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Contents Vol.22, No.10; October 2009 SILICON CHIP www.siliconchip.com.au Features 12 Review: The FLIR i5 Infrared Camera Just aim and shoot to get a false-colour picture showing the temperature gradients of a building, machinery, a human body or whatever. And it can function as a precise non-contact thermometer – by Leo Simpson 16 The Secret World Of Oscilloscope Probes Ever wondered what’s inside a scope probe? There’s more to them than just a resistive divider in combination with some capacitors. Here’s a look at how they really work – by Doug Ford FLIR i5 Infrared Camera Reviewed – Page 12. 42 How To Hand-Solder Very Small SMD ICs Provided you have the correct tools, hand-soldering very small SMDs to PC boards is much easier than you think. Here’s a run-down on how to do it – by Nicholas Vinen Pro jects To Build 26 A Universal I/O Board With USB Interface This easy-to-build board connects to a USB port on your laptop or desktop computer and will let you connect a host of digital and analog inputs/outputs. It works with Windows, Linux and Mac operating systems – by Dr Pj Radcliffe 34 High-Quality Stereo Digital-To-Analog Converter, Pt.2 Universal I/O Board with USB Interface – Page 26. Second article shows you how to assemble the PC board modules and make the connecting cables. Kits will be supplied with the SMDs soldered in place, to make the assembly easy – by Nicholas Vinen 62 Digital Megohm & Leakage Current Meter Looking for an electronic megohm & leakage current tester with LCD readout? This unit allows testing at either 500V or 1000V and can measure insulation resistances up to 999MΩ and leakage currents to below 1µA – by Jim Rowe 72 Using A Wideband O2 Sensor In Your Car, Pt.2 Pt.2 this month describes the construction and gives the installation and test details. There’s also an FAQ panel to make the job easy – by John Clarke Special Columns Building The High-Quality Stereo Digital-To-Analog Converter – Page 34. 44 Serviceman’s Log Weird faults from car electronics – by the Serviceman 57 Circuit Notebook (1) RS232 To IrDA Transmitter; (2) Replacement For A Power Transformer In A Valve Radio; (3) Audio Power Meter With Programmable Load; (4) Electronic Tank Gauge/Pump Control For Caravans & Boats; (5) Ultra-Low Power Flasher 88 Vintage Radio The development of AC mains power supplies, Pt.1 – by Rodney Champness Departments   2   4 71 83 Publisher’s Letter Mailbag Product Showcase Subscriptions siliconchip.com.au 93 98 101 102 Order Form Ask Silicon Chip Notes & Errata Market Centre Digital Megohm & Leakage Current Tester – Page 62. October 2009  1