Hi all!
The power supply for my raspberry pi is outputting too low 4.9v 2.4a but i need 5.1v 3a (ideally).
Rather than just buy a new one, I wanted to make my own step up boost converter to get it perfect (and stop the low voltage warnings). :x
While at it, i wanted to add some capacitors so that power fluctuations would get leveled out and have enough charge that I could disconnect everything from the wall and move the whole thing to the other side of the room without it losing power.
I know how to solder, and understand conceptually what I’d like to do. I just don’t know how - or even if this is really possible.
Is it possible? :?
Many many thanks for any and all help! 
The RPi should run just fine on 4.9V. If there is a problem, it is the current limitation.
It is physically impossible to step up both the voltage and the current, as that violates conservation of energy.
Thanks so much for the quick reply! Agreed the pi will still run just fine, it was just an annoying constant low voltage warning that was dream crushing me.
So follow up hypothetical question - If i had two of these 4.9v 2.4a dc power supplies - could i then combine them to achieve 5.1v 3a?
Humbly grateful for any time to help me understand.
Thank you!
You can’t connect regulated supplies in parallel. The output voltages will not be identical, which could lead to damaging oscillation.
Use your multimeter to check the voltage of the “4.9V” supply when it is connected to the RPi. I suspect it is significantly lower than 4.9V, due to overloading.
You might check thrift stores for higher current 5V power bricks. I’ve seen boxes of them at giveaway prices.