I'm wondering how I would go about using one AC/DC converter to supplying power to an Uno and components through a Relay Shield V2.0
Any advice would be greatly appreciated.
Being a shield, they expect Arduino's onboard 5volt regulator to power the four relays.
Current should not be a problem. Heat migh be if you use a plugpack on the DC jack that's more than 9volt.
7.5volt would be ideal. 9volt would be ok. Regulated, 1Amp.
12volt is not ok.
Leo..
Could I still supply power to the relays directly from an external dc power source?
I'm trying to see if there is some sort of splitter that could take a single high DC voltage from an AC/DC converter and use it to power the Arduino and multiple 5 volt solenoids at once. Any thoughts?
The four relays connect directly to the 5volt pin, according to the Eagles file I have.
You could remove the 5volt pin from the shield.
I don't see why you have to split Arduino's supply and the relay supply.
If you have a DC voltage that's too high, drop it down to 5volt with a DC/DC converter.
And feed it directly into the 5volt pin, or the USB socket.
Explain what voltage you have, so we can give the right advise.
Leo..
Some components to be powered though the relays may require 9 volts maybe 12 and I'm thinking I can not run that much power through the Arduino. If I start with a 24 volt power supply is there a way to route 5 volts to the Arduino and the remaining voltage to the components while only using a single AC/DC converter (a 24 volt power supply)?
dclark77:
If I start with a 24 volt power supply is there a way to route 5 volts to the Arduino and the remaining voltage to the components while only using a single AC/DC converter (a 24 volt power supply)?
Doesn't work that way. You can't just wire things in series like Christmas lights.
What do you want to switch with the relays.
If the devices are mainly 12volts, get a 12volt supply.
You can drop that with a small DC/DC buck converter to 9volt or 7.5volt for your Arduino.
Leo..