Well I’ve made some progress on the hardware for this project, I put together a 6 channel mosfet shield. I’m sending out the board today to have someone run some tests on it for me since I don’t have the equipment to do it here. If anyone has any suggestions please let me know. The unit is powered by a single 12v source, which also supplies voltage to each output. This unit is designed to run one pump at a time, even though the highest quality pumps I’ve tested only draw 150mA.
I went with a Traco TSR 1-2450 DC/DC buck converter for the 12v -> 5v conversion, and for the mosfets I’m using IRLB8721PBF.
If anyone has any further suggestions please let me know. I’ve tested the unit with a pump, ran it for multiple hours and tested on/off with a set program and it worked well. The mosfet’s didn’t even get warm.
Does anyone have any suggestions for enclosures? I need to figure out sizing yet, but in the mean time I’m looking for suggestions. Clearly I’ve scoured the internet and have a few ideas up my sleeve, but I figure it never hurts to ask.
Here’s a photo (don’t mind the old spark core)