Vol.6, No.8; August 1993
FEATURES
FORGET THOSE
MESSY edits on
your VCR. This
project smoothly
fades any composite PAL video
signal to black & can also wipe
left or right across the screen for
special effects. Details page 18.
4 Ghost-Busting for TV Sets Now Feasible
New system from Philips cleans up the signal
6 The Keck Optical Telescope, Pt.2 by Bob Symes
The world’s biggest optical telescope
PROJECTS TO BUILD
18 Low-Cost Colour Video Fader by Darren Yates
Fades to black or wipes left or right across the screen
30 A Microprocessor-Based Sidereal Clock by John Western
THIS STAR CLOCK is micro
processor controlled & has two
6-digit displays which show
sidereal time & either local or
universal time. See page 30.
Shows sidereal time plus local or universal time
56 Build A 60-LED Brake Light Array by Leo Simpson
The LEDs light from the centre outwards
82 The Southern Cross Computer by Peter Crowcroft & Craig Jones
A single-board Z80-based computer for the 1990s
SPECIAL COLUMNS
40 Serviceman’s Log by the TV Serviceman
Little things can be big time wasters
53 Remote Control by Bob Young
Unmanned aircraft – Israel leads the way
YOU’VE SEEN THOSE fancy
brake light arrays on late-model
sports cars & now you can build
one for your car. It uses 60 highbrightness LEDs that light from
the centre outwards. Construction
starts on page 56.
62 Vintage Radio by John Hill
How to deal with block capacitors
72 Amateur Radio by James Morris, VK2GVA
A look at satellites & their orbits
DEPARTMENTS
2
28
75
79
Publisher’s Letter
Circuit Notebook
Order Form
Product Showcase
90
92
95
96
Back Issues
Ask Silicon Chip
Market Centre
Advertising Index
THIS SINGLE-BOARD Z80-based
computer is designed for the
1990s generation of students. It
comes with a fully commented
monitor & is designed to teach
microprocessor & microcontroller
programming techniques.
August 1993 1