Silicon ChipContents - November 2003 SILICON CHIP
  1. Outer Front Cover
  2. Contents
  3. Publisher's Letter: The valve circuit we said we would never publish
  4. Feature: Electronic Noses Smell A Big Future by Peter Holtham
  5. Order Form
  6. Feature: Logging Your Every Driving Moment by Julian Edgar
  7. Project: A 12AX7 Valve Audio Preamplifier by Jim Rowe
  8. Project: Our Best LED Torch EVER! by John Clarke
  9. Product Showcase
  10. Weblink
  11. Project: Smart Radio Modem For Microcontrollers by Nenad Stojadinovic
  12. Project: The PICAXE, Pt.8: The 18X Series by Stan Swan
  13. Project: A Programmable PIC-Powered Timer by Trent Jackson
  14. Feature: PC Board Design Tutorial, Pt.2 by David L. Jones
  15. Vintage Radio: The 1953 4-Valve Precedent Mantel Receiver by Rodney Champness
  16. Notes & Errata
  17. Market Centre
  18. Advertising Index
  19. Back Issues
  20. Book Store
  21. Outer Back Cover

This is only a preview of the November 2003 issue of Silicon Chip.

You can view 27 of the 104 pages in the full issue, including the advertisments.

For full access, purchase the issue for $10.00 or subscribe for access to the latest issues.

Items relevant to "A 12AX7 Valve Audio Preamplifier":
  • 12AX7 Valve Audio Preamplifier Main PCB [01111031] (AUD $10.00)
  • 12AX7 Valve Audio Preamplifier Power Supply PCB [01111032] (AUD $10.00)
  • ETD29 transformer components (AUD $15.00)
  • 12AX7 Valve Preamplifier PCB patterns (PDF download) [01111031/2] (Free)
Articles in this series:
  • A 12AX7 Valve Audio Preamplifier (November 2003)
  • Using The Valve Preamp In A Hifi System (February 2004)
Items relevant to "Our Best LED Torch EVER!":
  • 1W Star LED Torch PCB pattern (PDF download) [11211031] (Free)
Items relevant to "Smart Radio Modem For Microcontrollers":
  • Smart Radio Modem PCB patterns (PDF download) [06111031/2/3] (Free)
Items relevant to "The PICAXE, Pt.8: The 18X Series":
  • PICAXE-18A Temperature Logger source code (Software, Free)
Articles in this series:
  • PICAXE: The New Millennium 555? (February 2003)
  • The PICAXE: Pt.2: A Shop Door Minder (March 2003)
  • The PICAXE, Pt.3: Heartbeat Simulator (April 2003)
  • The PICAXE, Pt.4: Motor Controller (May 2003)
  • The PICAXE, Pt.5: A Chookhouse Door Controller (June 2003)
  • The PICAXE, Pt.6: Data Communications (July 2003)
  • The PICAXE, Pt.7: Get That Clever Code Purring (August 2003)
  • The PICAXE, Pt.8: A Datalogger & Sending It To Sleep (September 2003)
  • The PICAXE, Pt.8: The 18X Series (November 2003)
  • The PICAXE, Pt.9: Keyboards 101 (December 2003)
Items relevant to "A Programmable PIC-Powered Timer":
  • PIC16F628A-I/P programmed for the "Master of Time" PIC-based Programmable Timer [MOT.HEX] (Programmed Microcontroller, AUD $15.00)
  • PIC16F628A firmware for the "Master of Time" Programmable Timer [MOT.HEX] (Software, Free)
  • Programmable PIC-Powered Timer PCB pattern (PDF download) [04111031] (Free)
Articles in this series:
  • PC Board Design Tutorial, Pt.1 (October 2003)
  • PC Board Design Tutorial, Pt.2 (November 2003)
  • PC Board Design Tutorial, Pt.3 (December 2003)

Purchase a printed copy of this issue for $10.00.
Contents Vol.16, No.11; November 2003 www.siliconchip.com.au FEATURES 8 Electronic Noses Smell A Big Future Don’t sniff – electronic noses have a big future, from checking your morning coffee to sniffing out explosives. And they’re here now – by Peter Holtham 14 Logging Your Every Driving Moment Some airbag controllers do more than just trigger the airbags; they also log your speed and a range of other driving actions – by Julian Edgar 85 PC Board Design Tutorial, Pt.2 The basics of component placement and routing, plus a few tips to make your boards look good – by David L. Jones A 12AX7 Valve Audio Preamplifier – Page 24. PROJECTS TO BUILD 24 A 12AX7 Valve Audio Preamplifier And we swore we’d never do another valve audio project. Who was it that said “bottles” were dead? – by Jim Rowe 41 Our Best LED Torch . . . Ever! It’s based on a Luxeon Star/O 1W ultrabright LED, runs off two “D” cells and blasts our previous LED torches into the weeds! – by John Clarke 62 Smart Radio Modem For Microcontrollers This low-cost project will enable your Picaxe, Stamp or other microcontroller to communicate without wires – by Nenad Stojadinovic 74 The PICAXE, Pt.8: The 18X Series Our Best LED Torch . . . Ever – Page 41. You’ve guessed it: the Picaxe 08 chip has several big brothers. Here’s a look at the “18A” version, along with a simple temperature sensor – by Stan Swan 78 A Programmable PIC-Powered Timer This PIC-based timer can be set for any period from one second up to 680 days and even (theoretically) up to nearly 60 years – by Trent Jackson SPECIAL COLUMNS 36 Serviceman’s Log The JVC TV set that whistled – by the TV Serviceman 71 Circuit Notebook Smart Radio Modem For Microcontrollers – Page 62. (1) Making The Flexitimer Cycle On And Off; (2) Low Battery Indicator; (3) A Simple 9-Way Cable Identifier; (4) Clipping Indicator For Audio Amplifiers; (5) 8V DV Supply With Overvoltage Protection; (6) Cheap Switchmode DC-DC Converter 90 Vintage Radio The 1953 4-Valve Precedent Mantel Receiver – by Rodney Champness DEPARTMENTS 2 4 13 59 Publisher’s Letter Mailbag Order Form Product Showcase www.siliconchip.com.au 61 96 98 99 Silicon Chip Weblink Ask Silicon Chip Notes & Errata Market Centre/Ad Index Programmable PIC-Powered Timer – Page 78. November 2003  1