NinjaJoe

Recipes 

http://www.bestelecs.com/download/songlerelay/SRD-12VDC-SL-C.pdf



I purchased one of these for a different project but would like to use it to control some 12VDC fans.

l3asturd

Recipes 

Don't see why it wouldn't work. Assuming you power the coil with 12VDC and pass the same 12VDC through the relay to the fan? What is your power supply?

trigger

Recipes 

Yes you can use that for fans. It's way overkill, but as long as your fans aren't drawing over 10 A you're set. Are you using a uC to control the relays? If so, you could just use a 2N2222 transistor switch for small PC size fans, or a MOSFET, either of which would be cheaper and have a smaller footprint.

__________________
The power to tax, once conceded, has no limits; it contains until it destroys. I was not joking when I told them to dig into their own pouches. It may not be possible to do away with government — sometimes I think that government is an inescapable disease of human beings. But it may be possible to keep it small and starved and inoffensive — and can you think of a better way than by requiring the governors themselves to pay the costs of their antisocial hobby?

R. A. Heinlein

NinjaJoe

Recipes 

I'm pushing some other 12VDC devices as well, but here is what I'm using.


I had that 4 relay board left over from my previous brewtroller build and would like to use it in this new fermtroller build. I'd like to use 2 fans per relay (2 by the freezer part of the mini fridge, and 2 in each fermentation chamber) and the 4th relay would be connected to an SSR for controlling power to the mini fridge.

trigger

Recipes 

I see now. That should work fine. You can probably just drive the SSR right from your uC. I had some question about that when I started my current project, but I was reassured by a few people that it would work and it does. There's also no reason you couldn't drive it from the relay board, just unnecessary. Leaving it off would free up one of those relays to run a small heater of some sort.

__________________
The power to tax, once conceded, has no limits; it contains until it destroys. I was not joking when I told them to dig into their own pouches. It may not be possible to do away with government — sometimes I think that government is an inescapable disease of human beings. But it may be possible to keep it small and starved and inoffensive — and can you think of a better way than by requiring the governors themselves to pay the costs of their antisocial hobby?

R. A. Heinlein