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PRODUCT SHOWCASE sy-chain other devices. This drive, which has a 64K buffer, is mainly intended for Apple Macintosh users because it can be plugged straight into their standard SCSI port and it's ready to go. For further information, contact Multimedia Technology on (03) 859 7105 or Panasonic Australia on (02) 986 7400. Low cost frequency synthesizer Panasonic CD-ROMs now available Panasonic expects that its CD-ROM disk drives will capture a significant percentage of the rapidly growing CDROM market in Australia. The range comprises several models, all featuring fast access times of 290ms. They are available in AT-BUS or SCSI formats and can be built-in or stand alone. Panasonic currently employs a caddy system but it expects to release traytype CD-ROMs later this year. The biggest seller of the current range is the CR-522-B internal AT-BUS drive. It can be easily installed into a spare 5-1/4" floppy disk bay. It is connected from the power supply and a 40 wire cable runs to either the controller card or directly to the sound card. The CR-522-S is designed as a stand alone unit, for those situations where a computer's power supply is inadequate to support another peripheral. It has a 64K buffer. For applications where more than one CD-ROM drive is required, Panasonic markets the model CR-501 which allows up to seven drives to be linked together in a daisy chain. External SCSI model, the Panasonic CR-501-S, has a separate power supply as well as the abililty to dai- Giant digital bargraph display Amalgamated Instrument Co. has announced the release of a new extra large digital bar graph display. Designated the model LD4-574BG, it features high visibility and high brightness 57mm LED digits which are readable from at least 25 metres away. The LD4-574BG is suitable for monitoring any industrial variable where a graphical representation as well as a digital display is required. Strain gauge, pressure transducers and load cells, 4-20mA, 0-1 volt, 0-10 volts, BCD, binary and frequency make up part of the large 86  Silicon Chip range of input types available. Analog input models are available with an inbuilt alarm relay output. For further information contact Amalgamated Instrument Company on (02) 476 2244. Capable of ultra-wide frequency synthesis, the FSC-30 and 50 are half length cards for any PC-XT/AT/386 and provide one or to two independent TTL level programmable square wave generators, at low cost. Both models come with one or two synthesisers per card, with each channel being independent of the other, and crystal controlled for excellent stability. An optional external reference input is also available, with reference source then being jumper selectable between external or on board frequency source. Software supplied with the cards provides either command line or popup menu selection of output frequency. Driver software is also supplied, with source code, for writing custom programs and an example program is included. The FSC-30 has a range of 0.024Hz to 30MHz while the FSC-50 has a range of 2.98Hz to 50MHz, with resolution for both being 27,000 steps per decade. The cards have three switchale addresses, for multiple card use, and are connected via 50W coax with BNC connectors. For further information, contact Boston Technology Pty Ltd, PO Box 1750, North Sydney, NSW 2060. Phone (02) 955 4765. Scratch remover for compact discs Harald Schmid, an inventor in Ludwigsburg, Germany has produced a kit that allows the removal of scratches from compact discs by grinding down a portion of the outside plastic shell with a specially designed sandpaper. It sounds fiendish but it is claimed to work. Despite claims that compact discs never wear like vinyl plastic records, scratches on the disc's transparent coating can interefere with the process of reading the recorded data. The result is that damaged or scratched CDs can cause players to mistrack, mute or skip. Several companies have begun marketing disc repair kits that usually include polishing and cleaning materails. Mr. Schmid's kit goes a step further by including several grades of sandpaper and guidlines for removing even fairly deep scratches. Trackmate Australia Pty Ltd, manufacturer of audio, video and computer care products, is distributing the CD repair kit in Australia. Suggested retail price of the Trackmate CD repair kit is $29.95 and it is available at all Tandy stores and selected hifi retailers. For further information, contact Trackmate Australia Pty Ltd on (02) 973 1807. Re-inking service for printer ribbons Inverell Technology Centre has introduced its new ultra high speed fabric ribbon re-inking machine. Up to now it has not been possible to accurately re-ink ribbon cartridges and these would usually be thrown away. Utilising microcomputer technology, the system can accurately re-ink the majority of fabric ribbons of any physical shape or size at speeds of up to 1 metre per second with ink densities accurately controlled. A single joystick controls all major functions of the machine to allow single handed operation. Direction of ribbon travel is automatically sensed and set, completely eliminating the need to set up motor directions. With this type of system, the most delicate ribbon cartridge may be inked as easily as the largest type available. Once the speed and pressure settings of a particular type of cartridge are decided, they can be saved in a memory and recalled later instantly. Single colour ribbons can be inked as successfully as black ribbons, and bulk rolls may be inked with an optional roll carrier. The machine can re-ink almost all dot matrix fabric printer ribbons typically at a cost of $4.50 to $9.50. Some very large ribbons are up to $30.00 each. As a general guide, ribbons are 40% of the new retail price. Quantity discounts for bulk orders are applicable, and freight is free both ways for orders over $45.00. Ribbons in lots of ten may be sent post free to Inverell Technology Centre, Reply Paid 22, 86-88 Ring St, Inverell, NSW 2360. Phone or fax 067 21 0200. CEBus AUSTRALIA KITS CEBus Australia has opened the Circuit Cellar door to bring you a range of high quality, educational electronics kits. There are three types of kit available: an Experimenter’s Kit which includes the PCBs, manuals, any key components that are hard to find and the basic software required by the finished product. Then there is the Complete Kit which includes everything above plus the additional components required to complete the kit. Finally, there is the complete kit with Case & Power Supply. Regardless of which kit you purchase you get the same high quality solder masked and silk screened PCB and the same prime grade components. Our range of kits includes: HAL-4 4 Ch, EEG Monitor, Complete kit only ................... $356.00 Experimenter’s Kits: SmartSpooler, 256K print spooler ..................................... $214.00 IC Tester, Tests 74xx00 family ICs .................................... $233.00 Serial EPROM Programmer, For 27xxx devices ............... $214.00 Ultrasonic Ranger Board with Transducer.......................... $194.00 NB: The above prices DO NOT include sales tax. Don’t forget we also have the HCS II, Home Control System, available, Its features include: Expandible Network, Digital & Analog 1/O, X-10 Interface, Trainable IR Interface and Remote Displays. Call fax or write to us today for more information. Bankcard, Mastercard & Visa accepted. CEBus AUSTRALIA. Ph (03) 467 7194. Fax (03) 467 8422. PO Box 178, Greensborough, Vic 3087. November 1993  87 VCR as the second tuner, and feeding the VCR video into one of the PIP video inputs. Imagine being able to transmit this around your house using one of your TV transmitters! The Dynalink PIP decoder, will be available, initially in limited quantities At $595. Cat # T1800 For further information contact AVComm Pty. Ltd., PO Box 225, Balgowlah, NSW 2093 Phone (02) 949 7417 or fax (02) 949 7095. TOPFET devices from Philips Picture in picture adaptor Have you ever wanted to monitor your favourite satellite channel whilst watching commercial TV? Now there is a way of doing it. The DYNALINK picture in a picture decoder, allows you to view commercial TV, whilst monitoring your favourite satellite channel, by superimposing the satellite picture in any corner of your TV screen. When something interesting comes on your satellite channel, you just press the SWAP button, and the 2 pictures are transposed, allowing you to view your satellite channel, whilst monitoring the commercical channel. The Dynallink picture in a picture decoder comes with its own remote control unit, has an inbuilt TV tuner and output modulator, has 3 video and audio inputs. The PIP channel has its own audio output, which can be fed directly into your Hi Fi system. Of course, the unit can be also used for 2 commercial channels, by using the inbuilt PIP tuner, and your present With the introduction of the BUK105-50L/S, Philips Semiconductors has extended their 3-pin TOPFET (Temperature and Overload Protected Field Effect Transistor) range with 5-pin versions. This second generation can be used as a general purpose switch for lamps, motors, heaters and solenoids in automotive and other 12-volt systems where protection of the switch and fault condition notification are required. In addition to switched operation, the BUK105- 50L/S can be used in linear mode, without loss of protection. The BUK105 can protect itself from over temperature, caused by overload Coming next month* in Silicon Chip 25 watt hifi amplifier module This neat little module uses just one monolithic power chip in a five-lead package to deliver 20 watts RMS into 4W or 25 watts into an 8W load. The module can be built to suit single or dual supplies and it is protected against short circuits and overloads. It has surprisingly good performance figures and the overall component count is low. You could use it to replace the amplifier modules in an old amplifier or as the basis for new equipment. Build an AC impedance meter Also to be featured in the coming December issue is an AC impedance meter especially designed for PA system installers. It can be used to test transformers, 70V and 100V PA lines and resistors. It has three ranges and a digital display. Stroboscope for speed measurement Most readers are familiar with strobe lamps in discos and stroboscope used to measure the speed of rotating machinery but this design eliminates the dangerous high voltage supply required for the Xenon dischaarge tube. Instead, it uses a brace of high brightness LEDs and a simple power supply. * Although these articles are planned for publication, unforeseen circumstances may change the final content. On sale, 24th November. 88  Silicon Chip or shorted load, and from overvoltage transients. An over temperature will trip a latch in the device which sets the flag and can turn off the MOSFET by discharging the gate. The latch will remain tripped until it is reset by means of the protection supply pin. An overvoltage transient will cause an off-state device to be turned on, clamping the voltage to a safe level. The new device has a vertical power DMOS output stage which features a low on-state drain-source resistance of .05W, a continuous drain current of 29 amps (120 amps peak) and a total power dissipation of 75 watts. For further information contact Philips Components, 34 Waterloo Road, North Ryde, NSW 2113. Phone (02) 805-4455. Visual Basic software Azonic, republisher for Merlin Development Pty Ltd, has announced POWRRR Chart/VB, an Australian developed software for Microsoft Visual Basic developers. POWRRR Chart/VB gives the Visual Basic developer access to charting and presentation graphics capabilities. Included in the software is stylesheet based charting, a file manager/ viewer, a complete illustration package for annotation of charts and hundreds of ClipArt samples to assist the Visual Basic developer to produce a professional paackage. POWRRR Chart/VB requires Windows 3.1, Visual Basic 2.0 or higher, a 386 computer or higher, VGA graphics or higher, 4MB RAM, 4MB available disc space and a mouse. Orders can be placed now at an introductory price of $295 from Azonic Pty Ltd. Phone (02) 878 4444. Education directory on CD-ROM Acorn Computers has released the fourth edition of its education directory. Over 2000 educational titles are listed. This allows the user to browse through the data files, searching for key words or companies or particular types of software. By keying buttons on the display the user gains access to linked pages of information which may contain screen shots, demonstation versions of the software, or further information on particular packages. The CD-ROM version of the directory is available free of charge to schools, directly from Acorn. For further information, contact Peter Revell, Acorn Computers Australia Pty Ltd, 12 Gipps Street, Collingwood, Vic 3066. Phone (03) 419 3033. TDK announces DCC tapes Send Postage Stamp For List Of Other Items Including Valves L.E. CHAPMAN TAPE DECK OR RADIO POWER LEADS Plugs and Sockets $1.50 Test prods and leads $1.50 TOUCH MICRO SWITCHES as used on TV sets. 4 for $1 TRANSISTOR EAR PIECES plug & lead 4 for $2 PUSH BUTTON SWITCHES 4 pos 50c SPEAKER TRANSFORMERS 7000 to 15/Ohm 5W $10 7000 to 3.5Ohm 15W $10 5000 to 3.5Ohm $10 SPEAKERS 5 x 7 $5    6 x 4 $4 5" 8 Watt $5 VIDEO & TV SERVICE PERSONNEL TV & VIDEO FAULT LIBRARIES AVAILABLE AS PRINTED MANUALS $90 EACH + $10 DELIVERY BOTH MANUALS VIDEO & TV $155 + $15 DELIVERY OR AS A PROGRAM FOR IBM COMPATIBLES $155 + $10 DELIVERY INLINE FUSE HOLDERS 4 FOR $1 SHIELDED LEADS 7ft 3.5 to 3.5 $1 3.5 to 6.5 $1 6.5 to 7ft 75c Inline Baynet Plugs & Sockets 4 for $1 SHIELDED CABLE 10m $2 TAG STRIPS 10 for $2 mixed FOR MORE INFORMATION CONTACT TECHNICAL APPLICATIONS FAX / PHONE (07) 378 1064 PO BOX 137 KENMORE 4069 50c 50c $1 ea 50c 10 for $1 $1 ea 3 for $1 3 for $1 $1 ea 5 for $1 3 for $1 4 for $1 10 for $1 5 for $1 4 for $1 IC SOCKETS 16 pin * 24 pin * 28 pin Four for $1 PLUGS & SOCKETS R.C.A. plugs and sockets 50c pair 2.5mm sockets 4 for $1 3.5mm sockets 4 for $1 6.5mm sockets 4 for $1 Thermistors 4 for $1 Speaker plugs and sockets 4 pin 50c pair 2 pin 50c pair POTS 1/2Meg $1.50 Dual 2 Meg Ganged Lin $2.00 1/2 Meg Switch $2.00 Dual 1 Meg Ganged Lin $2.00 1 Meg $1.50 1 Meg Dual Ganged Log $2.00 1 Meg Switch $2.00 10k Ganged Log $1.00 25k Dual Ganged $2.50 50 Ohm Single 50c ELECTROS 20UF 450V 2000UF 25V SLIDE POTS 1/2 Meg dual 1 Meg Dual 1 Meg Dual 1k Dual 25k Dual 5k Single 250k Single 10k Single $1 $2 $2 $1 $2 50c 50c 50c SPECIAL 12 Mixed Switches TWO WAY SPEAKER CROSSOVER NETWORK $2 TDK have announced the release of their DCC tape to the Australian market. Available in two record/ playback times, DCC-XG60 (60 minute) and DCC-XG90 (90 minute), the tapes are priced at $13.95 and $15.95 respectively. For further information and the address of your nearest TDK SC dealer, ring (02) 437 5100. SPECIAL PICK UP ARM Includes cartridge and stylus. Plays mono or stereo $15 5 MIXED ROTARY SWITCHES 5 for $2.50 Special TUNING CAPACITOR 2 gang covers all Aust. AM bands. $10. P&P $1.80 for one or two. CAPACITORS 6N8 150V 1000uF 16V 1000uF 50V 0.0039uF 1500V 0.0068 250V 47uF 63V 47uF 160V 470uF 16V 47uF 200V 0.1uF 250V 680uF 40V 0.027 250V 10uF 25V 22uF 160V 0.039uF 400V SPECIAL Dual VU Meters $4. P&P $1.80 for one or two $1.50 $1 $4.50 200 MIXED SCREWS self-tappers, bolts, nuts etc. 200 for $2 CAR RADIO SUPPRESSORS 4 for $2 OXTAL VALVE SOCKETS $1 each Stick Rectifiers TV20SC $2 Transistors AD61-62 pair $3 AD 149 $2 each Chrome 1/4" push on knobs RRP 1.20 EA 10 for $1 Mixed capacitors fresh stock 100 for $2 Mixed resistors all handy values 100 for $2 Slide pot knobs 10 for $1 1F 455kHz for valve radios $2 ea Telsco Microphone Ceramic $2 pp $1 SPECIAL: CELLULAR HORN TWEETER Mounting specification 12.5cm x 7.1cm. Frequency range 2000-20,000Hz. Sensitivity 105dB. Maximum power 30 Watts. Impedance 8 ohms. $12. TV CRYSTALS 4.43619kHz 03061 NDK; 8.867238kHz 03122.937 $2 each. VALVES 6K7 $10 6U7 $10 6V4 $7 6BL8 $7 6SA7 $10 12AX7 $10 6BQ5 $10 6AV6 $10 6SN7 $10 EF50 $7 6K8 $12 1S5 $7 6BM8 $10 5AS4 $10 IT4 $7 6AM8 $10 6SL7 $10 205A $10 12AT7 $10 6J5 $10 6AS6 $10 6AN8 $10 6005 $10 12DL8 $10 6136 $10 12BL6 $10 6X4 $10 6SL7 $10 12X4 $10 6BE6 $12 6V4 $8 6M5 $12 EM84 $12 IR5 $10 6LEA8 $10 6N8 $12 6BV7 $10 6EM7 $10 6AU6 $10 12AU7 $10 6LM6 $10 EF86 $10 6X9 $10 6BAL6 $10 152 $5 6AQ5 $10 122 Pitt Road, North Curl Curl, NSW 2099 Phone (02) 905 1848 Send Postage Stamp For List Of Other Items Including Valves November 1993  89