For my project, I have this power supply which makes me an unregulated 5V power input.
I'm willing to use it to power both my Pi and my 5V led strips. This power supply is rated at ±5%. I'm going to connect the +5V to the micro-usb +5V test point and GND to GND (to use the protections of the usb port). Do I need to insert any kind of regulator in-between? And if so, I suppose the 7805 family wouldn't be what I'm looking for as it needs at least a 2V drop. Is it?
Also, if I limit the number of leds to a max of 9A current use, would making all leds flash fast create any problem to the Pi's power input that a combo of a small and a big capacitors wouldn't "fix"?