|Electronic Vector Clock Page.
on pictures to get larger/higher quality images.
|This is an electronic digital
timepiece that presents an "analogue" look. It uses vector
to draw a traditional clock face on a small electrostatic-deflection
cathode-ray tube display.
||« Here's a close-up of the
unit's CRT screen, showing the standard 12-hour format.
||« It can display
|« Or, if you prefer,
|« Here is the
||« This photo shows the
front panel, with the operator controls.
|« This is a top view with
the cover off. The large rectangular structure in the center is
the card cage; note the access hole for the firmware EPROM. On
the left is the low-voltage power supply, at the top left is the
high-voltage supply, and on the right are the CRT bias circuits, the
deflection amplifiers, and the CRT itself.
The big loop in the power wiring (on the left) allows the rear panel to be swung out for access to the card-cage.
|« Here is an oblique view
of the interior at the right rear of the unit, showing the boards in
the card cage, the deflection amplifiers, the Z-axis modulation
circuits, the CRT bias circuits, and the socket end of the CRT.
The ceramic terminal strip was cannibalized from an old Tektronix
|« These are the control
computer (top) and vector graphics generator boards, removed from the
|Here is the Electronic Vector
documentation and firmware. The schematic diagrams are
in Adobe PDF format; other files in formats as indicated.
VECTCLK_SCH Schematic diagram of the clock's "mainframe."
CTRL_SCH Schematic diagram of the clock's embedded control computer board.
VECTGEN_SCH Schematic diagram of the clock's vector graphics generator board.
z80.asm (ASCII) Source code for the control computer firmware.
z80.rom (BINARY) ROM image of the control computer firmware.
pic.asm (ASCII) Source code for the vector generator timing controller
pic.hex (HEX) HEX file for the vector generator timing controller firmware.
clock_design_notes (HTML) Electronic Vector Clock Design and Construction Notes.
|Copyright TimeFracture 2004.