Silicon ChipMarket Centre - July 1990 SILICON CHIP
  1. Outer Front Cover
  2. Contents
  3. Publisher's Letter: The story of electrical energy
  4. Vintage Radio: How to solve unusual problems by John Hill
  5. Review: AR950 100-Channel Scanner by Garry Cratt
  6. Project: Digital Sine/Square Wave Generator; Pt.1 by John Clarke
  7. Project: Alarm Keypad & Combination Lock by Greg Swain
  8. Project: Build An Elegant Electronic Die by Darren Yates
  9. Serviceman's Log: The dangers of a quick fix by The TV Serviceman
  10. Back Issues
  11. Feature: The Story Of Electrical Energy by Bryan Maher
  12. Feature: Waveform Generation Using A PC, Pt.4 by Steve Payor
  13. Feature: Computer Bits by Jennifer Bonnitcha
  14. Project: Low Cost Dual Power Supply by John Crichton
  15. Feature: Amateur Radio by Garry Cratt, VK2YBX
  16. Market Centre
  17. Advertising Index
  18. Subscriptions
  19. Outer Back Cover

This is only a preview of the July 1990 issue of Silicon Chip.

You can view 49 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 "Digital Sine/Square Wave Generator; Pt.1":
  • Digital Sine/Square Wave Generator PCB patterns [04108901/2] (Free)
  • Silicon Chip article scan, July 1990 - Digital Sine/Square Wave Generator; Pt.1 (AUD $10.00)
Articles in this series:
  • Digital Sine/Square Wave Generator; Pt.1 (July 1990)
  • Digital Sine/Square Wave Generator; Pt.2 (August 1990)
Articles in this series:
  • The Technology Letters, Pt.2 (January 1989)
  • The Story Of Electrical Energy (July 1990)
  • The Story Of Electrical Energy; Pt.2 (August 1990)
  • The Story Of Electrical Energy; Pt.3 (September 1990)
  • The Story Of Electrical Energy; Pt.4 (October 1990)
  • The Story Of Electrical Energy; Pt.5 (November 1990)
  • The Story Of Electrical Energy; Pt.6 (December 1990)
  • The Story Of Electrical Energy; Pt.7 (January 1991)
  • The Story Of Electrical Energy; Pt.8 (February 1991)
  • The Story Of Electrical Energy; Pt.9 (March 1991)
  • The Story Of Electrical Energy; Pt.10 (May 1991)
  • The Story Of Electrical Energy; Pt.11 (July 1991)
  • The Story Of Electrical Energy; Pt.12 (August 1991)
  • The Story Of Electrical Energy; Pt.13 (September 1991)
  • The Story Of Electrical Energy; Pt.14 (October 1991)
  • The Story Of Electrical Energy; Pt.15 (November 1991)
  • The Story Of Electrical Energy; Pt.16 (December 1991)
  • The Story Of Electrical Energy; Pt.17 (January 1992)
  • The Story Of Electrical Energy; Pt.18 (March 1992)
  • The Story Of Electrical Energy; Pt.19 (August 1992)
  • The Story of Electrical Energy; Pt.20 (September 1992)
  • The Story Of Electrical Energy; Pt.21 (November 1992)
  • The Story Of Electrical Energy; Pt.22 (January 1993)
  • The Story of Electrical Energy (April 1993)
  • The Story Of Electrical Energy; Pt.24 (May 1993)
  • The Story Of Electrical Energy; Pt.24 (June 1993)
Articles in this series:
  • Computer Bits (February 1990)
  • Computer Bits (March 1990)
  • Waveform Generation Using A PC, Pt.3 (May 1990)
  • Waveform Generation Using A PC, Pt.4 (July 1990)
Articles in this series:
  • Computer Bits (May 1990)
  • Computer Bits (June 1990)
  • Computer Bits (July 1990)
  • Computer Bits (August 1990)
  • Computer Bits (September 1990)
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)
T CEN·1· Cash in your surplus gear. Advertise it here in Silicon Chip. Advertising rates for this page: Classified ads - $7.00 for up to 15 words plus 40 cents for each additional word; Display ads (casual rate) - $20 per column centimetre (max. 10cm). Closing date: five weeks prior to month of sale. If you use a PO Box number, you must include your permanent address and phone number for our files. We cannot accept ads submitted without this information. To run your own classified ad, put or.e word on each of the lines below and send this form with your payment to: Silicon Chip Classifieds, PO Box 139, Collaroy Beach, NSW 2097. MEMORY IC's & SIMM's From Japans Largest Manufacturer of Computers the Quality you expect.. SIMM MODULES 1 Mb X 9 80ns $115.00 DRAM 1 Mb X 1 80ns $10.50 80ns $10.50 PLEASE PRINT EACH WORD SEPARATELY, IN BLOCK LETTERS DRAM 256K X 4 2 3 4 5 6 7 8 9 10 11 12 13 14 15 ($7.00) • Add 20.~: Sales Tax/ SS.00 P & P PACIFIC MICROELECTRONICS PTY. LTD. 'CENTRAL PARK' UNIT A20, 4 CENTRAL AVENUE, THORNLEIGH N.S.W. 2120 PHONE : 02 481 0065 FAX : 02 484 4460 o) Name FUJITSU Street Postcode Suburb/Town .. or please debit my Enclosed is my c neque or money order for $ D Bankcard Card No D Visa Card D MEMORY CHIPS MasterCard Prices at May 1 st, 1990 I~~-~~~~-~-~~~~~~~-~~~~ Signature .. Card expiry date ...... ./ ..... .. . Speed Chip type SIMMS (MACS) (IBM) SIPPS DIP FOR SALE WEATHER FAX programs for IBM XT/ATs * * * "RADFAX2" is a high resolution, shortwave weather fax, Morse & RTTY receiving program. Needs CGA, SSB HF radio & Radfax decoder . Also "RF2HERC", "RF2EGA" & "RF2VGA" , same as RADFAX2 but suitable for Hercules, EGA & VGA cards respectively. $35. * * * "SATFAX" is a NOAA, Meteor & GMS weather satellite picture receiving program. Uses EGA & VGA modes, FIX-A-KIT $20 PER HOUR LABOUR NO CHARGE FOR KITS THAT CAN ' T BE REPAIRED 3 MONTHS WARRANTY ON REPAIRS CONSTRUCTION AVAILABLE HYCAL INSTRUMENTS DESIGN, MANUFACTURE, REPAIR OF ELECTRONIC EQUIPMENT (02) 633 5897 needs EGA or VGA colour monitor & card, plus "WEATHER FAX" PC card. $45. * * * All programs are on 5 .25-inch or 3.5-inch discs (state which) & include documentation. Add $3 postage. ONLY from M. Delahunty, 42 Villiers St, New Farm, Old 4005. Phone (07) 358 2785 . ZIP 9 X 256 9 x 1Mb 8 x 1Mb 9x1MbPS2 9 X 256 9 x 1Mb 411000 414256 41256 41464(256) 4164 414256 (1 Mb) 41256 411000 (1Mb) 4400 (4Mbl Sales Tax 20¾ 12Dns 100ns 80ns Prices (excluding tax) 30.00 34.00 36.00 116.00 120.00 108.00 112.00 165.00 38.00 40.00 112.00 116.00 10.80 11 .40 11 .80 10.80 11 .80 12.20 2.85 3.40 3.95 3.40 3.95 2.70 3.00 13.50 15.00 4.40 12.80 13.20 98.00 Overnight delivery Credit cards welcome DISCOUNTS FOR DEALERS Phone for pricing on ?Ons, 60ns, Toshiba. Compaq & Laser Printer PELHAM Tel (02) 427 0011 - Fax (02) 418 6831 DIGIT Al WAVEFORM GENERATION: as described in SILICON CHIP in March, May, June & July 1990. PC board and software to generate waveforms . Both for only $39.95 including p&p. Instructions included. PC Board $16.00, Software $32.50 including postage. Send cheque or money order to M. Radvanyi, PO Box 49, Kingswood, NSW, 2750. AUDIO TV VIDEO repair business for sale . $40,000 . Phone (02) 664 1804. VCR MAINTENANCE supplies. This month's special - video belt kits only $9.50; professional chamois head cleaning tools & cleaning fluid $ 7. 50; quality head cleaning cassettes $13.00. Send SSAE for full catalog. We accept Bankcard & Mastercard. To order, please supply VCR brand & model number, item quantities, name & address, plus credit card details. Please include $3.00 for post & packing. Makrun Computer Technology, PO Box 458 , Merrylands 2160. WHOOPS! MY 280-BASED PBUFF printer buffer just doubled its memory capacity again. Over 3000 kits now sold. Combinations of DIP/SIPP/SIMM DRAMs in 9 memory sizes up to 2Mb. Rev J board, Ver 4 .2 EPROM and in]UL Y 1990 103 r~--------------------, SILICON CHIP BINDERS Yes 1 Please send me _ ___ SILICON CHIP binder(s) at $A 11.95 plus $A3 p&p each {NZ p&p $A6). Name _ _ __ _ _ _ __ _ __ _ _ __ _ _ _ _ _ _ _ __ (PLEASE PRINT) Street_ _ __ __ _ __ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __ Suburb/town _ _ _ __ _ _ _ __ _ __ Postcode _ _ _ _ __ Enclosed is my cheque /money order for $ _ _ _ _ or please debit my ~ I Bankcard I J Visa Card [ J MasterCard Signature _ _ ___________ Card expiry date_~-- L-----------------------J structions $39. Cable board $9. P&P $3. Serial board and many other options available. Send a 41 c stamp for a free catalog to: Don McKenzie, 29 Ellesmere Crescent, Tullamarine 3043 . brand & model number & $12 .00 for · each kit required . Prompt dispatch assured. James Cotterill, PO Box 44, Farrer, ACT 2607. 60W Valve-1 $99, 200W Valve-2 $199, Audio Toolkit Tool-1 $69, FET-1 super quality stereo preamp $20, Bass & Treble $23. ROBOTICS: experimenter's kit. Includes IBM-PC controller, PSU, stepper motor, manual, software $99. Digital voice recorder TMS-334 7 chips $25. PC Computers, 36 Regent St, Kensington, SA. Phone (08) 332 6513. PROJECT PCBs: ETI-DIGI 125 audio amp $9/pair, ETl-1623 IBM PIA card $39.95, 6502/Z80/6809 miniprocessor $49 . PRE-BUILT AUDIO AMPS: 3 .5W LM380 $20, LM1875 $30, 150W IC-150 $99, 300W IC-300 $179, SMARTWORK POST-PROCESSOR: if you own a HP7475 or compatible flat bed plotter you can plot your own PCBs direct on blank board ready to etch. PP plots 1: 1 and mirror image. Only $99 . PC Computers (08) 332 6513 . BOOKS LOGIC ANALYSER. Gould Instruments BELT KITS FOR VCRs. Please supply Electronic Kit Constructor's Manual Everything you need to know to make your electronic kit constructing successful and satisfying ... • Preparing your workplace• Tools required • Component recognition, descriptions and codes • Reading circu it diagrams• How to solder and fix solde ring problems• Assembly hints• Troubleshooting tec hniques• Technical terms and definitions. 36 pages The best there is, ONLY $4.9S Digital Voice Recorder Board Silicon Chip December 1991 Complete. fully detailed. step-by-step assembly instruct ions with nearly 100 diagrams and installation illustrations. World standard instructions similar to Schlumberger/Heathkit books. 40 pages Top Quality $9.9S MOTORISTS - Trouble-shooting Guide Let Mick Annick and his mate Alec Auto help you get back on the road when your motorists' service is not available. Bright, easy-to-read and understand with all original drawings. Convenient size to fit your glovebox. 30 pages ONLY $3.9Sea S up $3.00ea Plus $2.50 P&P for all orders. Send your cheque or money order to: Nolan Project Services Pty Ltd K40 stand alone analyser. Eight nonvolatile memories, 7-inch CRT, 4 x 2K sample memories, 2 x 16-channel, probes up to 1 00MHz, asynchronous capture. Weighs 7.7kg. $975.00. Import Technologies (07) 372 5138. PB0 PORT ABLE battery rechargeable 80-column printer. Serial interface. Very compact & light. 1.1 kg. Uses normal or thermal paper. $1 7 5. Import Technologies (07) 372 5138. EPSON TOSHIBA LCD SCREEN. Originally to suit T1500 desktop. 240 x 180mm, 640 x 200 pixels. Uses 5V supply & TTL drive signals. Suit experimenter. $150 . Import Technologies (07) 372 5138. PO Box 681 North Sydney NSW 2059 All books are publlshed by Nolan Project Services Pty Ltd, 148 Wycombe Road Neutral Bay NSW 2089 Deafer enquiries welcome - wholesale prices. Phone (02) 953 0810 104 SILICON CHIP TOSHIBA T3100 CO-PROCESSOR kit. This piggy-pack board enables the fitting of a 80287-8 to the early T3100. Advertising Index Altronics ........................ 46-49 Arista .... ...... .... .. ................. 69 Aust-Tek Electronics .......... .. 82 Automatic Alarms ........ ...... ... 31 Board Solutions .... ...... ... . 62,63 David Reid Electronics ..... .. .. . 59 Dick Smith Electronics .... . 1 0-1 5 Electronic Solutions ........ 76 , 77 Elmeasco .... .. ................ 31,82 Geoff Wood Electronics ... ..... 44 Harbuch Electronics .... ......... 43 Hycal Instruments .............. 1 03 Jaycar Electronics .......... 24-27 84-87 Jiloa ..... ..... ... .. .... ..... .... .... ..... 5 J.V. Tuners ......................... 43 Pacific Microelectronics ...... 1 03 PC Marketplace .... ............ .. IFC Pelham ...... ........... ............ 103 RCS Radio ...... .. ......... ......... 96 Resurrection Radio ...... ... ....... 5 Rod Irving Electronics ..... 38,39 70,71,92,93 Silicon Chip Binders .... 75,0BC Subscriptions .. .. .. ............ .. IBC Westinghouse ...................... 9 PC Boards Printed circuit boards for SILICON CHIP projects are made by: • Electronic Toy Services, 2/ 111 Glynville Drive, Hackham West, SA 5163. Phone (08) 382 8919. • Jemal Products, 5 Forge St, Welshpool, WA 6106. Phone (09) 350 5555. • Marday Services, PO Box 19-189, Avondale, Auckland, NZ. Phone 88 5730. • RCS Radio Pty Ltd, 651 Forest Rd, Bexley, NSW 2207 . Phone (02) 587 3491. Two types available, solder in & plug in. Solder version $190.00. Plug-in version $335.00. Import Technologies (07) 372 5138. WANTED EARLY ISSUES OF SILICON CHIP wanted. Must be in good condition. November 1987, December 1987 & January 1988 only. Up to $10.00 per issue if in mint condition. Phone Terry (08) 382 8919.