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Vol.8, No.11; November 1995 Contents ▲ FEATURES 4 LANsmart: A LAN For Home Or A Small Office If you have more than one computer, a local area network may be just what you need. LANsmart is one networking system that’s easy to install & get going – by Bob Flynn 16 Programmable Fuel Injection Control New software now makes it easy to quickly program engine management control units. We take a look at how it’s done – by Julian Edgar PROJECTS TO BUILD 22 A Mixture Display For Fuel Injected Cars This simple circuit can be used to monitor the behaviour of the engine control module in your car. It uses just one IC, 10 LEDs and a few minor parts – by Julian Edgar 28 A CB Transverter For The 80M Amateur Band It converts a 40-channel AM/SSB CB radio to the popular 80-metre amateur band – by Leon Williams, VK2DOB 44 Build A Low-Cost PIR Movement Detector Based on a universal PIR chip, this design is easy to build and can be adjusted for sensitivity and output duration. It can also be set so that it triggers only when it gets dark – by Conrad Marder MIXTURE DISPLAY FOR FUEL INJECTED CARS – PAGE 22 60 Dolby Pro Logic Surround Sound Decoder, Mk.2 This fully-featured design includes three power amplifiers, an effects facility and a 2-digit LED display to indicate the delay time. Build it for big movie sound in your own home – by John Clarke 79 Digital Speedometer & Fuel Gauge For Cars, Pt.2 Update your car’s dashboard to a fancy electronic display. Part 2 has the full constructional and calibration details – by Jeff Monegal 90 Build A PC-Controlled Robot From Surplus Parts This cheap and cheerful introduction to robotics uses surplus stepper motors plus two SILICON CHIP stepper motor control boards – by Tony Mercer SPECIAL COLUMNS BUILD THIS CB TRANSVERTER FOR THE 80-METRE AMATEUR BAND– PAGE 22 41 Remote Control Are R/C transmitters a health hazard? ­by Bob Young 69 Serviceman’s Log How friendly is “user friendly”? – by the TV Serviceman 86 Vintage Radio How good are TRF receivers? – by John Hill DEPARTMENTS 2 Publisher’s Letter 8 Circuit Notebook 10 Mailbag 27 Order Form 57 Product Showcase 100 Ask Silicon Chip 102 Market Centre 104 Advertising Index DOLBY PRO LOGIC SURROUND SOUND DECODER, MK.2 – PAGE 60 November 1995  1