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Contents Vol.10, No.7; July 1997 FEATURES   4  Electric Vehicles: Where Are They Now? Electric vehicles are making it to market in the USA. We take a look at the latest offerings from GM, Ford and Toyota – by Sammy Isreb   7  Review: Philips 48-Inch Rear Projection TV No, it’s not like the projection TVs you’ve seen in clubs. This unit has a big, bright, beautiful picture & it won’t break the bank – by Leo Simpson 66  How Holden’s Electronic Control Unit Works; Pt.1 Electric Vehicles: Where Are They Now? – Page 4 We unravel some of the mysteries hidden in this very clever engine management system – by Julian Edgar PROJECTS TO BUILD 14  Infrared Remote Volume Control Simple unit controls a dual-ganged pot & two relays. Build it for your stereo system or model railway – by Leo Simpson 23  A Flexible Interface Card For PCs Addressable I/O card plugs into the parallel port & has eight opto-isolated inputs & eight relay outputs – by Rick Walters 29  Points Controller For Model Railways Infrared Remote Volume Control – Page 14 Build this $10 circuit & prevent solenoid coil burnouts in your points switching machines – by Rick Walters 42  Simple Waveform Generator Compact unit generates square & triangle waves from 100Hz to 20kHz. Use it to test amplifiers, filters, tone decoders & digital circuits – by John Clarke 54  Colour TV Pattern Generator; Pt.2 The operation may be complicated but it’s easy to build – by John Clarke SPECIAL COLUMNS Flexible Interface Card For PCs – Page 23 38  Serviceman’s Log The neighbour who made things worse – by the TV Serviceman 63  Computer Bits Removing programs from Windows 95 – by Jason Cole 78  Radio Control An in-line mixer for radio control receivers – by Bob Young 82  Vintage Radio Revamping an old Radiola – by John Hill DEPARTMENTS  2  Publisher’s Letter 22  Order Form 32  Circuit Notebook 71 Bookshelf 75  Product Showcase 91  Ask Silicon Chip 93  Notes & Errata 94  Market Centre 96 Advertising Index Simple Square/Triangle Waveform Generator – Page 42 July 1997  1