I have question regarding powering on RPI through PI hat. I want to get rid of micro usb and want jack that goes in PI hat. Can i power up RPI through pi hat?
None whatsoever -- on the official PSU there are no data wires. But detachable cables may be moved to other uses where the data wires are required.fahadraza007 wrote:Thanks for your reply. can you explain that what's the benefit of data wires in micro usb cable in powering RPI.
No difference. As a general rule you should use both. What gets trickier is the fact that the GPIO connector has multiple ground pins. It is probably better to use as many as possible to ensure that you don't land up with any undesirable current flows through the ground plane.NatePiVision wrote:Hi Geoffr,
Thanks for the feedback, that's good information. I'm ultimately working towards a pcb that will run a compute module (patiently waiting for CM 3 to come out) so I think that'll need to be incorporated anyways in the end. I'm going to give it ago with the 5V pins. Is there any difference between pins 2 and 4 (ex, pin 2 is RPi Pwr and pin 4 is USB).
The power protection circuit of the Pi3B is shown here. Ideally any power supply working through the GPIO connector should replicate this, or something equivalent. Strictly an external D5 and C1 are not necessary for a Pi1/2/3, since they exist in the right place on board. The perfect diode block was introduced on the B+, an equivalent is strongly recommended if using a barrel connector or any other source that could have reverse polarity. The critical part in all cases is the polyfuse F1.geoffr wrote:You can provide a Pi power through the 5V pins on the GPIO. What you need to remember is that you are then bypassing the protection on the power supply input of the Pi. That means your Pi becomes a lot easier to fry. It probably would be advisable to consider whether you should include over-voltage and current protection as part of your design.