Start by taking the Storage box and measuring five inches up from the bottom on the two longest sides. And lay out a grid of 1" holes. We placed two on each of the extrusions, one each on the two smaller flat parts, and three in the middle. Drill them out with a hole saw, and clean up any left over plastic.
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Step 2
Next mark put the holes to mount the brackets to hold the internal plumbing. We used the two outer most extrusions and made a little template to mark them. Drill these out with a holes suitable to fit your mounting screws. You should have four mounting points in total.
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Step 3
In the top of the lid mark out and cut two 4" diameter holes to mount the fans in.
Couple of notes: The PCB has a couple of issues I will probably address after the burn. 1) Make sure you use an official Arduino Pro Mini from SparkFun. The cheap ones needs less than 12V RAW supply which makes it less than ideal for a solar set up. I'm gonna modify the design with a built in 5V regulator to address this. 2) The Motor Controllers aren't rated for the amperage the motors can draw I have a couple of other chips that I need to replace them with to make it better. Otherwise these just make a lot of heat. 3) I have a version of the board that uses just plan old mosfets and has a built in LDO chip to regulate the voltage that I will upload at some point.
Couple of notes: The PCB has a couple of issues I will probably address after the burn.
1) Make sure you use an official Arduino Pro Mini from SparkFun. The cheap ones needs less than 12V RAW supply which makes it less than ideal for a solar set up. I'm gonna modify the design with a built in 5V regulator to address this.
2) The Motor Controllers aren't rated for the amperage the motors can draw I have a couple of other chips that I need to replace them with to make it better. Otherwise these just make a lot of heat.
3) I have a version of the board that uses just plan old mosfets and has a built in LDO chip to regulate the voltage that I will upload at some point.