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2x 3V3 needed? #9

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awickert opened this issue Apr 1, 2017 · 0 comments

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awickert commented Apr 1, 2017

We currently have

3V3 1
** RTC
** SD card
** I2C pull-ups
3V3 2
** Analog sensor power
** Any other external sensor, etc. power

Do we really need this? Note:

Will be on at around the same time
Sensors can use the external power, but (if I2C) be pulled up to 3V3 from the internal power.

Note also:

This might not be a problem having 2 in the same chip (like what Chad has found) -- certainly within I2C tolerance even if both sides don't use the same 3V3 regulator (I'm guessing they tap into the same one)
We already have a reel of these chips...

Tentative conclusion:

Keep separate, do nothing; hold the status quo because no real gains or losses.

awickert added the question label

awickert assigned awickert and superchap123

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