YOUR ONE -STOP SOURCE OF ELECTRONICS INFORMATION ICD 08559 MAY 1990 82.50 CANACA 13.50 1 1 70 THE M4 G.4ZINE FOR ELECTRONICS & COMPUTER ENTHUSIASTS Special Focus On Math - Solving Products: MathCAD v2.5, Derive v1.60 & CPMCALC4 Math PC Software Hewlett-Packard's New HP 48SX Scientific Calculator Also Featured: A Programmer for the 68701 Microcomputer Chip Electronic Control for Slide Projectors Interfacing 555 Timers To the Reel World E'ectronic 2.ontro lerler Slide Projector, ip. 36) Pius Hands -On Look at the New `Loaded" HawlettPackard LaserJet III Laser Pvinber Experimenting With Ircandesc9nt _amps Latest NEW Electtovic and 0 Computer Products ... more. IR. 38550 KENWOOD Head it All! VOICE TIMER ' r M u-a COMMUNICATIONS NECEIVER ... woof./ KEY rRESET, NB ;r IF SHIFT l5 RE prir C' ANT / ANT 2 - gM -HF/VHF Nil NS2 NOTCH ZS I= 1 MHz 012 5OO@aht. YCN ELI Eg SE o s tAE R -2000 iì$ß pertornnance The R -2000 is an all band, all mode receivers. receiver with 10 memory channels and Scan the entire frequency many deluxe features such as program- range from 100 kHz to 905 mable scanning, dual 24 -hour clocks MHz with Kenwood's with timer, all -mode squelch and R -5000. R -2000 and noise blankers, a large, f ront- RZ -1. Listen in on mounted speaker, 110 volt AC or foreign music, news. 12 volt DC operation (with the DCK -1 cable kit), and 118 -174 and commentary. (t, Monitor local police. MHz VHF capability with fire, and other public VC -10 option. safety services, as well as the Optional Accessories Marine channels, and the many other R -2000: services 50 MHz and above. super easy! Other useful features VC -10 VHF converter DCK -1 DC TneVH1- convener options InusiDe used IIItneH -5000 include programmable scanning, large, cable kit for 12 volt DC use. and R 2000 built -in speaker, 110 volt AC or 12 volt DC R -5000: R -5000 operation (with optional DCK -2 cable), VC -20 VHF converter VS -1 Voice module DCK -2 for 12 volt DC operation The R -5000 is a high performance, top - VHF capability (108 -174 MHz) with the -1 AM filter SSB of- the -line receiver, with 100 memory VC -20 option, dual 24 -hour clocks with YK -88A YK -88SN filter channels, and direct keyboard or main timer, and even voice frequency readout filter YK -88C CW MB -430 Mounting bracket. dial tuning -makes station selection with the VS -1 option. Other Accessories: SP -430 External speaker SP -41 -1 easier. One hundred memory channels RZ with message and band marker, direct Compact mobile speaker SP -50B Wide -band scanning receiver keyboard or VFO frequency entry, and Mobile speaker HS -5 Deluxe head- versatile scanning functions, such as phones HS -6 Lightweight headphones memory channel and band scan, with HS -7 Mini- headphones. four types of scan stop. The RZ -1 is a 12 volt DC operated, compact unit, with built-in speaker, front -mounted phones jack, switchable AGC, squelch for narrow KENWOOD The RZ -1 wide -band, scanning receiver FM, illuminated keys, and a "beeper" to covers 500 kHz -905 MHz, in AM, and confirm keyboard operation. KENWOOD U.S.A. CORPORATION narrow or wideband FM. The automatic Optional Accessory 2201 E. Dominguez St., Long Beach, CA 90810 mode selection function makes listening PG -2N Extra DC cable P.O. Box 22745, Long Beach, CA 90801 -5745 Specdreatxons leatures and paces are subject to change without notice or obtlgat,on CIRCLE 41 ON READER SERVICE CARD and you can too! Andy is a Ham Radio operator and he's having with, Amateur Radio is the hobby for you. The the time of his life talking to new and old friends world is waiting for you. in this country and around the world. You can do it too! Join Andy as he communi- If you'd like to be part of the fun ... if you'd like to cates with the world. Enjoy the many unique and feel the excitement ... we can help you. We've exclusive amateur bands ... the millions of fre- got all the information you'll need to get your quencies that Hams are allowed to use. Choose Ham license. Let us help you join more than a the frequency and time of day that are just right million other Hams around the world and here at to talk to anywhere you wish. Only Amateur Ra- home. Who are we? We're the American Radio dio operators get this kind of freedom of choice. Relay League, a non -profit representative organ- And if it's friends you're looking to meet and talk ization of Amateur Radio operators. For information on becoming a Ham operator circle number 110 on the reader service card or write to: 225 Street AMERICAN RADIO RELAY LEAGUE Dewtington, Main This space donated by this publication in cooperation with the American Radio Relay League. THE TM. B .I. R. D. Battery operated THE MAGAZINE FOR ELECTRONICS A LOMPU I f It ENTHUSIASTS InfraRed Detector MAY 1990 VOLUME 7, NUMBER 5 CENTRONICS PARALLEL IF introduces FEATURES Parts Express I' t the first Battery 7 is siditai operated InfraRed 16 Special Focus on Math -Solving Products: Detector pen. MathCAD v2.5, Derive v1.60 & CMPCALC4 This compact Math PC Software. device will Hewlett -Packard's New HP 48SX Scientific Calculator. instantly By Joseph Desposito confirm 24 24 An MC68701 Microcomputer Chip operation Programmer of infrared 01 Computer -controlled device programs the R2 MC68701 to customize it for your applications. emitting Li C9 R4 B. Beard C7 C8 r, - By Brian prod- 36 Electronic Controller for Slide ucts. v Projectors R3 Controls on /off of projector only when slide is J\ needed and provides fade -in /fade -out for smoother presentations. By David Pointing Indi- -1 R1 44 Extended Play Remote -Control System cates 44 (Conclusion) presence Operating and construction details for receiver of infrared module, system checkout and installation and use. By Crady VonPawlak in normal light. Slim 52 Interfacing 555 Timers ! Hands -on look at real -world use of this ubiqui- design easily tous and very versatile IC timer chip. reaches IR By Joseph J. Carr emitters on crowded VCR COLUMNS circuit boards. This 67 low cost and easy to 58 Electronics Notebook use instrument will Experimenting With Incandescent Lamps. soon become standard By Forrest M. Mims J!! equipment for all techni- 64 Solid -State Devices in the consumer Filters, FIFOs and Other Devices. cians By Joseph Desposito electronics repair 67 PC Capers industry. Laser Wars: Hewlett -Packard's New LaserJet CALL TOLL FREE III Laser Printer. By Ted Needleman 1- 800 -338 -0531 DEPARTMENTS JEXPPeSS 6 Editorial rrrr ; By Art Salsberg 340 E. First St. 7 Letters Dayton. Ohio 45402 Phone: 513-222-0173 8 Modern Electronics News FAX: 513- 222 -4644 9 New Products 82 Advertisers Index ( IR( I I Nu. 163 'S FRET .INHIHM,4IIUN ( 4R11 16 4 / MODERN ELECTRONICS / May 1990 Say You Saw It In Modern Electronics EDITORIAL STAFF Art Salsberg CABLE -TV Editor -in -Chief Alexander W. Burawa Managing Editor Dorothy Kehrwieder Production Manager Elizabeth Ryan Art Director Barbara Terzo Artist Pat Le Blanc Florence V. Martin Phototypographers Hal Keith Illustrator BONANZA! t 10 OR Bruce Morgan ITEM UNIT MORE Photographer HAML IN MCC 300036 COHDED REMOTE CONVERTER (Ch .(only, 7900 180U Joe Desposito, Forrest Mims IH, PANASONIC WIRELESS CONVERTER lour best boy) 9800 7900 I.ne Ted Needleman, MOVIE TIME VR7200A (manual tune) 8800 6900 Curt Phillips ' JERROLD 400 COMBO 169 00 11900 Contributing Editors JERROLD 400 HAND REMOTE CONTROL 2900 1800 ' JERROLD 450 COMBO 19900 139 00 BUSINESS STAFF 'JERROLD 450 HAND REMOTE CONTROL 2900 1800 6300 Richard A. Ross JERROLDSB-ADD -ON 9900 ' JERROLD SB-ADD ON WITH TRIMODE 10900 7500 Publisher 'M-35 B COMBO UNIT I Ch 3 output only) 9900 7000 Art Salsberg 'M-35 B COMBO UNIT WITH VARISYNC 10900 7500 ' MINICODE IN-121 9900 Associate Publisher 6200 ' MINICODE IN 121 WITH VARISYNC 10900 6500 Dorothy Kehrwieder ' MINICODE VARISYNC WITH AUTO ON -OFF 14500 10500 General Manager ECONOCODE I minicod. subs10ute1 6900 4200 ECONOCODF WITH VARISYNC 7900 4600 Frank V. Fuzia 'MLD 1200.3(Ch 3outpul 9900 6200 Controller 'MLD -1200 21Ch 2outpuh 9900 6200 'ZENITH SSAVI CABLE READY 17500 12500 Catherine Ross INTERFERENCE FILTERS ,Ch 3onlyl 2400 1400 Circulation Director 'EAGLE PO 3 DESCRAMBLER ICh 3oulP l only 11900 6500 Melissa Kehrwieder 'SCIENTIFIC ATLANTA ADD -ON REPLACEMENT DE SCRAMBLER 11900 8500 Data Processing Kathleen Bell Output Price TOTAL Quantity Item Customer Service Channel Each PRICE SALES OFFICE Modern Electronics 76 North Broadway Hicksville, NY 11801 (516) 681-2922 California Penal Code #593 -D forb ds us SUBTOTAL from Shipping Add FAX: (516) 681 -2926 shipping any cable descrambling unit to anyone residing in the state of California. $3.00 per unit COD 8 Credit Prices to without notice. Jonathan Kummer subject change Cards - Add 5% Advertising Manager DI caec DDIAIT TOTAL Emily Kreutz Name Sales Assistant Address City State Zip Phone Number ( C Offices: 76 North Broadway, Hicksville, NY 1 1801. Tele- Cashier's Check Money Order COD Visa Mastercard phone: (516) 681 -2922. FAX (516) 681 -2926. Modern Acct # Exp. Date Electronics (ISSN 0748 -9889) is published monthly by CQ Communications, Inc. Subscription prices (payable Signature in US Dollars only): Domestic-one year 517.97, two years 533.00, three years $48.00; Canada /Mexico -one FOR OUR RECORDS: year 520.00, two years $37.00, three years S54.00; For- DECLARATION OF AUTHORIZED USE - I, the undersigned. do hereby declare under penalty of perjury eign -one year 522.00, two years 541.00, three years that all products purchased, now and In the luture, will only be used on cable TV systems with proper $60.00.