Can a power supply be used for more than one device?
As the comments point out, there are numerous other considerations that determine whether your power supply is appropriate. The current capability being 8 A and the actual load being 2-3 A is not going to be a problem if the regulator circuit is at all well designed. Thanks for contributing an answer to Electrical Engineering Stack Exchange!
Does it make sense to power all devices from one power source?
Each ones comes with a own power supply. This leads to a waste of space and a mess with all the cables. Does it make sense to power all devices from a single power source? I would simple buy a power supply which provides enough current to power all devices and would connect all the cables to this single power supply.
How many amps does a power supply take?
I’ve sourced a power supply that takes 240 AC mains supply and provides 5v @ 8 Amps. The RPI can see up to 1 Amp draw, or higher. Some take 0.5A by themselves with nothing plugged in.
Why are power supplies used in multiple series?
The reasons for using multiple supplies may include redundant operation to improve reliability or increased output power. When providing combined power, care must be taken to ensure power is delivered in a balanced manner by all of the supplies.
What kind of power supply do I need for a laptop?
PC power supplies are typically rated 300 – 500 watts, which is a little overkill for this project. I was thinking that something like a laptop brick 80 – 100 watts would be better suited.
How many watts does device 2 and 3 use?
All the supplies can be derived by rectifying and smoothing this. the current power supplies for device 2 and 3 are 6V @ 1A so they would take 6 Watts. So the total would be 60.58 watts.
Is it good to have constant voltage power supply?
It is generally a good idea to design a constant voltage power supply with more current capability than you need. This will generally allow the supply to run cooler, and it also allows for the possibility you underestimated your actual needs. When the system is idle, will this be an issue, i.e. the devices are not drawing maximum current?