EE462L, Power Electronics, Fall 2010, Version Aug. 25, 2010
Page 18 of 22
Circuit Tear-Down and Salvaging
After judging, non-ribbon winning teams are expected to salvage their circuits. DBRs are an exception – half
are kept in service throughout the semester. Salvaging is a requirement to receive a lab grade for a circuit.
Some parts are re-used if they are in good condition. Other items are placed in surplus in ENS212. Only
high-quality parts are re-used. Undamaged wood screws and machine screws without heat sink compound on
them should be returned to the wooden screw cabinet. Most of the wood is kept for general student use.
Here are details, circuit by circuit. Put the parts shown below in the plastic bags as they were initially
distributed, with your names visible on a piece of paper inside the bag so you will receive lab credit.
Light Dimmer (the following go back in bags as you received them, with your names visible inside)
Item Re-Use Salvage Comments
60W Light Bulbs
•
Ohm check. Individually pack in 6x8”, 6 mil plastic
bags.
Porcelain Light Bulb
Bases
•
Snug the screws. If there are any missing screws, see
Dr. Grady of a TA for spares. Individually pack in 6”
x 8”, 6 mil plastic bags.
Corner Brackets
•
Cleaned
Terminal blocks
•
Snug the screws. If there are any missing screws
(except the red-marked hole), see Dr. Grady of a TA
for spares.
Rubber Washers
•
Triacs
•
Cut off the wires, just beyond the triac leads
Potentiometer & Lock
Nut
•
Cut off the wires. Put the lock nut back on the pot.
Small Heat Sinks
•
DBR (the following go back in bags as you received them, with your names visible inside). Half are
salvaged right away, and the other half are salvaged at the end of the semester.
Item Re-Use Salvage
Large Heat Sink
•
Cleaned
DBR Module
•
Cleaned. Quick disconnects removed.
Corner Brackets
•
Cleaned
Terminal Blocks
•
Snug the screws. If there are any missing screws, see
Dr. Grady of a TA for spares.
Capacitor
•
Note for staff – these will be used for four semesters,
then salvaged. When finishing a semester, write the
semester, e.g. Fall 08, on the side with a permanent
marker. If suspect for damage (i.e., bulging, pop-off
valve extended, etc.), mark an “X” on the side with a
permanent marker and discard.
Capacitor Clamp
•
Wooden Clothes Pin
•
Toggle Switch & Lock
Nut
•
Remove from bracket, pull off quick disconnects, and
put the lock nut back on the toggle switch
Thermistor
•
LED
•
Cut off the wires, just beyond the LED leads
0.01Ω Resistors
•
Leave spade connectors on
Grady, EE462L, Fall 2010, Page 18 of 204
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