As of 11/26/14
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2 pairs of digits are
able to be changed automatically by the microcontroller.
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All digits are mapped
in the microcontroller and can be easily pushed to clock display
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Reset Function works
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Count up feature is
in progress, to be quickly followed by the count down
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Keypad is being
pinned out
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A full 3rd
of the clock display is operational, only slowed by lack of more driver chips
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Code has been set up
to control any segment on any digit easily
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Segment flip time has
been tested between 25ms and 75 ms
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Segment flips are
likely not efficient. New algorithm is being tweaked as errors were present
when implemented.
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Board is being designed
for final product
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Power supply is in
the works
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The keypad has been
found to have 32 buttons, 5 of which are not shown, but are likely functional.
Figure
1: Current test setup
As of 9/30/14
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Pinned out connector.
Figure
2: Left: digit numbering. Right:
Pin-out of each digit.
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Tested all segments.
All segments on all digits are working.
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Driver chips are
micrel MIC5801BN, These are available for about $4.41 each on digikey.
MIC5801YN are the same part but lead free
As of 9/23/14
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Clock was received
this week
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Screws on left side
are badly stripped and will need replaced
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Manufacturing tags
date manufacture as 1990.
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Someone has worked on
this clock before.
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Each digit has a
separate connector
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1 digit has a non
matching retrofit connector
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Found that on cables
Black is common, Red turns segment on, Orange turns segment off.
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According to previous
team solenoids are rated for 6 volts at 225ma