Electronics > Projects, Designs, and Technical Stuff
How to step up 4.95V to 5V?
<< < (5/18) > >>
XaviPacheco:

--- Quote from: SiliconWizard on October 08, 2018, 03:11:02 pm ---I've found the RPi (especially the Pi2 and Pi3) to be very finicky with 5V power supplies. That can be a huge pain.

This RECOM module is fine power-wise, the problem is the transient response. How long is your cable?


--- End quote ---

My cable is 7 feet.
SiliconWizard:
Yeah that's long enough to cause issues on transients with a Pi if the cable is low-quality. If you're using an off-the-shelf micro-USB cable, I've found a lot are VERY bad for power delivery. An alternative is to power your Pi not using the micro USB plug. You can either solder wires instead or power it from the GPIO connector (which is what some RPi PSU "hats" do).
XaviPacheco:

--- 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.
SiliconWizard:

--- 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 ---

Oh ok, so you can use any kind of cable then. Use proper wire diameter and you shouldn't have a problem.
Just be aware that by powering the Pi from the GPIO connector, you're bypassing the on-board fuse on the 5V rail. So I'd suggest adding an external fuse.
TK:
Why not bring mains voltage 7 feet and use the DC voltage conversion next to the Pi?  Voltage will drop on long cables.  Google voltage drop calculator to estimate your needs.

EDIT: I edited the original post based on a correction noted by mikeselectricstuff
Navigation
Message Index
Next page
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod