I've heard this discussed a few times, and the idea of using diodes to
"regulate" this way makes me very queasy.
Why would a real 3.3V regulator not be used?
________________________________________
If the new chip requires 3.3 vdc and there aren't 3 diodes on the board to drop
the 5 vdc down, this will be a problem. The old board had 3 zero ohm resistors
in place of the diodes and this is why some of the boards failed. As I had
posted previously, I used a red LED as a 1.7-1.8 volt zener to drop the 5 volts
down to the proper value. The LED went in place of the 3 regular diodes.
-Arthur
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