Silicon ChipMarket Centre - July 1993 SILICON CHIP
  1. Outer Front Cover
  2. Contents
  3. Publisher's Letter: Old textbooks & data books are valuable
  4. Feature: The Keck Optical Telescope Pt.1 by Bob Symes
  5. Order Form
  6. Review: Tektronix TDS 320 100MHz Digital Scope by Leo Simpson
  7. Feature: Programming The Motorola 68HC705C8 by Barry Rozema
  8. Feature: Data: The ISD1016 Voice Recorder IC by Darren Yates
  9. Subscriptions
  10. Project: Build A Single Chip Message Recorder by Darren Yates
  11. Project: Light Beam Relay Extender by Darren Yates
  12. Serviceman's Log: When it looks easy, it often ain't by The TV Serviceman
  13. Project: Build An AM Radio Trainer; Pt.2 by Marque Crozman & Leo Simpson
  14. Project: Windows-Based Digital Logic Analyser; Pt.2 by Jussi Jumppanen
  15. Product Showcase
  16. Project: A Low-Cost Quiz Game Adjudicator by Darren Yates
  17. Feature: Remote Control by Bob Young
  18. Feature: Amateur Radio by Garry Cratt, VK2YBX
  19. Vintage Radio: In the good ol' days of my childhood by John Hill
  20. Back Issues
  21. Notes & Errata: Nicad Cell Discharger, May 1993
  22. Market Centre
  23. Advertising Index
  24. Outer Back Cover: Nilsen Instruments

This is only a preview of the July 1993 issue of Silicon Chip.

You can view 37 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:
  • The Keck Optical Telescope Pt.1 (July 1993)
  • The Keck Optical Telescope; Pt.2 (August 1993)
Articles in this series:
  • Programming The Motorola 68HC705C8 (July 1993)
  • Programming the Motorola 68HC705C8 (October 1993)
  • Programming The 68HC705C8 Microcontroller (December 1993)
Items relevant to "Build A Single Chip Message Recorder":
  • Single-Chip Message Recorder PCB pattern (PDF download) [01104931] (Free)
Items relevant to "Light Beam Relay Extender":
  • Light Beam Relay Extender PCB pattern (PDF download) [03106931] (Free)
Items relevant to "Build An AM Radio Trainer; Pt.2":
  • Silicon Chip article scan, July 1993 - AM Radio Trainer Pt2 (AUD $10.00)
  • Silicon Chip article scan, June 1993 - AM Radio Trainer Pt1 (AUD $10.00)
  • AM Radio Trainer PCB Pattern [06107931] (Free)
  • Silicon Chip article scan, July 1993 - AM Radio Trainer Pt2 (AUD $10.00)
Articles in this series:
  • Build An AM Radio Trainer; Pt.1 (June 1993)
  • Build An AM Radio Trainer; Pt.2 (July 1993)
Articles in this series:
  • Windows-Based Digital Logic Analyser; Pt.1 (June 1993)
  • Some customers can be a real pain (June 1993)
  • Windows-Based Digital Logic Analyser; Pt.2 (July 1993)
Items relevant to "A Low-Cost Quiz Game Adjudicator":
  • Low-Cost Quiz Game Adjudicator PCB pattern (PDF download) [08106931] (Free)
Articles in this series:
  • Remote Control (May 1993)
  • Remote Control (June 1993)
  • Remote Control (July 1993)
  • Remote Control (August 1993)
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)
MARKET CENTRE Cash in your surplus gear. Advertise it here in Silicon Chip. ANTIQUE RADIO ANTIQUE RADIO RESTORATIONS: specialist restoration service provided for vintage radios, test equipment & sales. Service includes chassis rewiring, recondensering, 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 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 WEATHER FAX programs for IBM XT/ ATs *** “RADFAX2” $35 is a high resolution, shortwave 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) 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. $13.00 ea; 11-100 = $12.00 ea. P&P $2.00. Michael Zenere, 7 Hayfield Rd, My Waverley, Vic 3144. Phone (03) 803 1831. THE HOMEBUILT DYNAMO: (plans) brushless, 1000 watt at 740 revs. $A85 postpaid airmail from Al Forbes, PO Box 3919 - SC, Auckland, NZ. Phone Auckland (09) 818 8967 any time. 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, N.T. 0821. BURGLAR ALARM KIT: control panel (no case) $180.00; Remote Keypad $45.00; P&P $16.00. Michael Zenere, 7 Hayfield Rd, My Waverley, Vic 3144. Phone (03) 803 1831. SINGLE CHIP MICROCONTROLLER 68705P3S: 1.8K Eprom. 1-10 = 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 on a separate sheet of paper, fill out the form below & send both with your cheque or credit card details to: Silicon Chip Classifieds, PO Box 139, Collaroy Beach, NSW 2097. Or fax the details to (02) 979 6503. UNUSUAL BOOKS: electronic devices, fireworks, locksmithing, radar invisibility, surveillance, self-protection, unusual chemistry and more. For a complete catalog send 95c in stamps to: Vector Press, Dept S, PO Box 434, Brighton SA 5048. VINTAGE RADIO PARTS: numerous new and used valves, knobs and sundry parts. For price list, write to: Airwave Radio Restora­tion, PO Box 333, North Hobart, Tas. 7002. FAX DECODER for satellite and HF signals. Designed for JV FAX program offers superb picture resolution and zoom capability – PCB $29, kit $89; wideband VHF APT satellite receiver 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. ❏ 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 July 1993  95 COMPONENTS, COMPUTERS, ELECTRON TUBES SOME STOCK QTYS LIMITED ZSI IDE HARD DISKS RESISTORS ZM3140 125MB $399 MOST VALUES AVAIL. DOS 6 $95 1/4W M/FILM $3/100 2N3440 $1 1/3W CARBON $2/100 2SC2240 $0.60 1/2W CARBON $4/100 2SD571 $0.80 1W CARBON $5/100 MJE243 $0.80 2W CARBON $8/100 74122 $0.50 5W WIREWOUND $0.30 747DIL $0.50 10W RESISTORS $0.60 8250 $6     8251 $3      8259 $3     6809 $10 KEYTRONICS KB 327OPC KEYBOARDS $220.00 1620 $8 4042 $10 VALVES QQV07/50 $30 1B3GT $4 417A $8 ECF80 $6 182 $3 5651 $6 12AU7 $6 IT4 $6 5651A $6 12AU7A $7 CV553 $3 4-400A $80 12AU7WA $9 2C39A $50 5651WA $7 12AX7 $8 2C40A $40 5933S $30 12BY7A $10 5933WA $32 3A4 $8 12AV7 $4 6J6WA $7 3A5 $8 QB3/300 (C1108) $250 150C2 $2 ONE ONLY TBL12/38 TRANSMIT TUBE $2700 PHONE OR MAIL ORDERS, CREDIT CARDS ACCEPTED FOR ORDERS $20 & OVER, DISCOUNTS FOR QUANTITY ORDERS SECONTRONICS PO BOX 2215, BROOKSIDE, QLD 4053, PHONE (07) 355 1314 143 GRAYS RD, ENOGGERA, QLD 4051, FAX (07) 855 1014 SHOP OPEN SATURDAY 9AM - 4PM AH (07) 855 1880 MEMORY & DRIVES PRICES AT JUNE 1ST, 1993 SIMM 1Mb x 9 70ns 4Mb (72-pin) 4Mb x 9 70ns 4Mb x 8 80ns DRAM DIP 1 x 1Mb 256 x 4 41256 1Mb x 4 $59 $230 $225 $205 70ns $6.25 70ns $6.25 80ns $2.50 Z or D $26.00 DRIVES SEAG 42Mb SEAG 89Mb SEAG 107Mb SEAG 130Mb SEAG 214Mb 28ms 14ms 15ms 16ms 16ms $205 $292 $310 $335 $470 IBM PS.2 50/55/70 70/35 90/95 2Mb 4Mb 4Mb $145 $230 $230 TOSHIBA T3200SX T44/6400 T5200 T5200 4Mb 4Mb 2Mb 8Mb $300 $245 $150 $575 MAC 2Mb SI & LC 4Mb P’Book $104 $270 CO-PROCESSORS 387SX to 25 $110 387DX to 33 $110 Sales tax 20%. 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 EEM Electronics Printed circuit board assembly, switchmode power supplies repaired. Design work from start to finish. Ring anytime 9am-9pm Mon-Sun. (03) 4011393 PCB $19, kit $78 – includes $5 postage. Send cheque to Technocom, 187 McLarty Road, Halls Head, Mandurah 6210. Phone (09) 581 4297. ROMLoader EPROM Emulator (EA Jan/Feb 92) upgrade to handle 27128, 27256 EPROMs. Includes memory edit facility. 8051 Proto-Boards (EA Feb 93) also available. Send SAE for details. Tantau Austra­ lia PO Box 1232 Lane Cove 2066 AH (02) 878 4715 EPROM Reader software is included with my interface to control the outside world from a PC parallel port. 32 bits out. Units can be cascaded. Short form kit $35. Relay PCB to suit. $15, or send $2 for my 3.5-inch demo disk. Don Mc­ Kenzie, 29 Ellesmere Crescent, Tulla­ marine 3043. Ph (03) 338 6286 BATTERIES: 12-volt, 65A.h special Gel suitable for solar power supplies. 12-volt to 240-volt applications, camping $100 PH (02) 307291 BUSINESS CENTRAL WEST QLD for sale. $40,000. Genuine enquiries. Ph: (076) 58 1928. HF, UHF, TV, VCR repairs and sales. 96  Silicon Chip ‘HEY LOOK’ AFFORDABLE REPAIRS PLUS ELECTRONIC DESIGN AND MANUFACTURING GIVE US A CALL NOW HYCAL ELECTRONICS Advertising Index All Electronic Components..........39 Altronics ..........................IFC,28-31 Antique Radio Restorations.........95 A-One Electronics...................68,69 Av-Comm.......................................8 Boston Technology........................9 Cebus Australia...........................36 David Reid Electronics ................3 Dick Smith Electronics.....IBC,12-15 EEM Electronics..........................96 Harbuch Electronics....................36 Hycal Electronics.........................96 Instant PCBs................................96 Jaycar ................................... 45-52 Kalex............................................39 L. E. Chapman.............................89 Nilsen Instruments...................OBC Oatley Electronics.....................7,37 PC Computers.............................96 Pelham........................................87 Peter C. Lacey Services..............40 RCS Radio ..................................95 Rod Irving Electronics .......... 74-79 Secontronics................................96 Silicon Chip Back Issues........90,91 Silicon Chip Binders....................21 Sportsound (Tandy Dealer).........17 T. A. Mowles.................................96 Tektronix......................................25 Transformer Rewinds...................95 Wombat Electronics.....................87 PH (02) 633 5477    FAX (02) 891 5640 PRINTED CIRCUIT boards for the hobbyist. For service & enquiries contact: T. A. Mowles (08) 326 5590. SATELLITE TV SYSTEM: Ku band, 1.8-metre dish, 0.9dB LNB, IR remote control receiver, feed horn and polariser. $1085.00 phone: (09) 306 3738 fax: (09) 306 3737. FOR SALE: 59 issues of SILICON CHIP, excellent condition, from 1987 on. The lot $150. Phone 067 658079. SOLVE YOUR SMALL circuit development problems quickly, try this one. 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 sink 25mA or source 20mA board space includes 6 x 10 pad prototyping area. Has 216 type battery con­nections. Program it on a PC with our development kit which includes one BASIC STAMP $245 incl p&p. Commands in­ clude POT (crude A/D), PWM (crude D/A), BUTTON , SERIN, SEROUT, SOUND & SLEEP. Extra BASIC STAMP modules $66 incl p&p. Reprogram­ mable for reuse. For more info send SAE for data sheet & circuits. Quantity prices available. Bank­ card, Master, Visa or cheque with order. Parallax of USA products distributor & technical support in Australia. MicroZed Computers, PO Box 634, Armidale 2350. Fax (067) 728987. GLOBAL ELECTRONIC SERVICES: kits; consultancy; sales & design. Please write/fax requirement to: Mr Lucas, PO Box 755, Saint Helier, Jersey JE4 8ZZ, Channel Islands (UK). Fax (0 534) 80570.