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Unread 29-01-2014, 18:41
MattRain MattRain is offline
AZ FTC AF, FTC #2844 and FTC #8640
FRC #1492 (Team Caution)
Team Role: RoboCoach
 
Join Date: Sep 2012
Rookie Year: 2008
Location: Chandler, Arizona
Posts: 322
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Re: [FTC]: HiTechnic Sensor Multiplexer question.

Reading through the FTC Offical Fourm....

Quote:
Originally Posted by FTC0025
The HiTechnic Sensor Mux uses an external 9v battery to supply
power to each of the attached sensors. We had problems with
this last year as it is not wired to the main robot switch, so our
drivers would either forget to turn it on with obvious results, or
forget to turn it off, thereby leading to dead 9v batteries not
discovered until just prior to the beginning of a match.

We'd like to know if it would be acceptable to use an LM7809
voltage regulator and associated circuit either on a breadboard,
or soldered protoboard to power the mux. Input would be 12v
from the main battery, output would be the regulated 9v into the
mux.
A: No. The sensor mux may only be powered by the provided 9v battery box.

SOOOO Nope. Dangit.
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