Silicon ChipMarket Centre - February 1994 SILICON CHIP
  1. Outer Front Cover
  2. Contents
  3. Publisher's Letter: Energy consumption taking the long view
  4. Feature: Airbags: More Than Just Bags Of Wind by Julian Edgar
  5. Book Store
  6. Feature: Data On The ISD2590P Voice Recorder IC by Darren Yates
  7. Project: Build A 90-Second Message Recorder by Darren Yates
  8. Feature: Instrumentation Programming The Graphical Way by Jack Barber
  9. Project: Compact & Efficient 12-240VAC 200W Inverter by John Clarke
  10. Feature: Electronic Engine Management; Pt.5 by Julian Edgar
  11. Project: A Single Chip Audio Amplifier by Darren Yates
  12. Serviceman's Log: If only the fault would show by The TV Serviceman
  13. Feature: Amateur Radio by Garry Cratt, VK2YBX
  14. Project: Build A Novel LED Torch by John Clarke
  15. Order Form
  16. Project: 40V 3A Variable Power Supply; Pt.2 by John Clarke
  17. Feature: Computer Bits by Darren Yates
  18. Vintage Radio: Building a simple 1-valve receiver by John Hill
  19. Product Showcase
  20. Back Issues
  21. Market Centre
  22. Advertising Index
  23. Outer Back Cover

This is only a preview of the February 1994 issue of Silicon Chip.

You can view 30 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.

Items relevant to "Build A 90-Second Message Recorder":
  • 90 Second Message Recorder PCB pattern (PDF download) [01202941] (Free)
Items relevant to "Compact & Efficient 12-240VAC 200W Inverter":
  • 200W 12V DC to 240VAC Inverter PCB pattern (PDF download) [11309931] (Free)
Articles in this series:
  • Electronic Engine Management; Pt.1 (October 1993)
  • Electronic Engine Management; Pt.2 (November 1993)
  • Electronic Engine Management; Pt.3 (December 1993)
  • Electronic Engine Management; Pt.4 (January 1994)
  • Electronic Engine Management; Pt.5 (February 1994)
  • Electronic Engine Management; Pt.6 (March 1994)
  • Electronic Engine Management; Pt.7 (April 1994)
  • Electronic Engine Management; Pt.8 (May 1994)
  • Electronic Engine Management; Pt.9 (June 1994)
  • Electronic Engine Management; Pt.10 (July 1994)
  • Electronic Engine Management; Pt.11 (August 1994)
  • Electronic Engine Management; Pt.12 (September 1994)
  • Electronic Engine Management; Pt.13 (October 1994)
Items relevant to "A Single Chip Audio Amplifier":
  • Champ: Single Chip Audio Amplifier PCB [01102941] (AUD $5.00)
  • The Champ PCB pattern (PDF download) [01102941] (Free)
Articles in this series:
  • Amateur Radio (November 1987)
  • Amateur Radio (December 1987)
  • Amateur Radio (February 1988)
  • Amateur Radio (March 1988)
  • Amateur Radio (April 1988)
  • Amateur Radio (May 1988)
  • Amateur Radio (June 1988)
  • Amateur Radio (July 1988)
  • Amateur Radio (August 1988)
  • Amateur Radio (September 1988)
  • Amateur Radio (October 1988)
  • Amateur Radio (November 1988)
  • Amateur Radio (December 1988)
  • Amateur Radio (January 1989)
  • Amateur Radio (April 1989)
  • Amateur Radio (May 1989)
  • Amateur Radio (June 1989)
  • Amateur Radio (July 1989)
  • Amateur Radio (August 1989)
  • Amateur Radio (September 1989)
  • Amateur Radio (October 1989)
  • Amateur Radio (November 1989)
  • Amateur Radio (December 1989)
  • Amateur Radio (February 1990)
  • Amateur Radio (March 1990)
  • Amateur Radio (April 1990)
  • Amateur Radio (May 1990)
  • Amateur Radio (June 1990)
  • Amateur Radio (July 1990)
  • The "Tube" vs. The Microchip (August 1990)
  • Amateur Radio (September 1990)
  • Amateur Radio (October 1990)
  • Amateur Radio (November 1990)
  • Amateur Radio (December 1990)
  • Amateur Radio (January 1991)
  • Amateur Radio (February 1991)
  • Amateur Radio (March 1991)
  • Amateur Radio (April 1991)
  • Amateur Radio (May 1991)
  • Amateur Radio (June 1991)
  • Amateur Radio (July 1991)
  • Amateur Radio (August 1991)
  • Amateur Radio (September 1991)
  • Amateur Radio (October 1991)
  • Amateur Radio (November 1991)
  • Amateur Radio (January 1992)
  • Amateur Radio (February 1992)
  • Amateur Radio (March 1992)
  • Amateur Radio (July 1992)
  • Amateur Radio (August 1992)
  • Amateur Radio (September 1992)
  • Amateur Radio (October 1992)
  • Amateur Radio (November 1992)
  • Amateur Radio (January 1993)
  • Amateur Radio (March 1993)
  • Amateur Radio (May 1993)
  • Amateur Radio (June 1993)
  • Amateur Radio (July 1993)
  • Amateur Radio (August 1993)
  • Amateur Radio (September 1993)
  • Amateur Radio (October 1993)
  • Amateur Radio (December 1993)
  • Amateur Radio (February 1994)
  • Amateur Radio (March 1994)
  • Amateur Radio (May 1994)
  • Amateur Radio (June 1994)
  • Amateur Radio (September 1994)
  • Amateur Radio (December 1994)
  • Amateur Radio (January 1995)
  • CB Radio Can Now Transmit Data (March 2001)
  • What's On Offer In "Walkie Talkies" (March 2001)
  • Stressless Wireless (October 2004)
  • “Degen” Synthesised HF Communications Receiver (January 2007)
  • WiNRADiO: Marrying A Radio Receiver To A PC (January 2007)
  • PICAXE-08M 433MHz Data Transceiver (October 2008)
  • Half-Duplex With HopeRF’s HM-TR UHF Transceivers (April 2009)
  • Dorji 433MHz Wireless Data Modules (January 2012)
Items relevant to "Build A Novel LED Torch":
  • Simple LED Torch PCB pattern (PDF download) [08302941] (Free)
Items relevant to "40V 3A Variable Power Supply; Pt.2":
  • Silicon Chip article scan, February 1994 - 40V 3A Variable Power Supply, Pt.2 (AUD $10.00)
  • Silicon Chip article scan, January 1994 - 40V 3A Variable Power Supply, Pt.1 (AUD $10.00)
  • 40V 3A Variable Power Supply PCB pattern (PDF download) [04202941] (Free)
  • Silicon Chip article scan, February 1994 - 40V 3A Variable Power Supply, Pt.2 (AUD $10.00)
Articles in this series:
  • 40V 3A Variable Power Supply; Pt.1 (January 1994)
  • 40V 3A Variable Power Supply; Pt.2 (February 1994)
Items relevant to "Computer Bits":
  • Games Card Breakout PCB [07103941] (PCB Pattern, Free)
  • DOS software for Computer Bits, November 1993 & January/February 1994 (Free)
Articles in this series:
  • Experiments For Your Games Card (January 1992)
  • Computer Bits (November 1993)
  • Computer Bits (January 1994)
  • Computer Bits (February 1994)
  • Computer Bits (April 1994)
MARKET CENTRE Cash in your surplus gear. Advertise it here in Silicon Chip. ANTIQUE RADIO CLASSIFIED ADVERTISING RATES Advertising rates for this page: Classified ads: $10.00 for up to 12 words plus 50 cents for each additional word. Display ads (casual rate): $20 per column centimetre (Max. 10cm). Closing date: five weeks prior to month of sale. To run your classified ad, print it clearly in the space below or on a separate sheet of paper, fill out the form & send it with your cheque or credit card details to: Silicon Chip Classifieds, PO Box 139, Collaroy, NSW 2097. Or fax the details to (02) 979 6503. _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ ANTIQUE RADIO RESTORATIONS: specialist restoration service provided for vintage radios, test equipment & sales. Service includes chassis rewiring, recon­ densering, valve testing & mechanical re­­furbishment. Rejuvenation of wooden, bakelite & metal cabinets. Plenty of parts – require details for mail order. About 1200 radios within 16,000 square feet. Two-year warranty on full restoration. Open on Saturday 10am-4.30pm; Sunday 12.30-4.30pm. 109 Cann St, Bass Hill, NSW 2197 Phone (02) 645 3173 BH or (02) 726 1613 AH. FOR SALE _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ THE HOMEBUILT DYNAMO: (plans) brushless, 1000 DC watt at 740 revs. $A85 postpaid airmail from Al Forbes, PO Box 3919 - SC, Auckland, NZ. Phone Auckland (09) 818 8967 any time. Rotor magnets (3700 gauss) kit now available. WEATHER FAX programs for IBM XT/ATs *** “RADFAX2” $35 is a high resolution, shortwave weather fax, Morse & RTTY receiving program. Suitable for CGA, EGA, VGA and Hercules cards (state which). Needs SSB HF radio & Radfax decoder. *** “SATFAX” $45 is a NOAA, Meteor & GMS weather satellite picture receiving program. Needs EGA or VGA plus “WEATHER FAX” PC card. *** “MAXISAT” $75 is similar to SATFAX but needs 2Mb expanded memory (EMS 3.6 or 4.0) ❏ Bankcard   ❏ Visa Card   ❏ Master Card Card No. ✂ Enclosed is my cheque/money order for $­__________ or please debit my RCS RADIO PTY LTD Signature­­­­­­­­­­­­__________________________ Card expiry date______/______ Name ______________________________________________________ Street ______________________________________________________ Suburb/town ___________________________ Postcode______________ RCS Radio Pty Ltd is the only company that manufactures and sells every PC board and front panel published in SILICON CHIP, ETI and EA. RCS Radio Pty Ltd, 651 Forest Rd, Bexley 2207. Phone (02) 587 3491 February 1994  95 TRANSFORMER REWINDS ALL TYPES OF TRANSFORMER REWINDS TRANSFORMER REWINDS Reply Paid No.2, PO Box 438, Singleton, NSW 2330. Ph: (065) 76 1291. Fax: (065) 76 1003. and 1024 x 768 SVGA card. All programs are on 5.25-inch or 3.5-inch disks (state which) & include documentation. Add $3 postage. Only from M. Delahunty, 42 Villiers St, New Farm, Qld 4005. Phone (07) 358 2785. PAY TV & SATELLITE Scrambling News Monthly, with the latest on de­scrambling techniques & addresses, where to buy the latest descramblers. Send stamp for info. John Papp, Box 37885 Winnellie, NT 0821. PRINTED CIRCUIT BOARDS for the hobbyist. For service & enquiries contact: T. A. Mowles (08) 326 5590. SUBSTITUTE FOR A HANDFUL OF ICs: Parallax “BASIC STAMP”. A gen­er­al purpose small circuit module, it is really a 25 x 50mm board with a computer chip (4MHz PIC 16C56), EEPROM, 8 I/O pins, board space includes prototyping area. Program it on a PC (only 33 instructions) with development kit which includes one “BASIC STAMP” ($249 plus S/T & post), extra modules ($66 plus S/T & post). Send 45c stamp for more information. Parallax distributor and techni­cal support in Australia: MicroZed Computers, PO Box 634, Armi­dale, NSW 2350. Facsimile (067) 72 8987. MICASOFT Electronics and Computing tutor program, written in UK, ideal for TAFE, schools, or individual use. Now available in Australia. Send $1.80 in stamps for demo disk (tell us what size). MicroZed Computers, PO Box 634, Armidale 2350. 68705 MICRO EMULATOR!!!: Yes! A fair dinkum 68705 hardware ICE for $285 (B&T $330). Run programs in RAM, builtin disassembler, single step, break points, the works! It even emulates 2716, 2732 and 2764 EPROMs. Can be used with 96  Silicon Chip MEMORY & DRIVES PRICES AT DECEMBER 1ST, 1993 SIMM 1Mb x 3 70ns 1Mb x 9 70ns 4Mb (72-pin) 4Mb x 9 70ns 4Mb x 8 80ns $63 $68 $265 $235 $210 DRAM DIP 1 x 1Mb 256 x 4 1Mb x 4 70ns 70ns Z $8 $8 $35 IBM PS.2 50/55/70 70/35 90/95 2Mb 4Mb 4Mb $136 $265 $265 MAC 2Mb SI & LC 4Mb P’Book $135 $320 CO-PROCESSORS 387SX to 25 387DX to 33 $105 $105 LASER PRINTER HP with 4Mb $260 TOSHIBA T3200SX T44/6400 T5200 4Mb 4Mb 8Mb $360 $340 $680 SUN SPARC 10/20 16Mb $920 DRIVES SEAG 130Mb 16ms $290 SEAG 452Mb 12ms $720 SEAG 1.05GB 10ms $1660 Sales tax 21%. Overnight delivery. Credit cards welcome. Ring for Latest Prices 1st Floor, 100 Yarrara Rd, PO Box 382, Pennant Hills, 2120. Tel: (02) 980 6988 Fax: (02) 980 6991 PELHAM ICL 286 Board Kits All in one board with two serial, printer, IBM keyboard, high density floppy & IDE mono video interface. Up to 4Mb RAM, 80286-16cpu, MS-DOS compatible, 130 page manual, small size 170mm x 255mm. Max I/O kit for PCs, 7 relays, ADC, DAC, stepper driver, TTL inputs, with software $169 PC I/O card with 8255 chip 24 I/O lines programmable as inputs or outputs $69 1.5 watt AM broadcast transmitter XTAL locked $49 2.5 watt FM broadcast transmitter 88-108MHz. $49 Digi-125 audio power amp (over 19,000 sold since 1987) 50 watt/8 $14 125 watt/4 $19 New 200 watt/2 version $29 Infrared relay kit $9 Remote control tester $4 $299 Ampo little PC All in one NEC V40 CPU board, MS-DOS compatible, high density floppy. SCSI hard disk, 2 serial, printer, solid state hard disk, IBM keyboard interface, (4W), CMOS single +5V rail, up to 768Kb RAM, 384Kb ROM, 145mm x 250mm, 98page manual. $299 P.C. Computers 36 Regent St, Kensington, SA. Phone (08) 332 6513. a PC, MAC etc. Optional 687053/U/R ($115) and C4/C8 ($95) programmers for direct connec­tion to 68705 emulator. Kits and further information from Graham Blowes, Mantis Micro Products, 38 Garnet St, Niddrie 3042. Phone (03) 337 1917(ah), (03) 575 3349(bh), fax (03) 575 3369. A TRUE AUSSIE Z80 Development System driven from MS-DOS LPT1. EPROM is emulated during development. PCB and disk full of Source Code, Z8T XASM, Z8TBasic and full circuits. $38. With EPROM $52. Promo disk $2. Don McKenzie, 29 Ellesmere Crescent, Tullamarine 3043. Phone (03) 338 6286. UNUSUAL BOOKS: Electronic Devices, Fireworks, Locksmithing, Radar Invisibility, Surveillance, Self-Protection, Unusual Chem­istry and more. For a complete catalog, send 95 cents in stamps to Vector Press, Dept S, PO Box 434, Brighton, SA 5048. Advertising Index All Electronic Components............8 Altronics ................................ 48-49 Antique Radio Restorations.........95 A-One Electronics........................55 Av-Comm.....................................43 Contan Audio...............................11 David Reid Electronics ..............69 Dick Smith Electronics........... 12-15 Electronic Fault Info.....................19 Emtronics.....................................45 Harbuch Electronics....................69 Instant PCBs................................96 Jaycar ........................ 33-36, 61-64 Macservice....................................3 National Instruments...................25 PC Computers.............................96 Pelham........................................96 Peter C. Lacey Services..............50 Philips Test & Measurement......IBC RCS Radio ..................................95 Resurrection Radio......................85 Rockby Electronics......................60 Rod Irving Electronics .......... 74-78 Silicon Chip Back Issues....... 90-91 Silicon Chip Binders..............80, 85 Silicon Chip Book Club..................9 Tektronix..................................OBC Transformer Rewinds...................96 Wombat Electronics.....................11 Yokogawa..................................IFC FLUORESCENT INVERTER KIT (SC Feb 91) 12V or 24V/5W-21W. 48V version on request. Secondary wind, board plus components $30.00 plus p&p $4.00. Fluorescent inverter kit (SC Nov 93) 12V/24V/48V, 18W and 38W P.O.A. Solar battery charging regulator, short form kit, 12V or 24V (series) (SC Jan 94), employs Mosfet to switch solar array, max current 10A $54.00 plus p&p $4.00. Additional Mosfet $8.00 and Schottky diode $5.00 to make 20A regulator. Cheques and postal money orders accepted with mail orders. Send orders to Otakar Priboj, PO Box 362, Villawood, NSW 2163, Australia. Phone (02) 724 3801 (Otto).