Provide power in via Pi-2 header
#7
Hi,

I'm also trying to provide power to the Pine through the Pi-2 Bus, but as you can see in the schematics:
https://drive.google.com/file/d/0B0cEs0l...VrZHM/view
Pins 2 & 4 of the Pi-2 Bus are NOT power inputs, they are only outputs.
It's not the same in the Euler bus, as pins 2 & 4 are directly connected to the DCIN (and therefore to the microUSB) and can be used as power inputs.

Taking a look at the full schematics:
https://drive.google.com/file/d/0B0cEs0l...ItV2M/view
You can see that the DCIN is powering the PMIC and then I supose it is outputing this voltage through PS1 and PS2, that then goes to a MT3608 power regulator that finally is outputing 5V to the VCC-5V line, that powers the pins 2 & 4 of the Pi-2:

microUSB > [DCIN] > PMIC > [PS] > MT3608 > [VCC-5V] > Pi-2-GPIOs

The problem here is that there are a lot of Raspberry Pi hats designed to provide power through the 5v Pi-2 pins and they are not working for obvious reasons.
At this point I have a question, is there any possibility to short the VCC-5V and DCIN lines using the 5V and DCIN pins in the Euler Bus, so that the power from the 5V pins in the Pi-2 Bus powers the Pine 64 without frying something? My concern is that the voltage at the output and the input of the MT3608 could not be the same, and could generate uncontrolled currents flowing through the 5 volt lines. Am I right?

In this case, I'm a bit disappointed with the Pi-2 Bus design, as it was supposed to be used with Raspberry Pi Hats and this use-case has been not considered  Sad
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Messages In This Thread
Provide power in via Pi-2 header - by BenCranston - 06-13-2016, 07:55 PM
RE: Provide power in via Pi-2 header - by g_t_j - 06-14-2016, 06:14 AM
RE: Provide power in via Pi-2 header - by g_t_j - 06-15-2016, 05:17 AM
RE: Provide power in via Pi-2 header - by ciclopez - 12-11-2016, 11:59 AM
RE: Provide power in via Pi-2 header - by g_t_j - 03-08-2017, 02:23 PM
RE: Provide power in via Pi-2 header - by g_t_j - 03-08-2017, 03:03 PM
RE: Provide power in via Pi-2 header - by g_t_j - 03-08-2017, 04:26 PM

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