6
Attaching LEDs to Heatsink and Wiring LEDs Together
In the next set of steps, we will attach the LEDs to the heatsink, tin the LEDs and the wire used to
connect the LEDs together, and then wire the LEDs together. After all of this is complete, we will insert
the heatsink into the hood of the BC8.
Thermal Grease
We need to apply thermal grease to the back of each LED before securing it to the heatsink.
Thermal grease ensures proper thermal conductivity of heat away from the LED into the heatsink. A
very small dab of grease on the back of each LED is all that is necessary. More is NOT necessarily better.
Too little will lower conductivity and too much will create a mess. A thin layer works best. The photo
below indicates approximately about how much thermal grease should be applied.
After the thermal grease has been applied to the star, screw it into the heatsink with two little
screws, adjusting the height of the two fastening screws to center the LED between them. Do not over
tighten. The screws should be snug but not tight.
When screwing down the LEDs, ensure the screw is
not touching any solder or solder pads
. This will ground the string at that point and cause strange
behavior and possibly, damage.
Example of properly secured LEDs:
