Silicon ChipContents - April 2008 SILICON CHIP
  1. Outer Front Cover
  2. Contents
  3. Publisher's Letter: Your future electric car may use ultracapacitors
  4. Feature: Beyond The Capacitor There Is The Ultracapacitor by Ross Tester
  5. Feature: How To Get Into Digital TV, Pt.2 by Alan Hughes & Leo Simpson
  6. Project: Charge Controller For 12V Lead-Acid Or SLA Batteries by John Clarke
  7. Project: A Safe Flash Trigger For Your Digital SLR Camera by Ross Tester
  8. Project: 12V-24V High-Current DC Motor Speed Controller, Pt.2 by Mauro Grassi
  9. Project: Two-Way Stereo Headphone Adaptor by Mauro Grassi
  10. Vintage Radio: Shortwave converters from the 1930s by Rodney Champness
  11. Book Store
  12. Advertising Index
  13. Order Form

This is only a preview of the April 2008 issue of Silicon Chip.

You can view 29 of the 96 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.

Articles in this series:
  • How To Get Into Digital TV (March 2008)
  • How To Get Into Digital TV, Pt.2 (April 2008)
Items relevant to "Charge Controller For 12V Lead-Acid Or SLA Batteries":
  • 12V Lead-Acid Charge Controller PCB [14104081] (AUD $12.50)
  • PIC16F88-I/P programmed for the 12V Battery Charge Controller [1410408A.HEX] (Programmed Microcontroller, AUD $15.00)
  • PIC16F88 firmware and source code for the 12V Lead-Acid or SLA Battery Charge Controller [1410408A.HEX] (Software, Free)
  • 12V Lead-Acid or SLA Battery Charge Controller PCB pattern (PDF download) [14104081] (Free)
  • 12V Lead-Acid or SLA Battery Charge Controller front panel artwork (PDF download) (Free)
Items relevant to "12V-24V High-Current DC Motor Speed Controller, Pt.2":
  • PIC16F88-I/P programmed for the DC Motor Speed Controller [0910308A.HEX] (Programmed Microcontroller, AUD $15.00)
  • PIC16F88 firmware and source code for the 12-24V High Current Motor Speed Controller [0910308A.HEX] (Software, Free)
  • 12-24V High-Current Motor Speed Controller main PCB pattern (PDF download) [09103081] (Free)
  • 12-24V High-Current Motor Speed Controller display PCB pattern (PDF download) [09103082] (Free)
Articles in this series:
  • 12V-24V High-Current DC Motor Speed Controller, Pt.1 (March 2008)
  • 12V-24V High-Current DC Motor Speed Controller, Pt.2 (April 2008)
Items relevant to "Two-Way Stereo Headphone Adaptor":
  • Stereo Headphone Adaptor PCB [01104081] (AUD $15.00)
  • Two-Way Stereo Headphone Adaptor PCB pattern (PDF download) [01104081] (Free)
  • Two-Way Stereo Headphone Adaptor front panel artwork (PDF download) (Free)
  • Two-Way Stereo Headphone Adaptor rear panel artwork (PDF download) (Free)

Purchase a printed copy of this issue for $10.00.
Contents Vol.21, No.4; April 2008 SILICON CHIP www.siliconchip.com.au Features 12 Beyond The Capacitor There Is The Ultracapacitor Don’t think microfarads . . . start thinking in KILOFarads! They could represent the next big breakthrough in electric vehicle technology – by Ross Tester 22 How To Get Into Digital TV, Pt.2 What you need to do about the antenna for reliable interference-free reception – by Alan Hughes What You Need To Do About The Antenna For Digital TV – Page 22. Projects To Build 30 Charge Controller For 12V Lead-Acid Or SLA Batteries Upgrade your standard 12V lead-acid or SLA battery charger to a complete 2-step or 3-step charger with this easy-to-build unit. It prevents battery damage and allows the battery to be left connected to the charger – by John Clarke 58 A Safe Flash Trigger For Your Digital SLR Camera Don’t fry your digital SLR’s flash trigger contacts! Build the $5 Safe-T-Flash and set the flash trigger voltage to a safe level – by Ross Tester 64 12V-24V High-Current DC Motor Speed Controller, Pt.2 Last month, we described the circuit and software features of our new HighCurrent DC Motor Speed Controller. This month, we show you how to build and test it – by Mauro Grassi 70 Two-Way Stereo Headphone Adaptor No headphone output on your stereo amplifier? This adaptor connects between your amplifier and loudspeakers, has several operating modes and features two output sockets with individual volume controls – by Mauro Grassi Special Columns 40 Circuit Notebook (1) Regenerative Shortwave Radio Receiver Has Audio Limiter; (2) Timer Has Zero Current After Shutdown; (3) Two-Way Active Crossover Uses Transconductance Amplifiers; (4) Magnetic Proximity Switch; (5) Simple 9V Battery Tester Charge Controller For 12V Lead-Acid Or SLA Batteries – Page 30. Safe Flash Trigger For Digital SLR Cameras – Page 58. 53 Serviceman’s Log Are things getting too complicated? – by the TV Serviceman 80 Vintage Radio Shortwave converters from the 1930s – by Rodney Champness Departments   2   4 17 79 Publisher’s Letter Mailbag Order Form Products Showcase siliconchip.com.au 88 91 92 94 Ask Silicon Chip Notes & Errata Back Issues Market Centre 2-Way Stereo Headphone Adaptor – Page 70. MApril arch 2008  1