5V line?

[sukjinkang]

I need to drive some 5V devices, that require a decent amount of current, like Raspberry Pis. It doesn't seem like there's 5V available on the board. I would think that the best way is to regulate down V_batt. Which pin would be a good candidate for V_batt DOWNSTREAM of the inhibits? Any suggestions on voltage regulator to use?

Thank you!

[maholli]

You have a couple options:

1. There is a 5V regulator on board (the RF regulator) and I know of at least one group of students using it to power an RPi. Convenient since you already have control of the RF regulator's enable pin. They're connecting to their RPi via the radio-2 slot (backside).
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   • As for regulator recommendations, the flight RF regulator is a decent LDO option if you can find any in stock these days.
2. To answer your question about VBATT downstream from the inhibits, this is made available via the payload slots and/or payload connector. Just select VBATT (solder jumper/0 ohm) and then Payload VDD will be VBATT (downstream from inhibits).
   • This is nice since there are payload slots on top and bottom of the board with independent VDD configurations for each and GPIO to allow you to control an enable pin (for example) as well as uart/i2c/spi. Full payload connector pinout available on PyCubed's Payloads page.
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3. Similar to number 2 above, another option is to make a little payload board that has a regulator for the RPi. The Berkeley folks posted a similar payload board for controlling a bunch of h-bridges:
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