Sorry to ask a question that I feel I should be able to google, but I'm kind of stuck.
I have some different 5v AC/DC power supplies that I need to plug into the wall and use to power rgb LEDs.
The max currents that I need to draw from these supplies are 2,4A, 1,2A, 0,9A, 0,6A, so I use one power supply 2,5A, one 1,5A (this one is variable 3-12V, I'm assuming that I get minimum 1,2A at 5v) and the rest 1A.
What value capacitors do I put across 5v and gnd in these particular circumstances?
I get that they should be rated for 10v as a safety, but I don't know how to get to a good number on capacitance. No datasheets available to me on the power supplies, but on the 1A supply it says 300mV ripple on the web site where I buy them.
Thanks!
EDIT: Schematic
EDIT2: Updated schematic
Best Answer
These are regulated DC power supplies so you probably don't need additional capacitors in your circuit. The wall-wart already has capacitors built in. 300mv ripple may not be noticeable if you're simply driving an LED string- in any case that level won't destroy anything you're likely to be working with. Give it a try sans capacitors first, see if it works, worry about ripple later.