firstly please forgive any confused terminology, I'm not an electrical engineer by trade!
I have a Raspberry Pi which is operating a series of relays via its GPIO pins. On the other side of the relays are a number of devices; a mixture of mains supply and 12v.
I would like to have a single 12v power supply for all the 12v devices that also powers the RPi, so with a little research it seems I need a switching regulator to convert the 12v into 5v.
My question then is this: given that the load drawn from my 12v supply with be jumping around as the RPi operates the relays is this likely to cause spikes/dips in the 5v supply coming from the regulator or should it be able to cope with this?
For the sake of giving more info:
- my 12v supply is 24W/2A; max load with everything switched on ~20W
- This is the regulator: http://www.ebay.co.uk/itm/271632729700
Is there anything else I should take into consideration before putting this together?
Thanks in advance