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. . . continued from page 94
all the different lamp monitoring arrangements used in modern cars. Some
cars do not monitor the flasher lamps
at all but the blinker unit will flash
more rapidly, as you noted.
Finally, it turns out that there are
relay/LED driver modules available
from Jaycar. There are two models:
the “CFL-13 JL-02” www.jaycar.com.
siliconchip.com.au
au/p/SY4018 and the “CFL-14 JL-02”
www.jaycar.com.au/p/SY4016
LED GPS Clock
1pps query
Having read the two parts of the
High-Visibility 6-Digit LED GPS Clock
in the January & February 2016 issues,
I’m wondering if it’s possible to leave
out the GPS module and feed in a 1PPS
signal from an existing external source.
Also, would it be possible to program
the remote or provide an extra switch
to swap between two time zones?
The purpose would be to have local
time and UTC time from a single accurate clock. Though I’m guessing it
would also be fun to have two separate
clocks, perhaps with different colours!
Many thanks for the great construction
articles. (A. W., via email).
• If pulses are received on the 1PPS
pin, they are assumed to be valid 1Hz
pulses, regardless of whether the unit
has had any serial communication
April 2016 95
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