(Topic ID: 267184)

Pinsider DumbAss and his / my new 16 opto board!!!

By Xtraball

3 years ago



Topic Stats

  • 7 posts
  • 5 Pinsiders participating
  • Latest reply 3 years ago by Xtraball
  • Topic is favorited by 1 Pinsider

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#4 3 years ago
Quoted from Xtraball:

Enter DumbAss,

Suggestions for @DumbAss:
1) Put vent holes in the PCB so those ?2W? led resistors can breath / cool better. Right under the resistors so convection heating of the resistors draws cool air up from behind the board. Looking at that layout; it should be very easy to put large holes under those resistors. The side effect is those resistors should stay cool; and reduce solder joint cracking.
YDnHO[1] (resized).jpgYDnHO[1] (resized).jpg

2) If you're laying those power resistors directly on the PCB; don't. Put at least a 10th of an inch between the PCB and the resistor's "bottom". Similar effect to 1); but both would be ideal.

#6 3 years ago

I doubt this board needs the strength FR4 provides. It's your design; but I honestly think convection holes in the board would be a good idea. I saw the backside of the design (posted above); and in most cases the holes would have zero impact to the traces.

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