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I PRODUCT SHOWCASE I 100 watt audio amplifier module Although this amplifier module from A-One Electronics is labelled as a "lO0W pure class A main amplifier", it is technically a class AB amplifier judging from the size of the heatsink and the fact that it has a single 2A fuse. In fact, the circuit information gives details of how to set up the quiescent current. The resultant current of 600 milliamps is much higher than the usual 50-lO0mA one would expect for a typical class AB design and will effectively give class A operation up to about 1 watt RMS into an 8-ohm load. Recommended supply voltages range from ±30V to ±42V although maximum power will naturally be reduced at the lower voltages. A suggested layout of two modules in a stereo amplifier has fan cooling which would be mandatory in view of the standing dissipation ofup to 48 watts in each channel. The module is well made and has a complementary differential amplifier in the input circuit and MS15003/4s as complementary common emitter Digital recorder/ announcer Kingray video combiner amplifier This very handy device is incorrectly named which must cause a lot of confusion to potential buyers. It does not amplify or combine video signals. What it does do is combine the signal from a VHFI UHF antenna with the modulated RF output signal from a VCR. The combined signal is then amplified and fed to a 4-way splitter. Tlie effective gain at each of the four outputs is +6dB, referred to the antenna input. If it was correctly named, it would perhaps be called a "VHF/ UHF/VCR combinei-/splitter" which is still a mouthful and possibly just as confusing to the uninitiated. What the Kingray SA214V does do is enable you to watch off-air programs or tapes from your VCR on four TV sets in 74 SILICON CHIP stages (ie, not emitter followers) in the output circuit. The 100W module(CatS0313) is available for $79 from A-One Electronics Pty Ltd, 432-434 Kent Street, Sydney 2000. Phone (02) 267 4819. your household. It is powered from a 9V DC plugpack which is connected to one of the 75-ohm output sockets via their PSK0l power adaptor. This is supplied together with the 9V plugpack. As such, the SA214V is a very useful accessory and one which will find use in many households with more than one TV set. We're pleased to report that the SA214V is manufactured in Australia and appears to be very well made. The unit is available from David Reid Electronics at $99.95. The MOH330A digital recorder announcer from Eletech uses CVSD compression to provide good quality audio record/play from a compact desktop machine. Originally designed to replace on-hold signal devices such as tape recorders and radio sets, the MOH330A recorder has many other applications. Due to its solid state design with no moving parts the unit is ultra reliable. Good quality speech or music can be recorded on the device using a microphone or the line input. A VU meter displays the record and playback levels. One or two messages can be stored with lengths of up to four minutes and eight seconds. Connections to the unit are via standard audio connectors or phone jacks. An external control can start the playback for use in talking signs, security messages, fire warning systems, etc. For further information contact Zenology Sales Pty Ltd, 7/245 Springvale Road, Glen Waverley, Vic 3150. Phone (03) 802 0599). First High-Speed IEEE 488.2 Controller for Notebook PCs New concept in handheld logic analysers IOtech The "LogicBridge 136" is a new concept in logic analysers. Handheld and battery powered, the LogicBridge performs as an intelligent 3-channel logic probe, yet is also able to store and display waveforms like a logic analyser. Basically it is a dedicated logic instrument for those involved in the design, repair or maintenance of digital electronic circuits and equipment. Fast waveforms can be easily identified by taking a "logical snapshot". Not only can this save hours of lab work but with such a facility, data can be retrieved from memories for later review and analysis. The waveforms are viewed and measured on a high resolution LED display which simulates binary level signal/channel traces as displayed on a logic analyser's CRT. The effective real time bandwidth of the Model 136 is 10MHz but the glitch catcher function allows the capture of pulses down to 50 nanoseconds. The unit may be operated in real time or memory mode. Memory mode allows for the acquisition and storage of up to 100-bit sequences. Waveforms can then be recalled, visually or logically compared (AND, OR, EXCLUSIVE OR) to incoming waveforms or fed to an external source via a serial port. Up to 12 consecutive memories (two waveforms each) can be automatically linked together to store long data sequences. Being a dedicated instrument, the LogicBridge 136 has a range of useful digital debugging, signal identification and tracing facilities. In addition, the audio output may be used for indicating an occurence of trigger and for The Personal488/NB is a compact external IEEE 488.2 interface that enables 170 Kbyte/s IEEE 488.22 control of up to fourteen IEEE instruments from a notebook PC via its parallel port. A virtual PC plug-in board in terms of speed and performance, the Personal488/NB is compatible with both IOtech 's DLL driver for Microsoft Windows and with its DOS subroutinestyle and device driver software. The Personal488/NB also supports third-party data acquisition software packages, such as DADiSP and Labtech Notebook. The Personal488/NB uses FPGA (field programmable gate array) technology to permit simultaneous instrument-control and printer transactions via its connection to a notebook PC's parallel port. The unit can draw power from a notebook PC's keyboard port, a 7 to 15 VDC voltage source, or a standard A/ C voltage source via an included power supply. Portable and Remote Applications. As notebook PCs decrease in price and increase in functionality and power, many engineers are finding them practical, easily transportable alternatives to cumbersome desktop PCs. The Personal488/NB enables engineers to use notebook PCs in IEEE instrument control and data acquisition. It is well suited for vehicle testing, such as aircraft and automobile testing, where physical space is at a premium, and is also ideal for users who require a portable computer, such as test-instrument sales engineers, who can now use notebook PCs to demonstrate IEEE 488 instruments on customer calls. The Personal488/NB is also useful for engineers who need to analyse acquired data away from the test site because it enables the same notebook PC to be used both on-site for data acquisition, and in the Jab for subsequent data analysis. This eliminates the time-consuming data transfer processes and cross-platform incompatibility problems sometimes associated with using one desktop PC for testing and another for analysis. SCIENTIFIC DEVICES AUSTRALIA PTY LTD ~ Melbourne Fax Sydney Fax Adelaide Fax (03) (03) (02) (02) (08) (08) 579 579 344 349 281 281 3622 0971 5200 2602 3788 4194 Product names listed are trademarks of their respective manufacturers' company. FEBRUARY 1993 75 actual waveshape identification. For further information, contact Emona Instruments, PO Box K720, Haymarket, NSW 2000. Phone (02) 519 3933. . . . .. .,. ,...... "' ......... ,. . ............ . . . .. . . .. . . .. " ' ... 4"."-¥ .... «". ...... .> .. ' ......... . .i ... " ,. ~ j .. "' .. " ........ "' ••• • 1ii ......... • If " ..... " . ;jt • •••• . .... . .... " a • • ♦ • • • • • Handy breadboard for small prototype circuits If you want to wire up a circuit with just a few ICs these little prototyping boards are quite handy. They have 29 columns of terminals and so you could insert three 14-pin ICs and one 8-pin IC, or other combinations to take up the space. The board has double-sided foam tape on the back so it can be conveniently mounted on a metal plate and it also comes with a handy little pad of wiring sheets so you can record your layouts. All this costs just $5 .95 (Cat. P11002) from Rod Irving Electronics, 74 Parramatta Rd, Stanmore, NSW or interstate branches. Solar powered musical keychain from Rod Irving Electronics This little keyfob is a bit of a gimmick. When its solar cell is exposed to strong light it plays "Somewhere Over The Rainbow" al though we suspect that noone will be tempted to sing along with it. More useful is the integral lamp which can be lit by pressing the button - handy for finding keyholes in the dark. The unit is completely sealed so we have no way of knowing whether it has an internal cell or not._At the price of only $4. 95 it is quite a useful device. But try to keep it out of sunlight if you don't want to hear that tune again. The solar keychain (Cat. Z19060) is available from all Rod Irving Electronics stores. Philips 21-inch high-resolution computer monitor ANTRIM 'TOROIDAL TRANSFORMERS • Now made in Australia. • Standard range 15VA co 2kVA. • Large ex-stock quantities available. • Competitive pricing available for OEMs & resellers. • Simply the best transformers all round. HARBUCH ELECTRONICS PTY Lm 90 George Street, Hornsby NSW 2077. Telephone (02) 476 5854. Fax (02) 476 3231. 76 S ILICON CHIP Philips has introduced a 21-inch model in its highperformance Brilliance monitor range. The Brilliance 2110 is an autoscan colour monitor that supports resolutions of up to 1600 x 1280 and an extended horizontal scanning frequency range of up to 82kHz. T,rnse high refresh rates are essential to obtain a stable, flicker-free display with such large screen sizes. . The high resolution and display quality of the Brilliance 2110, together with its extensive digital adjustment facilities, make this monitor an outstanding choice for the mos,t demanding applications in areas like CAD, graphic design, DTP and professional pre-press work. Microprocessor-based digital control of all display parameters ensures secure and reliable setting-up. Handling a wide range of display modes is made easy by a IAN J. TRUSCOTT'S ELECTRONIC WORLD 30 Lacey Street, Croydon, 3136. Phone (03) 723 3344; Fax: (03) 725 9443. Now also at: 200 Smith Street, Collingwood. Phone (03) 419 8208 Mail & Credit Card Orders Welcome We now have a range of 5,6,8,9 & 10 pin Ask about our range of E.A.O. precision resistor networks and a comprehensive push button switches, motor start range of micro's and eproms at ridiculous capacitors and Beckman Industrial prices. Quote this ad and receive another multimeters. 5% discount. $l6.80ea. 27C010-15 1 meg eprom 150ns..... $8.IOea. SAB8031 P Romless Micro ........ 2.50ea. MAB8049H Romless Micro ....... $2.50ea. 62256-LP S-Ram ..................... $9.75ea. 41256 D-Ram ................................. $2.60ea. 27C020-15 2 meg eprom 150ns.... FEBRUARY SPECIAL: BECKMAN DM 15XL Multimeter $119 $10.00 ea. 3mw Laser Tube & inverter $99.00 ea. 6 volt 1 watt Solar Panels Infra Red Night Viewing Monocular (kit) $269.00. COMPONENT PHONE ORDER HOTLINE (03) 723 3344 ON SALE NOW First edition Vintage Radio Calendar, in full colour. Featuring a selection of Australia's most photogenic radios. Ideal Christmas gift for friends and .collectors overseas. Available from Resurrection Radi CREDIT CARDS ACCEPTED 51 CHAPEL STREET, WINDSOR, VIC. 3181. PHONE (03) 529 5639. FEBRUARY 1993 77 choice of 22 preset modes; 14 factory preset and the other 8 user-definable. The Brilliance 2110 automatically recognises the horizontal and vertical scanning frequencies of the graphic card to which it is connected, and selects the corresponding display mode. Different modes can be manually selected if desired. Precision colour-matching provides a choice of three colour temperature modes: standard 6500K or 9300K settings, or a user-definable mode with .individual RGB adjustment. This function allows a desired colour balance to be achieved with digital precision; an important benefit in applications where critical matching of external colour references is needed. Also newly introduced is a 20-inch monitor (type number C2082-DAS) fitted with a Trinitron slotted shadowmask tube. This model meets the preference of some users who prefer the Trinitron tube. Other facilities and performance aspects of the C2082DAS are virtually identical to those of the Brilliance 2110, except for the maximum resolution of 1280 x 1024. Distributed in Australia by Clear Technology, the Philips Brilliance 2110 retails for around $5,999 including tax and the C2082-DAS for $5,160 including tax. For further information, contact Philips Components, 34 Waterloo Rd, North Ryde, 2113. Phone (02) 805 4455. 20V/20A power supply with variable output If you want lots of current at up to 20V DC this power supply module is an easy way to get it. The module is completely built and tested; all you LD9000 LP gas leak detector The LD9000 LP gas leak detector is manufactured in Brisbane and uses a "Figaro" sensor. Gas presence is indicated both by an audible alarm and by flashing red lights in the display panel. Red lights also indicate "ON" and "charge". have to do is mount it in a suitable chassis with fan cooling and connect a suitable large power transformer. Essentially, the circuit is a simple series regulator with five TO-3 power transistors connected in parallel to share the output current. At first sight, there appear to be eight power transistors on the large heatsink but two of these comprise the full wave rectifier diodes while the other transistor is Sony's CCD-TR805E camcorder - ctd from page 15 is in telephoto mode. However, such a demonstration really does not show how effective the system is. When Sony released the TR-805E onto the Australian market, they demonstrated the effectiveness of the "steady shot" system by mounting the unit on a motor driven vibrator. With the "steady shot" system switched off, the picture was completely obliterated by the image blurring; with "steady shot" switched on, the picture was normal - a dramatic demonstration. 78 SILICON CHIP With such a plethora of features on a small camcorder, you might wonder whether it is too much for the average user to comprehend. No doubt it is but the beauty of the TR-805E is that you can use as many or as few of the features as you want and just ignore the others. It can be used very simply just by letting the machine do everything automatically or you can intervene as much as you like to get the precise recordings you want. Either way, the results are very good and potentially better than can be The unit is supplied with two battery chargers, one for 240VAC operation, the other for 12VDC from a cigarette lighter outlet. Four rechargeable batteries are fitted inside the unit and these provide up to six hours operation. For further information contact David Hall Electronics, 3/376 Kingston Road, Slacks Creek, Qld 412 7. Phone (07) 808 2777. the driver for the five output devices. The circuit has selectable current limiting as well as short circuit protection. The module appears to be well made and the components are certainly rated for the high current output. It is available at $134 (Cat. SO 005) from A-One Electronics Pty Ltd, 432-434 Kent St, Sydney 2000 Phone (02) 267 4819. SC achieved via any ordinary PAL monitor - you need an S-video monitor to get the best results. In summary then, the Sony CCDTR805E camcorder is a most impressive unit incorporating a host of features, some of which weren't even thought of a few years ago or were only previously available on top of the range units. Recommended retail price of the CCD-TR805E is $2999. For further information, contact your local Sony retailer or Sony Australia Pty Ltd, 3339 Talavera Rd, North Ryde, 2113. Phone (02) 878 9712. SC