Project Power Supply 115VAC to 7-15VDC

[james211]

So here is the project, I have two peristaltic dosing motors that run on 115VAC and an arduino with relay shield that runs on 7-15VDC for turning the motors on and off. I want to enclose all of this in a metal instrument case with a single power cord. So what I'm looking for is a small AC-DC power adapter that I can enclose in the project box to keep the whole thing simple. Does this make sense?

Can I strip out a wall-wart or is that too risky?

 

[Reloadron]

You don't mention the motor power requirements beyond the voltage? Anyway, I don't see why you can't just use a well filtered wall wart to power the Arduino and associated low DC voltage stuff. Why strip the wall wart? I have a 12 VDC 1 Amp wall wart I use to drive a small 5 volt regulator with for some of my old uC projects. You need to better define what you need for voltages and currents beyond the 115 VAC for the motors.

Ron

 

[alec_t]

I'd go for a small 12V wall-wart. A 0.5A rating should be more than adequate if you're only driving 1 or 2 relays. The relay contacts, of course, would need to be rated for a 115VAC inductive load at > whatever current the 2 motors draw.

 

[4pyros]

You can get them with cords on both ends like this;