Elenco Electronics MO-1251 Manual de usuario

Plus: * Shortwave Radio * Hardware Hacker * Audio Update ail IoHI -TECH e HOME SECU =MI APRIL 1989 TECHNOLOGY - VIDEO - STE+ E HOW TO INSTALL A HOM

s TALK IS CHEAP. Have you heard? For less than $90 your AT or XT- compatible com- puter can talk! All it needs is the HV -2000 Computer Voice Kit fro

SUPER VALUES! B &K 40 MHZ OSCILLOSCOPE SAVE $250 sweeps 6ät CRT with internal graticule and scale illumination Video sync separator Single sweep

EXPAND YOUR CAREER HORIZONS... ELECTRONICS EDUCATION OF TOMORROW TODAY "N_ START WITH CIE. Mi. roprocessor Technology. Satellite Communications.

ATTENTI 'N! E LE ÑÑia 1 EARN YOUR \ B.S.E.E. DEGREE " THROUGH HOME STUDY Our New and Highly Effective Advanced- Place- ment Program for ex

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14 Get A Complete Course In ELECTRONIC ENGINEERING 8 volumes, over 2000 pages, including all necessary math and physics. 29 examinations to help you

frequencies as low as 0.1 Hz are easy to detect. If you can set the beat that low at 10 MHz, that's only 0.01 ppm. Adding the WWV toler- anc

16 ENJOY CABLE TV MORE THAN EVER SNOOPER STOPPER /DATA BLOCKER , - C. Prevent cable Removes beeping Cable TV descramblers companies from sound from y

EQUIPMENT REPORTS Sencore LC102 Capacitance /Inductance Meter Check capacitors and inductors the fast and easy way! CIRCLE 14 ON FREE INFORMATION CARD

Cable testing Coaxial cables and transmission lines behave like a capacitor when open at both ends. The LC102 can therefore be used to determine t

How to build a high -paying career, even a business of your own, in computer programming. CARL BARONE, NRI PROGRAMMER /ANALYST Start with training tha

F L U K E A N D P H I L I P S - T H E G L O B A L A L L I A N C E I N T E S T & M E A S U R E M E N I FLUKE

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DUST REMOVER. Chemtronic's E- Series line of chemicals for com- puter and electronic field service has been formulated to be en- vironmental

WITH CIE, THE WORLD OF ELECTRONICS CAN BE YOUR WORLD, TOO. Look at the world as it was 20 years ago and as it is today. Now, try to name another fie

HARDWARE HACKER Refilling SX toner cartridges BOY, THERE SURE HAS BEEN A LOT OF helpline response to the solid - state compass stuff we lo

26 Only this time, your digital word consists of the top 8 bits of a 24 -bit adder /accumulator. At a constant and high clock rate, a fixed phase in

A & A Engineering 2521 W. LaPalma Unit K Anaheim, CA 92801 (714) 952 -2114 BLH Electronics 75 Shawmut Road Canton, MA 02021 (617) 821 -2000 Color

An affordable portable i Price/Bandwidth $4995 100 MHz 2230 DSO; 20 MS /s, 4K Record Length, 100 ns Glitch Capture, Cursors, CRT Readout, GPIB or RS

right within your range. r Ii, uT n x}If DIY 07.: 3 H t !" 0 For easy ordering or more information, call Tek direct: Industrial -quality test in

Drill 5/8 inch hole using a #3 Vise Grip Unibit; carefully clear all chips Il FIG. 3- ADDING A FRESH TONER filling hole to an SX cartridge. Use

L It takes more than a water - filled moat to protect your castle HERB FRIEDMAN EARLY MAN PROTECTED HIS HOME against marauding beasts and the t

April 1989 Radio Electronics Vol. 60 No. 4 BUILD THIS 47 WIRELESS SECURITY SYSTEM Our easy -to -build system combines infrared and RF technologies. D

34 central monitoring facility. A comput- er at the central station tells the duty operator precisely what is wrong at the home: a fire, a burglary,

opened. Since the alarm bell, BZ1, is connected across RYI's solenoid coil, it sounds off. Because some towns and cities frown on alarms that so

36 ping hit anywhere in the neigh- borhood usually wiped out the control center. Fortunately, false- triggering is no longer a problem in the newer

tection, or medical supervision. Vir- tually every feature- including the function and operation of the loops as well as automatic battery testing

38 Electronics and Control Engineers' fir° Book - ._ Club® BUCHSBAUM'S COMPLETE HAND- BOOK OF PRACTICAL ELECTRONIC REFERENCE DATA, Third

BASIC TELEVISION AND VIDEO SYS- TEMS, Fifth Ed. By B. Grob. 592 pp., illus. Provides the clearest picture of how television and video systems w

12 INSTALL A HOME SECURITY SYSTEM Do it yourself and save on the cost of a professional -quality home burglar alarm. ... ...: HERB FRIEDMAN and

also shows the condition of the back- up battery. There are front -panel switches for testing the battery and the alarm siren or bell. In our sys

44 FIG. 5-WIRE LACING WILL PROTECT a screened basement window or a crawl - space opening. FIG. 6-IF A WINDOW SCREEN must be removed and lacin

an older house with a thick door trim, or if the door has sagged, there might be no way to locate the switch and its magnet within their working separ

2 ON THE COVER Tac Rad Sima :ECU ECo How' TO ISS A HOMESE(l'R 1MtN1 TIN trcbny.r fee .Irrd non ,rlrriw *Tel? BUILD YOUR OMR SECURITY S. A

46 response of "Security emergency!," "Fire emergency!," or "Medical emergency!" you can record a 15- second mess

J WIRELESS SECüRITY SYSTEM L -LF DAN BECKER Build a wireless security system that monitors an area casing an invisible infrared beam and beeps a hand

48 IR transmitter As shown in Fig. 2, current through IR -LEDI and IR -LED2 is switched on and off by Q2. Resistors R6 and R7 limit the peak curre

C10 180pF - 2IN\ LDR1 VT 835 i--- 02 2N4403 R1 1MEG TP3 C13 10µF R18 1MEG R3 100K C12 10µF ICI -b LM358 fl4 Cl 2.7K .1 w- K R5 1MEG 1M TPl C11 001 1

R19, 20K; 50 ANT Cl 5pF iF1 C1 Q1 002 MPSH11 -----t- R1 10K C4 24pF R2 R3 C5 2 2K 4751 .002 R16 R15 13061 6.8K R4 2K I C6 18pF 2 3 r--1 11 4 J 4L - C

PARTS LIST RF RECEIVER /ALERT BEEPER All resistors are 1/4 -watt, 5 %, un- less otherwise noted. R1, R11, R21- 10,000 ohms R2 -2200 ohms R3-47 oh

52 mitter, the IR receiver /RF transmitter, and the RF receiver /alert beeper, re- spectively. All resistors are installed vertically. Capacitor

ALPHAITH E MEDITATIO GOGGLES Our alphaftheta meditatio goggles can help you relax! * 7. MA ALPHA/V./ETA EDITAiIOH GDGGU S MARK WORLEY MOST OF US :D T

meditate, or for self -hypnosis train- ing. You'll find that the alpha waves occur while you're in a state of relax- ed awareness, whi

R6 R5 R4 C2 I R G R7 FLASHRATE R3 -i-- D1 ALPHA THETA S21K C4 C3 J F R7 03D R8 R9 RIO Ql r CI Q2 -11 O J1 O- 0 GOGGLES S1 ON OFF O- J2 O r 0 AC ADAPTO

Now electronics technicians can get into VCR Servicing quickly and easily Learn professional VCR servicing at home or in your shop with exclusive v

56 PARTS LIST All resistors are' /4 -watt, 5 %. R1- 10,000 potentiometer R2, R9 -4700 ohms R3 -1500 ohms R4, R7, R8- 10,000 ohms R5- 10,000 tr

feel that the flashrate somehow feels too fast and too slow. Somewhere in between those two extremes is a flash - rate that's just right for

rn U z o cc o w w Ó E ¢ 58 Radio- o 0 Electronics írC -Gil= THE MODEL WTT -20 IS ONLY THE SIZE OF A DIME, yet transmits both sides of a tele-

L J S -J DIGITAL ROGER D. SECURA DETECTOR When you need to know the hottest, the fastest, the highest, or the absolute most, you need to build our

60 PARTS LIST All resistors are 1/4-watt, 5% unless otherwise noted) R1, R7 -1000 ohms R2 -100 ohms R8, R9, R42- 10,000 ohms R3-R6, R10- R19- 10,000

+ 5V 4 16 11 15 Nvs 1 R41 250K 2 R42 10K VN 5V t TP7 O +5V RESET S2o +5V + 5V R6 10K TP6 1 101 9 1T 81 R5 10K Q2 2N3904 TP4 CLK A R10 R1 10K 10K TE

Put Professional Knowledge and a COLLEGE DEGREE in your Technical Career through Add prestige and earning power to your technical career by earni

14 13 1!, v h l IC1 4017B CLK ENABLE Rf',f L'.1! DO 0 DO 1 DO 2 DO 3 DO 4 DO 5 DO 6 DO 7 DO 8 DO 9 3 4 10 5 6 9 11 CARRY 12 OUT WORKI

14 71N 5-15V 161 12 1ouT - ~ fn0 64 CLK Cl 40178 CARRY OUT RESET CLK ENABLE 8 115 113 FIG. 3-A 4017B CONNECTED as a decade counter divider. 14 fIN

L 14 +5-15V 16 15 RESET ICI 40178 CLK CLK ENABLE DECODED OUTPUTS 0 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 13 CLOCK INPUT 14 \ IC3-c 4001B 16 15 CLK I

4 WHAT'S NEWS Packet proposed for shuttle WAYNE WILSON WB8TSO OF HEATH COMPANY (in jacket) presents Gil Carmen, presi- dent of the Johnson Spac

66 2 6 CLK CLK ENABLE 15 RESET 14 LAMP TEST 3 { a 10 b 12 13 e g 9 11 6 CARRY OUT 5 RIPPLE RIPPLE BLANKING IN BLANKING OUT 18 a fi l_alb d LED S

CLK INPUT 01 ENABLE CI -K 02 03 114 45188 OR '. 45208 RESET 01 ENABLE CLK 02 03 45188 OR 45208 RESET 04 Ol ENABLE CLK 02 03 04 ' : 45

68 pins facilitate an internal carry look - ahead feature that is useful in fast counting applications. Synchronous up down counters Synchrono

0 2 SH INCHES ALPHA MEDITATION GOGGLES foil pattern. TS 3 0 o ONO 2'3/46 INCHES IR RECEIVER /RF TRANSMITTER foil pattern. THEIR TRANSMITTER

70 AUDIO UPDATE The importance of amplifier output current. MANY YEARS AGO, I WAS INVITED TO attend a record company's press conference,

fiers will deliver only about 50% more power into 4 ohms than 8 ohms, due to power -supply cur- rent limitations or the intervention of thei

72 SHORTWAVE RADIO International Frequency Coordinating Committee 50 kH 65 STANLEY LEINWOLL - 6150 kHz A B C D u,c 6 17 to -(- BTcD _ 0 1 2 3 4

R -E Engineering Admart MIDI PROJECTS MIDI Projects BP182 -MIDI interfacing enables any so equipped instruments, regardless of the manufacturer, to

74 D MACRO WA VE OVEN The big chill: Build a macrowave oven. LAURENCE HAKEMACHI ONE OF THIS GENERATION'S MOST SIGNIFI- cant electronics accomplis

FIG. 3-HEAT REMOVED from cooled is down -converted harmlessly re- radiated by a sion dissipation device. done, see box on this page) and re- pl

HANDHELD DIGITAL IC COMPARATOR TESTERS FEATURE 20 CHANNEL LOGIC MONITOR B &K- PRECISION's Model 550 and 552 IC Comparator Tester /Logic Mon

o z o Q - o w J w o ó 76 HARDWARE HACKER continued from page 32 Next, for plenty of the hands -on construction details, check out Chediski, Colcord,

COMPUI COMPUTERDIGEST A PC run circles oround o Cray? Despite advances in micro- processor technology, the single -CPU architecture of the person

78 Of course there's no software for it now, but Microsoft, Aldus (PageMaker), and Micrografx (De- signer) are working feverishly to get ne

R -E Computer Admart SECRETS OF THE COMMODORE 64 8P135 -A beginners guide to the Commodore 64 pre- sents masses of useful data and programming tips,

80 CABLE TESTER continued from page 77 switches quickly, all three devices will appear to be on at the same time. That process is called multi- ple

P1 IC1 A B C IC2 IC3 GND 4 11 10 9 6 7 8 2 14 16 FROM PC5 PARALLEL PORT +V B1 1.5V +I B2 1.5V 4+ B3 1.5V I 16 11 10 9 6 7 8 ICI 4051 V +V 16 3 IC2 405

82 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 11 11 12 12 13 13 14 14 15 32 16 31 17 36 19 19 25 30 25 -PIN D CONNECTOR (MALE) II 36 -PIN CENTRONICS PAR

TRANSPUTER continued from page 77 Divide and conquer The idea is to divide and con- quer; let's illustrate with an anal- ogy. If, for example, y

RESET ANALYZE ERROR MEMORY CONTROL SIGNALS ON -CHIP FLOATING -POINT COPROCESSOR 11800 ONLY) i SYSTEM SERVICES TIMERS 2K BYTES ON -CHIP RAM (4K -T800

Pipelining Pipelining gets its name from the fact that several processors are connected serially, like sec- tions of pipe, with the output of th

VIDEO NEWS Personal video. Sony's compact Video Walkman, which combines an 8mm VCR and a TV set with a 3 -inch LCD screen in a book -size package

86 Parallel architectures In conventional processing, the system is fed a problem se- rially, one chunk at a time: do A, then B, and then C. An ad

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92 PRESENTING it # -P # CABLE TV DESCRAMBLERS -PPP -P ir STARRING it 4r *it JERROLD, HAMLIN, OAK AND OTHER FAMOUS MANUFACTURERS FINEST WARRANTY PROG

SHORTWAVE RADIO continued from page 73 source -frequencies, it has continued to solve problems. Although disputes have sometimes been heated and b

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