I'm working on a project that has components requiring various voltages.
3.3v --- to power a set of laser diodes (qty 24 @ 50mA = 1.2A)
5v --- to power a set of infrared transceiver sensors (qty 24 @ currently unknown current)
9v --- to power an Arduino board and some peripherals (some typical Arduino-esque current draw)
I've never done a project like this (with various voltage requirements), and I'm wondering what the best practices are for powering these separate sub-systems.
Would one of the following scenarios be most appropriate?
Scenario A - Multiple power supplies --- Use a separate AC/DC power supply for each required voltage (Meanwell or somesuch) --- Somehow connect all the grounds together
Scenario B - One power supply and voltage regulators --- Use one AC/DC power supply rated at 9v --- Step down the voltage to 5v and 3.3v using appropriately rated voltage regulators
Scenario C - Something I could never have imagined!
Thanks in advance.