So I just purchased and received my Rock5B, can anyone confirm if there is a standard the heatsink mounting conforms to? Regardless of it being “okay” to run without, I’m seeing 80 degree C temps in an environment with 20 degree C ambient.
Would also really help to either sell a compatible charger with a UK plug option, or link to a recommended one.
It’s a 55mm mounting hole that lots of PCH coolers also uses. Just look at the official cooler and find a one with same shape and 55mm mounting hole and you will be fine.
I’m trying to add Rock5 to SBC_Model_Framework to ease the process of making a customizable case for Rock5B, and now we have a prototype from the mechanical drawings, and I would like to ask someone who has a 3D printer to do a verification print see if the measurement is correct. I also ordered 3D print from my local store but it may take some time to arrive. Once the verification (and the measurement fixes after the verification) is corrected I will create a pull request to add Rock5 to SBC_Model_Framework.
It seems like the actual PCB thickness is slightly smaller than the number we used. I’m going to get my printed prototype today and I’m going to do some check on that.
Anybody seeing this please don’t waste your time and materials for this version prototype. I received my prototype today This version has some critical dimension errors that prevent you to insert the board into the top of the case. I still need some time to collect a summary of modifications needed.
Here’s the quick summary of modifications needed from my initial inspection:
The 3.5mm opening is too small for the connector, need ~1mm more radius.
The HDMI port opening is too high, and need to go down ~2mm.
The mounting stand is too thick and will interfere with the fan header, need to be 1-2mm thinner.
Resolving the above would at least make the board get into the case.
Some other problem:
The TF card opening is too low to be useful and you cannot insert the card in, still need to verify if it’s a PCB thickness issue or slot placement issue.
The switch openings are off, little bit too tall and to the right, but the button is too small to be pushed in using those openings anyway, probably we need something(like a mechanical button) to help us push those buttons easier.
The nvme drive need some airflow, but the vent has to be opened on the side of the case because openings at the bottom is meaningless as your desk will cover it.
It would be great to have a metal case! But not full metal, unless the load temps require it. I’ve had some bad experience with a full metal case on another SBC: It introduced a loose contact, leading to restarts of the board when I move it and it’s also really heavy, making it impractical for traveling. It also doesn’t feel like a perfect fit, so you get that anxiety of breaking your board with the full metal case.
So the best option is too use as much metal as is needed to keep the full load temps down but to also keep the weight down by using quality plastic where possible.
A good case should also think of any accessories like NVMe that might also require cooling or at least some air vents and space.
If you have a FDM printer, the 5B board specs have been added to “SBC Case Builder” ( however i did have the lid’s board supports fall off on the ‘fitted’ version due to not being designed right, should be easy to fix however. )
I’m working with the maintainer of SBC Case Builder to provide a correct model, and the prototype I posted here is indeed generated by that tool, but as you see we still need some specs to fix.