| Electronics > Projects, Designs, and Technical Stuff |
| How to step up 4.95V to 5V? |
| << < (6/18) > >> |
| wraper:
--- Quote from: XaviPacheco on October 08, 2018, 03:27:19 pm --- --- Quote from: SiliconWizard on October 08, 2018, 03:21:39 pm ---You can either solder wires instead or power it from the GPIO connector (which is what some RPi PSU "hats" do). --- End quote --- Yeah, that's what I did, power it from the GPIO connector. --- End quote --- That's a bad idea, you are bypassing input protection. |
| ogden:
You shall drop idea of 5V PoE because rPI needs up-to 1A or so, voltage drop is too big on Ethernet cable, so you need additional, big& fat power cable. If you need big fat cable - then why don't you just run AC mains to rPI and place power supply right to it? Other option would be to run 24V or 12V PoE and convert to 5V locally using 5V DC-DC switching supply. |
| Janne:
I've a project in where I'm powering the PI's direcly from the GPIO connector. I've set up the voltage regulators at 5.1V on those boards and that seems to work wonders in avoiding the low voltage warnings. IIRC Maxium specified voltage of the PI is 5.25 so don't up the voltage too much.. |
| tsman:
Buy a PoE splitter with a micro-USB plug on it. --- Quote from: wraper on October 08, 2018, 03:36:25 pm ---That's a bad idea, you are bypassing input protection. --- End quote --- If you're careful and don't overload it or connect it backwards then you're fine to do that. It is mentioned as part of the HAT spec. The MOSFET circuit is just to stop backfeeding 5V on the micro-USB power socket. They removed it entirely on the 3B+ and it never existed at all on the Zero boards. |
| Cerebus:
Where's PoE and Ethernet cable suddenly come from? I can't see it mentioned previously in the thread until ogden introduced it. :-// |
| Navigation |
| Message Index |
| Next page |
| Previous page |