Silicon ChipReader feedback is welcome - April 2005 SILICON CHIP
  1. Outer Front Cover
  2. Contents
  3. Publisher's Letter: Reader feedback is welcome
  4. Feature: Install Your Own In-Car Video by Gary Rollans
  5. Project: Build A MIDI Theremin, Pt.1 by John Clarke
  6. Feature: The Start Of Colour TV In Australia, Pt.2 by Keith Walters
  7. Project: Bass Extender For Hifi Systems by Rick Walters
  8. Project: Build A Professional Sports Scoreboard, Pt.2 by Jim Rowe
  9. Project: SMS Controller Add-Ons by Peter Smith
  10. Vintage Radio: The mysterious Monarch D671/32 from Astor by Rodney Champness
  11. Salvage It: A $5 variable voltage power supply by Julian Edgar
  12. Back Issues
  13. Advertising Index
  14. Outer Back Cover

This is only a preview of the April 2005 issue of Silicon Chip.

You can view 35 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 "Build A MIDI Theremin, Pt.1":
  • PIC16F88 firmware and accompanying software for the MIDI Theremin (Free)
  • PCB Patterns for the MIDI Theremin (PDF download) [01204051/2] (Free)
  • MIDI Theremin front panel artwork (PDF download) (Free)
Articles in this series:
  • Build A MIDI Theremin, Pt.1 (April 2005)
  • Build A MIDI Theremin, Pt.1 (April 2005)
  • MIDI Theremin, Pt II (May 2005)
  • MIDI Theremin, Pt II (May 2005)
Articles in this series:
  • The Start Of Colour TV In Australia, Pt.1 (March 2005)
  • The Start Of Colour TV In Australia, Pt.1 (March 2005)
  • The Start Of Colour TV In Australia, Pt.2 (April 2005)
  • The Start Of Colour TV In Australia, Pt.2 (April 2005)
Items relevant to "Bass Extender For Hifi Systems":
  • Bass Extender PCB pattern (PDF download) [01104051] (Free)
  • BASS Extender front panel artwork (PDF download) (Free)
Articles in this series:
  • Build A Professional Sports Scoreboard, Pt.1 (March 2005)
  • Build A Professional Sports Scoreboard, Pt.1 (March 2005)
  • Build A Professional Sports Scoreboard, Pt.2 (April 2005)
  • Build A Professional Sports Scoreboard, Pt.2 (April 2005)
  • Pro Scoreboard, Pt III (May 2005)
  • Pro Scoreboard, Pt III (May 2005)

Purchase a printed copy of this issue for $10.00.

SILICON CHIP www.siliconchip.com.au Publisher & Editor-in-Chief Leo Simpson, B.Bus., FAICD Production Manager Greg Swain, B.Sc.(Hons.) Technical Editor Peter Smith Technical Staff John Clarke, B.E.(Elec.) Ross Tester Jim Rowe, B.A., B.Sc, VK2ZLO Reader Services Ann Jenkinson Advertising Enquiries Lawrence Smith Benedictus Smith Pty Ltd Phone (02) 9211 8035 Fax: (02) 9211 0068 lawrence<at>benedictus-smith.com Publisher’s Letter Reader feedback is welcome This month, as in all months, we have some very good letters from readers, on a diverse range of topics. As you will see in the Mailbag pages starting on page 4, some are very complimentary and others, well . . . you can see for yourself. In particular, my answer to David Millist last month on the topic of current transformers brought forth a torrent of letters, both by email and by post. David Millist can take a bow because all the letters rushed to his defence. I must admit to being taken aback by the vehemence of some of the letters – we have only included a selection – and I thought “Oh dear, what have we unleashed this time?” As I went through the letters and talked to a few older readers, I realised that in stating that we failed to see how a current transformer can generate lethal voltages, I had completely overlooked the common type of current transformers widely used in power distribution systems. If an open-circuit occurs in the secondary winding, such transformers can be very dangerous indeed. Regular Contributors Brendan Akhurst Rodney Champness, VK3UG Julian Edgar, Dip.T.(Sec.), B.Ed, Grad.Dip.Jnl Mike Sheriff, B.Sc, VK2YFK Stan Swan And of course, after we ran a few current monitoring lashups, I had to admit an error in the operation of toroids. Expletive deleted. SILICON CHIP is published 12 times a year by Silicon Chip Publications Pty Ltd. ACN 003 205 490. ABN 49 003 205 490 All material copyright ©. No part of this publication may be reproduced without the written consent of the publisher. I particularly like the fact that so many readers comment on the answers in “Ask SILICON CHIP”. Readers enjoy most sections of the magazine, but “Ask SILICON CHIP” consistently generates far more correspondence than any other section, both in questions asked and comments on the resulting answers. Printing: Hannanprint, Noble Park, Victoria. Distribution: Network Distribution Company. Subscription rates: $83.00 per year in Australia. For overseas rates, see the subscription page in this issue. Editorial office: Unit 8, 101 Darley St, Mona Vale, NSW 2103. Postal address: PO Box 139, Collaroy Beach, NSW 2097. Phone (02) 9979 5644. Fax (02) 9979 6503. E-mail: silchip<at>siliconchip.com.au On reflection, I realise that such rapid feedback from readers, immediately after an issue has gone on sale, is a good thing. Many thousands of readers take SILICON CHIP very seriously indeed and are anxious that we continue to maintain a high standard. We like getting the compliments and therefore we must also accept the criticisms when they come. We have always known that our readers are vigilant, which is why I hate it when errors do appear in the magazine. That is one of the drawbacks of a print magazine – when an error occurs, it is there for all time. We can and do publish Notes & Errata but the error still remains on the printed pages. An on-line publication is different; if an error occurs, you can do a quick up-load and presto, it might never have happened. But our long-term destiny appears to be with the print magazine. While the on-line version of SILICON CHIP is popular with many people, the vast majority appear to favour the printed edition. It is so much easier to read, to digest and refer back to, and to spot those loathsome errors! Leo Simpson ISSN 1030-2662 * Recommended and maximum price only. 2  Silicon Chip siliconchip.com.au