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February 22, 2015
about 2 years ago
If anyone can provide instruction to upgrade this to 500ma for powering a Photon Dev board please let me know!
Yes you can get 100mA from the BOD,… I’m using it. However at +100mA it will cause the BOD power regulator to shutdown/restart (the LED on the BOD will flash or go off). If the power BOD flashes or go’s off when powering your UNO then you’re over the power limit! :)
If you attached the heat sink to the bottom and not the driver IC … then it is very possible that the heat was not dissipating though the board as expected. The red silkscreen of the bottem side would prevent a good contact to the VIA’s and provide a poor contact aria unless modified.
Information and Guessing:
[APWR] Jumper is also hard wired as shipped and enables the on board (3.3v or 5v) regulator.
[VCC] - Can be an input or output based on the [APWR] Jumper.
[VCC] - Does not need to be used.
[VCC] - Can only supply about 100mA. Example: Powering a Photon WIFI Dev board with the BOD. It will NOT work as it requires 400mA startup but only 100mA running.
You connect VCC BED to your PI
The BED, has a APWR jumper that is HARD+Jumper pads that would need to be CUT with a knife.
If the APWR is not cut then it will output 100ma at 3.3v (or 5v) back to your PI. if you have 4 connected that’s now 400ma that may now cause an issue or burnout.
My Guess … It’s not exactly clear how this APRW jumper worked in the instructions but it’s in there vaguely.
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