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Contents Vol.14, No.1; January 2001 FEATURES 4 LP Resurrection: Transferring LPs & Tapes To CD PC multimedia technology makes it easy to transfer your LPs and tapes to CD. You can even clean up the sound in the process – by Greg Swain 14 Biorecognition: Checking Your Identity Keys and access cards are on the way out. Biorecognition machines can check that you really are who you say you are – by Jon Reid 32 Look Mum, No Cables Wireless networks are gaining in popularity and costs are coming down. Here’s one that’s a cinch to install – by Greg Swain LP Resurrection: Transferring LPs & Tapes To CD – Page 4. PROJECTS TO BUILD 22 The LP Doctor: Cleaning Up Clicks & Pops It cleans up clicks, pops and noise on LPs and even includes a stereo RIAA phono preamplifier – by Leo Simpson & John Clarke 36 The WaveMaker: An Arbitrary Waveform Generator Use this simple circuit with your PC to generate oddball waveforms. It does standard sine, triangle and square waves as well – by David Sibley 66 2-Channel Guitar Preamplifier, Pt.3 The LP Doctor: Cleaning Up Clicks & Pops – Page 22. Final article shows you how to build the preamps and reverb module into a metal rack case – by John Clarke 72 Digital Reverb – The Missing Pages We messed up and two pages from last month’s article went missing. The person responsible has been sent to a Siberian salt mine. 76 PIC Programmer & TestBed Got a concept you’d like to try before building a full prototype? This unit lets you test new PIC circuits and is great for learning too – by Barry Hubble. The WaveMaker Arbitrary Waveform Generator – Page 36. SPECIAL COLUMNS 56 Serviceman’s Log Ain’t no mountain high enough – by the TV Serviceman 86 Vintage Radio The 32V 5-Valve Operatic Mignon – by Rodney Champness DEPARTMENTS 2 53 55 61 64 Publisher’s Letter Product Showcase Electronics Showcase Circuit Notebook Mailbag 75 91 93 94 96 Subscriptions Form Ask Silicon Chip Notes & Errata Market Centre Advertising Index PIC Programmer And TestBed – Page 76. January 2001  1