spectrum analyser – by Nicholas Vinen Build a G-Force Meter – Page 28. 28. Pro jects To Build 28 Build A G-Force Meter Based on the Inclinometer in the August 2011 issue, this little beauty reads out the g forces involved in acceleration, braking and cornering, be they forwards, backwards or sideways – by Andrew Levido & Nicholas Vinen 34 The MiniMaximite Computer This miniaturised unit can be embedded in other projects. It’s fully software compatible with the original Maximite, so you can develop programs on the original version, then transfer them to the MiniMaximite – by Geoff Graham The MiniMaximite Computer – Page 34. 62 Ultra-LD Stereo Preamplifier & Input Selector, Pt.1 Designed for use with the Ultra-LD Mk.3 amplifier, this high-quality unit features a motorised volume control and a separate 3-input selector board. Both are controlled by the same infrared remote – by John Clarke & Greg Swain 82 2.2-100V Zener Diode Tester Easy-to-build unit plugs into your digital multimeter and can check any zener diode rated from 2.2V to 100V. It can also check the forward voltage of diodes and test low-voltage Schottky diodes – by John Clarke Special Columns Stereo Preamplifier & Input Selector – Page 62. 44 Serviceman’s Log Hiring a new technician is never easy – by the Serviceman 57 Circuit Notebook (1) Upgrade For The Digital Insulation Meter; (2) 5-Level Logic Probe; (3) TwistGrip Throttle For The 12/24V 20A Speed Controller; (4) PICAXE-Based Digital RF Meter; (5) Battery Replacement For An AVO Mk.8 Multimeter 90 Vintage Radio 2.2-100V Zener Diode Tester – Page 82. The Astor P7G 8-Transistor AM Portable Radio – by Rodney Champness Departments   2   4 81 98 Publisher’s Letter Mailbag Product Showcase Ask Silicon Chip siliconchip.com.au 101 Coming Next Month 102 Order Form 103 Market Centre November 2011  1