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Contents Vol.21, No.1; January 2008 SILICON CHIP www.siliconchip.com.au Features   10  Review: Denon DCD-700AE Compact Disk Player Looking for a CD player with superlative performance? The Denon DCD700AE delivers the goods – by Leo Simpson   28  PICAXE VSM: The PICAXE Circuit Simulator! Ever wondered whether your latest brilliant PICAXE project idea would actually work? Now you can find out before you build it, with the new PICAXE circuit simulator software – by Clive Seager PIC-Controlled Swimming Pool Alarm – Page 14. Pro jects To Build   14  PIC-Controlled Swimming Pool Alarm Reduce the possibility of a drowning in your swimming pool with this “smart” Pool Alarm. If someone falls in, a loud siren sounds – by John Clarke   32  Emergency 12V Lighting Controller This easy-to-build project automatically turns on 12V emergency lights within a second or two of a mains power failure – by Jim Rowe   58  Build The “Aussie-3” Valve AM Radio So you thought valve technology was dead? It is – but we have exhumed enough of it to produce a unique 3-valve radio – by Keith Walters Emergency Lighting Controller – Page 32.   72  The Minispot 455kHz Modulated Oscillator Build this simple circuit and use it to align the intermediate frequency (IF) stages of any AM broadcast or shortwave radio – by Mauro Grassi   80  Water Tank Level Meter, Pt.3: The Base Station Designed for use with up to 10 Water Tank Level Meters, this Base Station lets you monitor water levels inside your home. Also included is an option for electric pump control – by John Clarke   89  Improving The Water Tank Level Meter Pressure Sensor Here’s a few tips on improving the in-tank set-up plus an improved method for mounting the pressure sensor externally – by John Clarke Special Columns  40 Circuit Notebook (1) Nicad Cell Discharger; (2) CFL Inverter With Overload Protection; (3) Spa Heater Control Build The “Aussie-3” Valve AM Radio – Page 58.   44  Serviceman’s Log Tinker, tailor, espresso machine fixer – by the TV Serviceman   92  Vintage Radio The simple Aristone M1 4-valve mantel receiver – by Rodney Champness Departments   2  Publisher’s Letter   4 Mailbag  57  Order Form siliconchip.com.au   97  Ask Silicon Chip 100  Notes & Errata 101  Market Centre Water Tank Level Meter Base Station – Page 80. January anuary 2008  1