POE teachers

We understand that some classrooms are experiencing a failure with a
Condor power supply (PLTW part no. 30173-RB) that was included in the
POE kits sold before January, 2010, when the power supply is used
with the 9V outputs on the Intelligent interface or fischertechnik
Robo interface to perform activities 1.23 and 1.25 in the POE
curriculum. If these activities are not completed as described in the
POE materials, then students may create a short in their circuit and
the power supply may heat up and fail.

POE kits sold after January, 2010 include an updated Condorpower
supply (PLTW part no. 30173-TX), which has a protective mechanism
that will shut down the power supply so there is no damage to the
power supply unit. Also, as of April, 2008, PLTW updated to a
fischertechnik Robo TX controller which includes a similar protective
mechanism.

PLEASE BE SURE TO CAREFULLY FOLLOW THE INSTRUCTIONS IN THE POE
CURRICULUM WHEN PERFORMING ACTIVITIES 1.23 AND 1.25 TO AVOID THE UNIT
HEATING UP.

If you have any comments or questions, please let us know as your
input is helpful and appreciated. You should direct any comments or
questions to: Shannon Kete, Chief Operating Officer, skete@pltw.org