Rasberry pi pump control

[Coastiebrewer]

Hey guys. I've been researching and ordering parts to start off in the wonderfull world of electronic brewing. I'm looking to run elsinore on a rasberry pi and one of the things that is escaping me is what I would need between the electrical socket for the pump and the pi board for elsinore to switch it off it on. Sorry if this a little to simple and explained somewhere but I've been reading every thread and build and still can't seem to find it. Any help such as a link to a part would be awesome and greatly appreciated. Thanks.

 

[golfindia]

Something like this. It needs to have an optocoupler. And invert the gpio signal in the software so it is off by default.

https://www.amazon.com/dp/B00E0NTPP4/?tag=skimlinks_replacement-20

Edit: also make sure you have a robust power 5v supply if you will have more than a couple on a once. If not, you'll get the low power "lightning bolt" in upper right corner of screen.

 

[Coastiebrewer]

Thanks golf. And to be clear that can power 2 pumps right?
And I was thinking this for a power supply
https://www.amazon.com/gp/product/B01L8DVOFM/?tag=skimlinks_replacement-20

 

[golfindia]

That should work for 2 relays. I've run 2 off of a 2.5a phone charger. Ive also used one of these: (5v only runs the relays, not the pumps)

http://www.jameco.com/z/RID-65A-Mea...Volt-12-Volt-8-Amp-4-Amp-66-Watt_2106212.html

If you are using solar pumps, the "B" model is 24v instead of 12.... it's 66w though so if you put it in an enclosure you will probably need a fan...

 

[Coastiebrewer]

I currently have 1 120v chugger pump right now but will eventually move to two. Do I need the power supply for the optocoupler or just for the pi itself? Thanks again I appreciate all the answers.

 

[golfindia]

The relay gets its 5v from the pi board 40pin IO.

 

[Coastiebrewer]

OK. Starting to click in my brain parts now. Thanks again for all your help.