Inset shows this month's feature project: an easy -to -build digital clock/thermometer. #Epson wf 3520 ink cartridge replacement but not printing tvOn the cover Entertainer Kerry Woods demonstrates Sanyo's new "Colour Television Blackboard" - a unique TV receiver that also allows the user to paint colour pictures on -screen using an electronic "brush" (details p24). COMING NEXT MONTH! - Find out what's coming by turning to p25. #Epson wf 3520 ink cartridge replacement but not printing seriale" *PHOTON TORPEDO C FEATURES THE TANTALISING QUEST FOR GRAVITY WAVES Testing Einstein 12 BRITAIN LOOKS TO ROBOT TECHNOLOGY A matter of economics 20 SANYO'S ELECTRONIC COLOUR BLACKBOARD Video graphics for everyone & 25 YEARS AGO Interesting snippets from the past 26 HIFI, VIDEO AND REVIEWS AUDIO/VIDEO ELECTRONICS Pepper Studios: modern facilities, period setting 32 HIFI REVIEW Ortolan moving magnet & moving coil phono cartridges 38 VENTED SPEAKER SYSTEMS PT 2 Designing practical enclosures 90 PROJECTS AND CIRCUITS DIGITAL CLOCK AND THERMOMETER What you've been waiting for 42 PHOTON TORPEDO GAME A low-cost alien exterminator DIGIT UNIVERSAL TIMER/STOPWATCH For yachting & rallying 60 SUPER -80 DO-IT-YOURSELF COMPUTER The construction details 70 MICROCOMPUTERS COLUMN 80 Serial communications and RS -232C ports 120 CENTRONICS PRINTER INTERFACE FOR THE TRS MICROCOMPUTER NEWS & PRODUCTS FORTH for the Sorcerer 130 O Fancy yourself at electronic games? "Photon Torpedo" is a low-cost alien exterminator that will keep you amused for hours! See p50. As a bonus, you also get a versatile 4 -digit alarm clock. ![]() 9 September, 1981 AUSTRALIA'S HIGHEST SELLING ELECTRONICS MAGAZINE Digital Clockl Thermometer Ys DIGITAL p.00nrherncnf TEN Here's a project that many readers have requested - a digital thermometer with d big, bright display. STEREO HEADPHONES Rģ a 1 o 11111~1J 11 Volume 43, No. And know that you're hearing every nuance of the original r recording from deep bass to the highest treble. MDR That means -7 you can listen to the heaviest of music for hours. And a new high -compliance diaphragm accurately reproduces the 20 to 20,000Hz bandwidth and improves low -range response. ![]() #Epson wf 3520 ink cartridge replacement but not printing driverJP The MDR series headphones' airy spaciousness delivers absolute clarity through an ultra -small driver AP3528 unit that produces more than three times the energy of conventional circuits. Through a remarkable new audio breakthrough, our engineers have succeeded in reducing big -headphone technology down to the size of your listening channels. ![]() With our lightest at 40 grams, you will barely know you're wearing them. The smallest, lightest stereo headphones available today.
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