I'm looking for the board on the picture attached to this post, I can't find it anywhere , I need it with at least 8 relays maybe more. I will have 8 dosing pumps that will activate one at the time.
Thank you.
Show the data sheet for the pumps or a diagram of how you would connect it all together. A mosfet per pump may be a better solution.
Google for: mosfet low side switch.
Hi,
Welcome to the forum.
Please read the post at the start of any forum , entitled "How to use this Forum".
OR
https://forum.arduino.cc/index.php?topic=712198.0
That is a shield with four relays on it, I don't think you will find an 8 relay version.
You would be better with an 8 relay assembly and wire it to your controller.
What model Arduino are you using?
Can you please tell us your electronics, programming, arduino, hardware experience?
Thanks.. Tom... 
I would suggest you contact the Dreek-Robot and see what they offer. I do not understand how this is associated with an Arduino. You need to supply a proposed Schematic, not a frizzy thing, showing how this connects to the Arduino. Supply links to each of the hardware parts. That will give us a starting point.
gilshultz:
I do not understand how this is associated with an Arduino.
It's an Arduino "shield", designed specifically to fit on a UNO or Mega. Not practical to use with anything else. 
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