Fullscreen HTML5Med Res (??MB)HTML4

Contents Vol.22, No.9; September 2009 SILICON CHIP www.siliconchip.com.au Features 35 Introducing OLED Displays Organic LED technology is now affordable for the hobbyist. Here’s a look at some available OLED screens and modules plus a circuit to make a simple oscilloscope – by Mauro Grassi 40 Review: At Last . . . An Affordable Logic Analyser The Saleae Logic costs just $US149 and has eight channels that can record millions of samples at up to 24MHz – by Geoff Graham High-Quality Stereo Digital-ToAnalog Converter – Page 12. 64 Pebble: PICAXE Electronic Bread Board Layout Emulator Free software allows you to produce a professional-looking diagram that shows how a circuit was laid out on a breadboard – by Wayne Geary Pro jects To Build 12 High-Quality Stereo Digital-To-Analog Converter, Pt.1 Build this high-quality Stereo DAC for superb hum-free sound from your DVD player. It accepts both optical (TOSLINK) and coaxial inputs and has left & right audio outputs for connection to your hifi system – by Nicholas Vinen 26 Using A Wideband O2 Sensor In Your Car, Pt.1 Want to accurately measure air-fuel ratios over a wide range? This “Wideband Controller” mates with a Bosch wideband O2 sensor and our Wideband Display Unit and can be used for precise engine tuning – by John Clarke Using A Wideband O2 Sensor In Your Car – Page 26. 72 Build A Simple Seismograph On A Protoboard Build a seismograph on protoboard using a PICAXE-08M, Pebble it and transfer it to a Kiwi Patch Board – by Stan Swan 75 Autodim Add-On For The 6-Digit GPS Clock It senses the ambient light so that a modified program running in the display unit’s micro can adjust the display LED brightness – by Jim Rowe 82 3-Channel UHF Rolling-Code Remote Control, Pt.2 Second article describes how to complete the construction and get the transmitter and receiver units talking to each other – by John Clarke Build A Simple Seismograph On A Protoboard – Page 72. Special Columns 44 Circuit Notebook (1) FireWire-Sensing Mains Power Switch; (2) A Discrete Op Amp For Audio Use; (3) Temperature-Sensing Battery Charger Cut-Out; (4) 6-Digit PICAXE Timer; (5) Relays Can Do It By Themselves; (6) High-Current Voltage Doubler 57 Serviceman’s Log Why do such things only ever happen to me? – by the Serviceman Building The 3-Channel UHF RollingCode Remote Control – Page 82. 88 Vintage Radio The Kellogg TRF receiver – by Rodney Champness Departments   2   4 62 93 Publisher’s Letter Mailbag Product Showcase Subscriptions siliconchip.com.au 94 97 99 102 Ask Silicon Chip Notes & Errata Order Form Market Centre September 2009  1