build our triode pre -amp

68 Pages·2016·7.08 MB·English

AN ARGUS SPECIALIST PUBLICATION
INTERNATIONAL! 1 AtlGtlBT 198G R1.70
BUILD OUR TRIODE PRE -AMP
AND FIND OUT FOR YOURSELF
PLUS
KEEP TRACK OF YOUR TELEPHONE WITH THE
ETI INTELLIGENT CALL METER
DIGITAL PANEL METER TO BUILD
ELECTRONICS BAD FOR YOUR HEALTH?
PRICES INCLUDE V.A.T. * PROMPT DELIVERIES * FRIENDLY
SERVICE * LARGE S.A.E. 28p STAMP FOR CURRENT LIST
OMP POWER AMPLIFIER MODULES Now enjoy BURGLAR ALARM IDEAL for Work-
world-wide reputation for quality, reliability and performance at a realistic price. Four models Better to be 'Alarmed' then terrified. shops, Factories,
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Vpoo wmeer tesru ppOlyp,e nIn taengdra sl hhoerta tc isrcinuki,t Gplraososf fibreS uP pp. Bl ieadnd rDeraivde yc ibrcuuiitlst tao npdow teer sctoemdp.a tible cGoUmApRleAtNe TEEwDi-t.h Interconnecn on cable. FULLY ready built
Control Unit Houses microwave radar unit range
OMP100 Mk II Bi -Polar Output. power.110 up to 15 metres adjustable by sensitiv-it y c-on trol.
wpSo.aNnt.stRse R1-.5M1H 1zS 8. -d inB3t0o,K H4S ze onhsm.3 sdf,Bo ,rF rTeM.qHau.xDe.n. c0oy .u0Rt1pe%us,-t T-i1nh 0dr4aeodremoB pr e odosu.a tit3lpiao0urnt m..s e kce-o-y n do pEeelxreaitc tteardon ndf iacec niats rwysw ediptect lha yf.r eqo.f f sirteens.t
500mV at 10K, Size 355 X 115 X 65mm. Outdoor Alarm Electronic swept freq siren. 98dB
PRICE £33.99 + £3.00 P&P. output- HoLsed in a tamper -proof heavy duty metal
case
OwaMttPs /MR.FM1.S0.0 inMtoo s4- Foehtm Os,u tFpruetq upeonwceyr R1e1s0- cdBhuoartihrng get hameba leicn osnb ftaarotiltule rrueien istP aownwhdei crohre uqtpduriooreovmrid aeelna trf mu2ll 0c0po/r2not6tae0icn tV ioorenlt-
80p0.o0,n 0s2eS% le1, HwzI n-p Ru1a0tt e0 KSH4ez5n Vs-ir3t idvuiSBty, , DT50.aH0m.mDpVi.n ,g T SyFp.aNicc.tRao.lr SAbCuA ttVo5n0Es/6 0ettHc z 1 C3oE8mx.po0laen0ted awubslietuh a wli niPtshrti crued cot£oio2r n2ss8e 8n5s ors. panic
-125dß Size 300 X 123 X 60mm. PRICE BKE's PRICE £89.99 + £4.00 P&P
PRICE £39.99 + £3.00 P&P. > Why buy a cnitecbon of self assembly boards,
OMP/MF200 Mos-Fet Output power 200
watts R M S into 4 ohms, Frequency Res- ,OMP LINNET LOUDSPEAKERS
ponse 1Hz - 100KHz -3dB, Damping Factor The very best in quality and value. Made specially to suit todays
250, Slew Rate 50Ví uS, T.H.D. Typical need for compactness With high sound output levels. Finished in
0.001%, Input Sensitivity 500mV, S.N.R. hard wearing black vym,'z with protective corners, grille and carry
P-1R3IC0Ed B£, 6S2i.z9e9 3 0+ 0£ 3's .5105 0P X& P1. 00mm. PRICE h1a5n" dl'e .1 A2"ll mWoadttesl sR 8M o hSm sp erF uclal brinaentg. eS 4e5nHszit iv- i2ty0 K1HWz S1 imzetr 20dB" .
OMP 12-100 Watts 1'10dB. Pricef149.99
OMP/MF300 Mos-Fet Output power 300 per pair.
watts R.M.S. into 4 ohms, Frequency Res- OMP 12-200 Watts 102dB. Price f199.99
p3o5n0s, e S1lHezw - R10a0teK H6z0 =V3: duBS,, DTa.Hm-Dpi.n gT Fypaicctaolr per pair. Delivery Secuncor £8.00 per pair
0.0008%, Input Sensitivity 500mV, S.N.R.
-130dB, Size 330 . 147 X 102mm. PRICE 19" STEREO RACK AMPS 1 K -WATT
PRICE £79.99 - £4.50 P&P. SLIDE DIMMER
* Control loads up
PN OA.T Eve: rMsiossn F(5eGtsK Harze bsaunpdpwlieiddt ha s &s tIannpduat rdS e11n0s0itKivHitzy b7a7n5drewVid) thO &rIdnepru -t SSetnasnidtiavritdy 5or0 0Pm AV l If required. t*o 1C Kowm pact Size
Vu METER Compatible with our four amplifiers detailed above. A * Easy snap in fix-
very accurate visual display employing 11 L F D. diodes (7 green, 4 ing through panel
red) plus an additional on off indicator Sophisticated logic control cabinet cut out
circuits for very fast rise and decay times. Tough moulded plastic * Insulated plastic
cPaRseIC, Ew it£h8 .t5in0te d- a5c0rypl icP &froPn. t Size 84 27 45mm Professional 19" cased Mos-Fet stereo c* asFeu ll wave con-
amps. Used the World over in clubs, pubs, trol using 8 amp
discos etc. With twin Vu meters, twin trac
LOUDSPEAKERS ä" to 15" up to400 WATTS R.M.S. toroidal power supplies, XLR connections. ßS800 * Conforms to
Cabinet Fixing in stock. Huge selection of McKenzie MF600 Fan cooled. Three models (Ratings * Suitable for both resist-
SL.oAu.Ed.s p(2e8apk)e rfosr a vfraeiela bdleet ainilsc.lu ding Cabinet Plans. Large RM.FM2,S0.0 in(1to0 04 o+h m1s0)0. )Wn,p.tr t £br1it 6si9i .c0ite0 7 7Sbuer2c uricor aninnudcmeu esartarnydb, l ein tdhauecp tpivhlieco amltoieoa,dn ss a Innidn-
POWER RANGE MF400 (200 + 200)W. £228.85 Delivery disco's, theatres etc.
82"0, 5oz0 WmAagTnTe tR .Ml'.."S . aHllyi- Fvio, icDei sccooi.f Ground ally fixing escutcheon Res Freq 40Hz Freq Resp to MF600 (300 + 300)W. £299.99 £10.00 PRICE £13.99 - 75p P&P
61K2H" z1 0S0e nWs AT92Td BR .MPR.SIC. EH£i1-F0.i9/D9Aisvcaoi labte with black grille £11 99 P&P £1 50 ea
50 oe magnet 2" ally voice coil Ground ally fixing escutcheon Die-cast chassis White cone Res BSR P295 ELECTRONIC TURNTABLE
F25reHqz Freq Resp to 4KHz Sens 95dB PRICE £28 60 £3 00 P&P ea M* inEulesc trvoanriica bslpee epdit ccho nctoronlt r4o5l &* 3B3e' lt , rd pri vien n aa PAlulsu -
minium platter with strobed nun * Cue lever *Anti
McKENZIE skate (bias device) e Adjustable counter balance o
12" 85 WATT R.M.S. C1285GP Lead guitar/keyboard/Disco Manual arm * Standard cartrige finings -e
2" ally voice coil Ally centre dome Res Freq 45Hz Freq. Resp. to 6 5KHz Sens. 98dB PRICE £29.99 Supplied complete with cut out template * D.C.
+ £3.00 P&P ea. Operation 9-14e D.C. 65mA
12" 85 WATT R.M.S. C1285TC P.A/Disco 2" ally voice coil. Twin cone. Price £36.99 £3 00 P&P.
Res. Freq. 45Hz Freq. Resp. to 14KHz PRICE £31.49 + £3.00 P&P ea
135" "a l1ly5 0v oWicAe TcTo ilR D.Mie.S-c.a Cs1t 5c hBaassssis GReusit.a Fr/rDeqis. c4o0.H z Freq. Resp. to4KHz PRICE £57.87 +£4.00 P&Pea 0ADC Q4 mag. cartridge for above Price £4.99 ea. P&P hop
10" 60 WATT R.M.S. 1060GP Gen. Purpose/Lead Guitar/Keyboard/Mid. P.A.
2" voice coil. Res. Freq. 75Hz Freq. Resp. to 7 5KHz Sens. 99dB. PRICE £19.99 + £2.00 P&P PIEZO ELECTRIC TWEETERS MOTOROLA
12105" ""v o22i00c00e WWcoAAiTTl. TTR RRes..MM. .F.SSr.e. qCC. 11450522H00z00. G HFPirge Ghq. u PiRtaoerws, pe.Kr etBoya b7sosKa.H rdz,. DSeisncso. . 101 dB PRICE £44.76 + £3.00 P&P Jcimoroipnsr sootvhveeed r Ptisrie aznnoso iter enrvet oqlruuetisrioepndo. n tshTeeh sewe iltuohnw i tas d ylconawanm ebri ce d aimsdtadosertsdi o n(ton ole evxvoiesilct ient gha csnop de)o aorkdf einr4 a srPyyi esdcteeym ntasw moefiec t ueptrw -tepoer ot1ed0ru0sc ewAsa sat tnsa
Res. Freq. 40Hz. Freq. Resp. to 5KHz. Sens. 101dB. PRICE £62.41 + £4.00 P&P (more if 2 put to series) FREE EXPLANATORY LEAFLETS SUPPLIED WITH EACH TWEETER.
1R5e"s .4 0F0re qW. A4T0TH zR. .MFr.eSq. . CR1e5s4p0. 0t oH 4igKhH zP. owSeenr sB. a1s0s2. dB PRICE £89.52 +£4.00 P&P. TYPE 'A' (KSN2036A) 3" round with protective wire
mesh, ideal for bookshelf and medium sized Hrfi
WEM speakers. Price £4.90 each 40p P&P.
5" 70 WATT R.M.S. Multiple Array Disco etc. tr TYPE 'B' (KSN1005A) 3'," super horn For general
181""" v1voo5i0icc eeW ccAooTiill T.R ReRse..sM . F.SrFe.r qe.Mq 5.u 2l4Hti8pzHl ezF rAeFrqrre.a q5y.2 RHDeziss Fpco ret oqe .t5 cRK. eHszp . Stoe n5sK. H9z2 dSBe nsP.R 8IC9dEB £ P3R2.I0C0E +£ 2£21..0500 +P £&1P. 5e0a P. &P ea TYPAE Tp£Yu5Pr.p9Eo 9s 'eeC as',cp heI Kak-S eN4rs06, p0 d1Pis6&cAoP) . an2d" P+. A.5 "s yswtiedme sd eistcp.e rPsriiocne
61111S51 V1"02"O /. ""2,v ""6vU o33ov0Ni006ioc c000eiDWec WWeLcWAc AoAAoTcAiBioTTlTl T iTT RlT (RR eF RRRe.sRuMse... MMl.s.l . MF.S.. RFSSrF.e.r a..Serq enq.H.DD q.g 3.eiHii 6ssF5 33cciHiT-H5oo/FzMwH//z SSi.z/iF unMoo rFl uueFturCqinnrepel.oddqt qli.n epR .r reeRl eeRe) A es --e eepsrsApr.nnp a.rtff .oyroo at rrtooccy4D ee K24immDsH0KcKieezsHoH nnc zSttzoe e.ee S tnctteScces.t.. nec. s.n 9.s 2 9d48Bd6 BdP 3RP. IRCPIRECI EC£ E3£ 64.£709.00. 90+ 9 £+ 2£, .30£0.10 0.P0 &0PP &P Pe& aPe. a ea TYPE n`TYPE E hPThdHToooYYri-i4rrwPcPfnn0ieEn E p s F£Uyt'Poo6s'DEpr &t. pem9''P qem9i ur((d sKKa fe rrlSSieaaatyNNnnqc dghu11H e e00i qn-. 23f(uci258 4ya1sA0AU lyip tr-))s1ye zt s)eP d2p3m&i"os?SP csnru,.o s"+ ai s etna. 6hdbr"o ePl eqrtrn auiwc ifanoeidtle riwet d£y he 9ieddge.tii9hxsse9tc preq oe nusredasw aiielnoicitttgncyhh
811 "; ,"v6 o0vi coWeic eAc oTciloT i l RReR.Mse. s.S.F r.Fe rqHe. rq 5 F63Hi/8MzH. uzFl trieFpqrle.e qR . AeRsrerpas pyt. o Dto2i s02cK0oHK zeH. tzcS.. eSnesn. s8. 98c9ßd. 8P. RPICREIC E£ 1£01.29.99,9 £1 £51 0 5P0& PP &ePa .e a. yrE asLyEttsrVatEecmLti vsCe e OstciN lvTePRrr iOcfienL i s£Ch5 o.t9mri9mb i.ne eaSscu hoi tna ob al e4 r0efopcr eP Hs&siP-ef.id mmoonuintot-r
10" 60 WATT R.M.S. Hi-Fi/Disco etc. ing plate, level control and cabinet input jack socket.
1 '/," voice coil. Res. Freq. 35Hz. Freq. Resp. to 1 5KHz Sens. 89dB. PRICE £16.49 + £2.00 P&P 85 + 85 mm. Price £3.99 + 40p P&P.
IPAJITIEI HfibOreB BpYr iKntIeTdS . cPirrocvueitn dboeasrigdn sa nidn clhuigdhin gq ugalalsitsy ' STEREO DISCO MIXER
components complete with instructions. STEREO DISCO MIXER with 2'+ 5 band L. &
FM MICROTRANSMI TER (BUG) 90/105MHz with very sensitive R. graphic equalisers and twin 10 segment
microphone. Range 100/300 metres. 57 x 46 x 14mm (9 volt) L.E.D. Vu Meters. Many outstanding features
Price: £8.62 + 75p P&P. 5 Inputs with individual faders pro-vi ding a
3 WATT FM TRANSMITTER 3 WATT 85/115MHz varicap controlled useful combination of the following:
professional performance. Range up to 3 miles 35 x 84 x 12mm 3 Turntables (Mag), 3 Mics, 4 Line .plus Mlc
(12 volt) Price:£14.49+ 75p P&P. with talk over switch. Headphone Monitor
SINGLE CHANNEL RADIO CONTROLLED TRANSMITTER/ Pan Pot. L & R. Master Output controls. Out-
RECEIVER 27MHz. Range up to 500 metres. Double coded modulation. put 775mV. Size 360 X -2 80 X 90mm.
Receiver output operates relay with 2amp/240 volt contacts. Ideal 'for Price £134.99 £3.00 P&P
many applications. Receiver 90 x 70 x 22mm (9/12 volt). Price:
£P&1P7 .8+ 27 5Tpr aenascmh.i ttSe.rA .E8.0 foxr c5o0m pxl ete1 5limstm. (9/12 volt). Price: r11.29 3 watt FM B. K. EL EC TRONI CS
T ansmitter ET;T
POSTAL CHARGES PER ORDER £1.00 minimum. OFFICIAL
ORDERS WELCOME, SCHOOLS, COLLEGES, GOVERNMENT UNIT 5, COMET WAY, SOUTHEND-ON-SEA,
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VISA/ACCESS/C.O.D. ACCEPTED. ESSEX. SS2 6TR TEL: [phone]
cit
ilius
i
INTERNATIONAL AUGUST 1986 VOL 15 NO 8
EDITORIAL AND ADVERTISEMENT OFFICE
1 Golden Square, London W1 R 3AB. Telephone [phone].
Telex 8811896.
MICROCOMPUTER- AIDED Paczuska says that electronics is a
major hazard.
CIRCUIT DESIGN 19
Julian Burt examines active
components and program overlay FIBRE OPTICS AND LASERS ... 27
techniques in this second Roger Bond rounds off with a
instalment of his series. round up of applications.
HARDWARE DESIGN
DANGER - ELECTRONICS AT CsON. CEPTS 30
.. -
There are no government health .B arwivsse , kicks CoOff n as us Iet arine s1- , aiminIVgII RtoC
warnings where the electronics get to the heart of microcomputer
industry is concerned, but Anna peripheral design.
Gary Herman: Editor
Ian Pitt: Deputy Editor PROJECTS
Paul Chappell: Project Editor
Jerry Fowler: Technical Illustrator
CPDaluaunsl csSaiftinea ndNy eSeiral:sl eoAsnd .E Mxeacnuatigveer JVeAffL VEM aPcRaEu -AlaMy PLgIoFeIEs R down th3e2 FDoIrG tIhToAsLe PwANhoE Lm MisEsTeEdR o ut on o4u1r
Andrew Selwood: Copy Control tubes. special offer, here's a DPM to
Dave Bradshaw: Group Editor build yourselves.
- Electronics INTELLIGENT CALL METER .... 36
Chris Ranklin's design will help
PUBLISHED BY: you with the rate data and the day UPGRADEABLE AMP 47
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TYPESET AND ORIGINATION BY:
Design International. DIGEST 7 rate joystick autofire; a low-cost
PRINTED BY: door alarm; a program cuer; a
TChOeV EGRaSrd eDnE SCIiGtyN PErDe ssB YL: td. speaker muting circuit and an
Argus Press Design. READ/WRITE 16 electronic odometer.
COVERS PRINTED BY:
Alabaster Passmore. A midi -sized debate about MIDI.
.
Member of the ETCETERA 62
ABC Audit Bureau CIRCUIT SOLUTION 52 Open Channel on the airwaves,
of Circulation Paul Wood's speaking alarm clock Playback hears the case for digital
Edaleyc itnr otnhiec sm Toondtha yp rise cneodrminga llcyo pveurb dliasthee. dU o nT hthee c ofirnstet nFtrsi- is a veritable treasure house of audio tape, we review one of the
of this publication including all articles designs, plans, circuit and software ideas. latest books and Alf sets another
dterallewcintugasl anpdr oppreorgtrya mrsig hatnsd tahlel rceoinp yrbigehlot nagn d too thAerrg uins- puzzle.
tShep ecLiaawlis to fP uCbolipcyartiigohnts aLnidm iotethde. rA ilnl treigllehctst ucaol nfeprrroepde rbtyy TECH TIPS 56
rtiiognhsts aarned bsyp veicrtiuficea ollfy inrteesrenravetido natol cAorpgyursig hSt pceocnivaelins-t This month's tips are for a variable CROSSWORD 66
Publications Limited and any reproduction reauires the
prior written consent of the Company. © 1986 Argus
Stapkeecni ailnis tth eP upbrelipcaatriaotniosn Lotfd thLei mAallg arezainseo ncaobnltee nctsa,r eb uist INFORMATION
the publishers cannot be held. legally responsible for
errors. Where mistakes do occur, a correction will nor-
mally he published as soon as possible afterwards. All
pceripcetesd abnyd u sd iant ag ocoodn tfaaiinthe da s icn oarrdevcet ratits teimmee notsf gaorine g atco- SUBSCRIPTION COUPON .... 11 PCB SERVICE 60
phreelsds .r eNsepiothnesirb tlehe, haodwveervteisre, rsfo nr oarn yth vea priuabtiloisnhse rasf fecactnin bge NEXT MONTH'S ETI 12 AD INDEX 62
ptiorince hoars acvloasieladb ifloitry p wrehsisc. h may occur after the publica- READER'S SERVICES 58 CLASSIFIED ADS 64
Subscription Rates. UK: £18.10. Over- PCB FOIL PATTERNS 59
seas: £22.50. USA: $29.50. Airmail:
£49.50.
ETI AUGUST 1986 3
TRANSISTORS
8F336/7 35 MPSA70 40 VN66AF 110 213708/9 10 2SC1963 80
WATFORD ELECTRONICS BF394 40 MPSUO2 58 V688AF 220 2N3713 140 2001957 80
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AC126/7 30 80337/8 12 BF494/5 40 MPSUO6 55 ZTX107 12 203772 105 2002028 85
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ETI AUGUST 1986
SWITCHES T DIP SWITCHES VERO IDC CONNECTORS MPEATNEERLS RELAYS 1
TOGGLE-. 25 250V ISPST) 4 way 650; 6 way 800: 8 way 8501 PHOTO DEC. ESC
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FRE only £24.95 it becomes a SUPERB WORDSTAR, FAST, DBASE2 etc, the PC2000 specification, at our prices, CANNOT
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LIMITED QUANTITY- DON'T MISS THIS OFFER!!! SURPLUS SPECIALS ON Join the communications revolution with our super
ONLY £24.95 OR £19.95 if purchased with ANY of our - - - range of DATA MODEMS, prices and specifications
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VCR or AUDIO VISUAL use. ONLY £99.00 + Carr.
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guarantee DSKC1 for 2HHor1 FH drive £29.95 +pp £4.00
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AC -DC Linear PSU for DISK drive and SYSTEM applications. Constructed on a HARD DISK DRIVES at give away prices!!
rugged ALLOY chassis to continuously supply fully regulated DC outputs of +5v DRE/DIABLO Series 30 2.5 Mb front load £525.00 QUME QVT108. Current product, state of the art
@pr o3t eacmtepds., 1-050v o@r 204.06v aAmCp sin pauntd. D+i2m4 v2 8@ x 51 2a.m5 pxs .7 Schmo rNt EcWirc u£i4t 9a.n9d4 overvoltage EDxIAchBaLnOg e4a4b/lDe RveEr4si0o0n0 £A2,9 5B. 500+.5 MMEb3 0fr2o9m P£S7U5 0£.0950. 00 t2e rpmaignea l RwAitMh, dTeVtIa c9h2a5b,l eH kaezyebltoinaer,d A, D1M2"S GA reeemnu slactrieoenns,,
Carriage on all PSU's £3.00 CDC HAWK5+5 Mb£795.00. CDC 9782 80 Mb RMO3 software setup, 25 x 80, Clock, Swivel and tilt base,
E4 4 `1It1rl ePtEcR TEC 03422 5+5 Mb £2£540905.0.000. PBOrinXtEerD pAoTrt ,A LFMuOncStiTo nH AkLeFys P RetIcC. E BORnAlyN £D4 2N5E.0W0 and
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A
ee+ s = = All prices quoted are for U.K. Mainland, paid cash with order in Pounds Sterling PLUS VAT. Minimum order value £2.00.
e«t; + + Minimum Cardordern0.00.Min¡mum BONA FIDE account orders from GovernmentDepts.,Schools,Universitiesand
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6 ETI AUGUST 1986
NEWS:NEWS:NEWS:NEWS:NEWS:NEWS:NEWS:NEWS
DIGEST Pocket -Sized
Digital
Multimeter
World's First Gallium
Arsenide Microprocessor The DM1000 digital mul-
timeter from AB European
Marketing is only a little larger
McDonnell Douglas have silicon equivalents but also oper- than a credit card and is light
developed what is claimed ate at many times the speed. enough to be carried around in a
to be the world's first gallium McDonnell Douglas say they are shirt pocket.
arsenide microprocessor chip. studying ways to improve the It features a 3'/ -digit 10mm
It can process information as speed of the new chip and hope high display, measures AC and
fast as conventional silicon to reach a target of 100 million DC voltages, resistance and con-
microprocessors can but uses operations per second. tinuity (but not current), and tery runs low. The continuity
only one- tenth of the power. Although a number of gallium comes with permanently- attached tester uses an audible warning
The MD2901 is a four -bit de- arsenide memory chips have test leads in a plastic wallet. Its device so that the operator can
vice which has been designed as been developed, the company maximum dimensions are 108 x concentrate on the item under
a direct substitute for existing say they do not know of anyone 54 x 8mm and it weighs less than test and not have to look at the
four- bit silicon microprocessors. else who has successfully built 80 grams. display, and there is also a diode
It occupies a one -eighth inch and tested a microprocessor Function selection is by means check function. Power is provided
square chip, contains 1860 tran- using the material. They are now of a rotary switch and the meter is by two LR44 long -life button
sistors"and uses just 135 milli - working on the development of a fully autoranging on voltage and cells.
watts of power. It will comple- 32 -bit microprocessor using resistance measurements with The DM1000 sells for f24.60
mentthe companys existing range gallium arsenide. maximum readings of 450V and plus VAT complete with case, bat-
of static random access memories McDonnell Douglas Ltd (Euro- 2M0. The most significant digit teries and instructions. AB Euro-
and gate array chips. pean Operations), Albemarle flashes to indicate over- range and pean Marketing Forest Farm
Gallium arsenide offers the House, 1 Albemarle Street, Lon- indicators on the display remind Industrial Estate, Whitchurch,
promise of computers which not don W1X 3HF, tel [phone]. the user which function has been Cardiff CF4 7YS, tel [phone]
only use less power than their selected and warn when the bat- 336.
32 -Bit RISC Chip From Acorn
external fetch and carry opera- The VL86C010 ARM is to be
tions, allows machines using manufactured by VLSI Technol-
A
corn Computers, Manufac- structions. It has an average RISC architecture to execute ogy Incorporated in San Jose,
turers of the BBC microcom- execution rate of four million code very quickly and efficiently California, under an agreement
puter and the Master series, have instructions per second, a two- (see the article on RISC in last with Acorn. The first samples will
introduced their much -heralded phase 8MHz clock and comes in December's ETI). The ARM has 25 be available in mid -summer at a
Reduced Instruction Set Com- an industry- standard ceramic internal 32 bit registers which par- price of $99 and full production
puter chip. leadless chip package. The asso - tially overlap, allowing fast inter- should be reached during the
Said to be considerably cheaper dated family of controller chips rupts to occur without the need third quarter of the year. VLSI are
than any other single- chip RISC currently includes devices for for time consuming shifts to store. also planning to make an evalua-
device, the new chip is com- memory, video, sound and I/O Acorn say the device handles tion kit available and Acorn will be
plemented by a range of optional operation and further ICs are high-level languages efficiently marketing a development system
controller ICs and will be available under development. and that it is particularly suited to cum evaluation kit.
towards the end of the year. The use of a small set of fun- use in situations which require Acorn Computers Ltd, Cam-
The VL86C010 ARM (Acorn damental instructions, coupled real-time response to external in- bridge Science Park, Newmarket
RISC Machine) is fabricated in with extensive use of internal terrupts and high processing Road, Cambridge, tel [phone]
CMOS and has only 44 basic in- registers to reduce the need for throughput. 411 extension 409.
Dual -Purpose Portable Iron
ingAnovel new tool from Camp- be used for most commonly- en-
Gaz International com- countered soldering operations
bines the functions of portable while the burner is suitable for
soldering iron and burner. removing paint from small objects,
Called the Spotflam, it consists releasing seized nuts and many
of a brass burner which screws more jobs. A patented device
onto a gas cartridge and a solder- allows the burner to be used at
ing bit which can be attached to any angle without flaring
the burner. The flame tempera- Recommended retail price of
ture is adjustable, giving up to the Spotflam isf9.95 and replace-
1800°C for burning and 400°C for ment CV360 gas cartridges cost
soldering and one gas cartridge f1.70 each. Camping Gaz (GB)
will last for up to five hours. Ltd, 126-130 St. Leonards Road,
The soldering attachment can Windsor, Berkshire, tel [phone].
ETI AUGUST 1986
I1AIiCOft1 (Dept.LeveEns. h7u.lm e1.8), Printworks Lane,
LTD. ,
Manchester M19 3JP.
ORDERS ABOVE £5 add £1.80 P&P + 15% VAT to all orders. Tel: [phone]
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74490 1:40 7415540 /.00 4569 1.70 MAN4640 2:00 ' BETyI1EE
NEWS:NEWS:NEWS:NEWS:NEWS:NEWS:NEWS:NEWS
I Can See and magneto -optical materials for
erasable, re -usable discs.
Clearly Now
A prize of £40,000 went to the
four scientists who invented the
liquid crystal light valve at Hughes
Aircraft in California. The LCLV
acts as a kind of optical transistor,
Eleven scientists from the USA, accepting light from a low inten-
Holland and Britain have been sity source (like a CRT) and using
awarded three joint prizes total- it to modulate a bright source (for
ling £115,000 for contributions to example, a xenon arc lamp) thus
the growing field of opto - creatinga high intensityversion of
electronics. The awards were made a low intensity image.
in early June by the Rank Prize The LCLV operates in real-time
Fund at a ceremony at the Royal and is the device behind the giant
Institution in London. screens used at pop concerts,
The prizes were awarded for sports meetings, for video con-
pioneering work in three major ferencing and in NASA astronaut
areas of opto -electronics: the in- training.
vention of compact and video A £30,000 prize was also awar-
discs; the development of large ded to four British researchers at
screen television displays and the the Royal Signals and Radar Estab-
design of thermal imaging lishment in Malvern and at the
cameras. English Electric Valve Co. who
Three Philips research scien- between them developed a highly
tists shared £45,000 for their in- portable thermal imaging camera
vention of the laser disc- initially used in fire -fighting, rescue work
as a video medium but increasingly and medical imaging.
thought of as an audio and data The Rank prizes were established
medium. Dr. P. Kramer, Mr. G. by Lord Rank just before he died
Bouwhuis and Mr. K. Compaan in 1972. They are designed to pro-
invented the laser disc in the early mote research in the two fields
Awards Off Course seventies. In his acceptance which most in-te rested him during
speech Dr Kramer observed that his lifetime nutrition (he was
his team had built on the work of president of Rank Hovis
Launched by component dis- entries not even up to the many predecessors and also indi- McDougall) and opto -electronics
tributors, Cirkit, in 1985 and co- standards of the intermediate cated that work was currently in (he founded the Rank Organisa-
sponsored by Texas Instruments category. The joint winners were progress on the use of crystalline tion film company).
and trade journal Electronics Times, Stephen Osborne and Howard -
the Young Electronics Designer Mitchell of Essex University with a While on the subject of prizes win (shame on you all!) and
of the Year Award is intended to netball scorer. Runners up were (see the other ariticles on this since the closing date for su-b mis-
encourage young designers and an 'electronic Lego' set and a page), the free PCB competition sions was the 2nd May we
promote the teaching of elec- rehabilitation aid to exercise the announced in our March issue don't suppose we will. However,
tronics in schools. Judging by the arms of stroke victims. has attracted a disappointing we've been working night and
standard of entries in this its The netball scorer won on number of entries. If you recall, day to rescue something from the
second year, the scheme seems marketability, thanks to a team of we asked readers to come up ruins, so watch this space next
none too successful. judges who -in cluded Peter van with designs for an original and month for a PCB special. By the
The award presentation for 1986 -Cu ylenberg TI's European head interesting circuit using the PCB way, the PCB is still available from
took place recentlyat Westminster and Jason Swift, electronics we gave away with our March our PCB service at its commercial
school and was introduced by correspondent of the Financial issue. So far, we have not received price.
Maggie Philbin, co -presenter of Times. any entries worthy of an outright
Ws Tomorrow's World and a The outright winners in the
somewhat less notable per- senior category received £500 in Drawing Fruit printer. Three standard track
sonality than last year's Duke of cash, a £450 a year sponsorship widths are available and the
Edinburgh. for the remainder of their course
First prize in the junior category of study, a vacation job with TI and pineapple Software, whose Dia - 0s.y1s"t egmri do. perates on a standard
was awarded to Gareth Arthurs a reserved place in TI's graduate 1 gram circuit drawing program A sample of the program's out-
(above) for a circuit to switch intake- in other words, theywon for the BBC micro is to be reviewed put is shown in the illustration,
bicycle lights between dynamo a job, which is not be sneezed at soon, have announced two new this being the component side of
and battery according to the out- these days. products, also for the Beeb. a double sided board.
put from the dynamo, preventing It was noticeable, however, that A utilities disc produced byone PCB retails for £85.00 plus
the lights: from being extinguished the overall standard of this year's of the company's customers pro- VAT (p&p incl.) and Diagram Uti-
when the cycle is at rest. Runners entries was poorer than that of a vides six additional features for lities for £10 plus1 VAT. Further
up were a wheelchair control well- constructed ETI project in the diagram package including details and programs may be
device and a thermometer for some respects and the scheme the ability to specify a border, to obtained from Pineapple Soft-
the blind. seems not to have mined the identify the screens in large dia-
ware, 39 BrownleaGardens, Seven
In the intermediate category same vein of talent that was evi- grams and to move diagrams either Kings, Ilford Essex IG3 9NL (tel:
(15 to 18), the winner was Tim dent in last year's crop of entries. horizontally or vertically to make 01-599 1476).
Price with a sound processor It may be that ETI readers could more space.
using a 16 -bit MPU, 128K of RAM do better. Certainly, they are wel- Pineapple also ann-o unced a
and 12 -bit conversion ICs. The come to apply even if not at pre- PCB drawing program supplied
runner up, and only female finalist sent in full-time education. en a 16K EPROM and capable of !
was Rosemary Erskine with a digi- Entry forms for 1987 can be handling double sided boards up
r.4J.
tal anemometer. Third prize went obtained by writing to: to 8" x 5.6" in size. PCB (as the ÌjLj: 4..L
to a stage lighting controller for Carla Sharyk, Young Electronics package is known) operates with
the BBC micro. DesignerAwards, Standard House, any BBC B compatible computer
The senior category was the 16-22 Epworth St., London EC2A with a disc drive, medium resolu-
most disappointing with many 4SH. tion monitor and Epson FX-type L :
ETI AUGUST 1986 9
MULLARD UNILEX AMPLIFIERS OVER 400 GIFTS
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CAR STARTER/CHARGER KIT
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50. 2 -12V DC or AC, 3 CO relays 2P17 -2 rev pr minute mains driven motor with gear box, ideal to operate mirror
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293. 50 let n diodes nerd unmarked MINI MONO AMP on p.c.b. size 4" x 2" (app.) they are new and still in maker's boxes.
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301. 10 ceramic sonnets Mulled 1" x 3/8 x 5/16 with the amp. Brand new, 11. 24 x 8 ft 85-120 watt warm white tubes. Ideal plant growing.
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3113. 1 round pin kettle plug with moulded on Ned & B/Card orders accepted. Brighton 0273 734648. Bulk receivers.
orders: write for quote.
10 ETI AUGUST 1986