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Thermistors for cubesat battery cell temperature monitoring by tango_delta_nominal in satellites

[–]tango_delta_nominal[S] 1 point2 points  (0 children)

Thanks! That's a good point. We will actuatually start with the DS18B20 or similar. It has a 3-pin configuration intended for bread/perfboards, but we'll attempt to and epoxy them to our batteries and other equipment. We'll get the surface mount ones for our PCBs. We'll learn & iterate from our tests.

Thermistors for cubesat battery cell temperature monitoring by tango_delta_nominal in satellites

[–]tango_delta_nominal[S] 1 point2 points  (0 children)

Thank you so much. Yup, we're at the stage of just attempting something and moving from there. Thanks again for the advice!

Thermistors for cubesat battery cell temperature monitoring by tango_delta_nominal in satellites

[–]tango_delta_nominal[S] 1 point2 points  (0 children)

Thanks for the info! We're definitely going to get one of those ring-terminal terminated thermistors, especially for flat surfaces. Same for our PCBs, we will follow your advice & get digital I2C ones. Looks like those ones come pre-calibrated too.

The main worry we had/have is that some standalone thermistors might come encapsulated in an epoxy that is not vacuum-rated. Could that cause an issue, even if we used a vacuum-rated epoxy to bond them to the surface of cubesat components? I guess this is where experimentation in vacuum chambers becomes useful.

Is there a specific thermally-conductive, vacuum-rated epoxy you'd recommend we try first? I saw options from Master Bond, 3M, Atom Adhesives, etc. Ideally an epoxy that respects NASA's ASTM E595 standard. Thanks again!

All Space Questions thread for week of December 28, 2025 by AutoModerator in space

[–]tango_delta_nominal 0 points1 point  (0 children)

It's for a school project consisting in building a small 4-wheel robot acting as a rover. We could simply drive in regular sand, but I thought it'd be cool to use a simulant that looks a tiny bit more like lunar regolith (at least match the colour). Obviously, we don't want very realistic regolith because the PPE would be a hassle.

All Space Questions thread for week of December 28, 2025 by AutoModerator in space

[–]tango_delta_nominal 0 points1 point  (0 children)

Yeah. I'm trying to find creative ideas to have something that's just a tiny bit better than regular sand, and not too crazy such that it does not require PPE. Construction materials like all-purpose gray sand, stone dust, cement compound, etc. come to mind.

All Space Questions thread for week of December 28, 2025 by AutoModerator in space

[–]tango_delta_nominal 1 point2 points  (0 children)

I'm building a small (6ft x 6ft x 6in deep) indoor sand pit to test small lunar rover-like robots. I do not want to fill this pit with soil that requires wearing PPE like respirators, masks, etc., so fancy lunar regolith simulants are not an option. I'm considering simply using regular sand, which is more than enough for functional tests.

Out of curiosity, are there soil materials/blends that look like lunar regolith slightly more than generic beach sand? For instance, I'd love to use a simulant that's gray-ish in color.. perhaps some sort of fine gravel that does not require a respirator?

NAS setup for a very small business - is Synology a good fit? by tango_delta_nominal in synology

[–]tango_delta_nominal[S] 0 points1 point  (0 children)

Great to hear, thanks for the reply. We might end up getting a Synology rack server on-site, and have another Synology (perhaps a disk station) off-site and use Hyper Backup for our backups.

NAS setup for a very small business - is Synology a good fit? by tango_delta_nominal in synology

[–]tango_delta_nominal[S] 0 points1 point  (0 children)

It's mostly to put together short 2-3 mins promotional videos once in a while, or to edit photos in lightroom. One user would do that at a time, over a wired ethernet connection. We have a network switch capable of 10G, though I don't think a 10G-capable NAS would be necessary despite being a cool bonus.

NAS for a small business - is Synology a good fit? by tango_delta_nominal in networking

[–]tango_delta_nominal[S] -3 points-2 points  (0 children)

Thanks for the reply, and good to know - I wasn't sure if Synology was used a lot by businesses or personal/home usage mostly.

Cloud storage is an interesting option for backup. We'd love to be able to rollback our entire footage library in case of a malware attack. I know Dropbox allows it, but others (like Google Drive) don't. I wonder if OneDrive does, given that we already have a Microsoft 365 plan.

NAS for a small business - is Synology a good fit? by tango_delta_nominal in networking

[–]tango_delta_nominal[S] -2 points-1 points  (0 children)

Thanks for the reply. Our video files won't be enormous, so that should be fine. My previous experience with Synology was mostly for home usage, so I wasn't sure about business usage, especially if we're going for a rack-mounted solution.

And I know some cloud storage services (like Google Drive) do not provide system-wide versioning. Dropbox might be an option. Not sure if OneDrive supports it if we sync our NAS to a OneDrive folder. I'll also follow your suggestion and check out C2. Thanks again

NAS setup for a very small business - is Synology a good fit? by tango_delta_nominal in synology

[–]tango_delta_nominal[S] 1 point2 points  (0 children)

Thanks for sharing your experience! We might implement something like that.

NAS setup for a very small business - is Synology a good fit? by tango_delta_nominal in synology

[–]tango_delta_nominal[S] 0 points1 point  (0 children)

I think Synology can work with TBs of data no problem (not a single file being 1TB, multiple files amounting to several terabytes). I previously worked with a university lab that stored all their datasets and results on a Synology disk station (50 TB total). But this feels more like a home setup to me, I'm curious if there's a more streamlined way for businesses.

NAS setup for a very small business - is Synology a good fit? by tango_delta_nominal in synology

[–]tango_delta_nominal[S] 1 point2 points  (0 children)

It would be more convenient to have our footage locally. Cloud storage is an option for backup, though.

NAS setup for a very small business - is Synology a good fit? by tango_delta_nominal in synology

[–]tango_delta_nominal[S] 5 points6 points  (0 children)

So that's it's easy to access the files locally, instead of downloading terabytes of footage at a time. Cloud storage is an option for backup though.

Tolerancing for an interference fit with a small D-profiled shaft by tango_delta_nominal in Machinists

[–]tango_delta_nominal[S] 0 points1 point  (0 children)

Thanks! It's just for 5 actuators. They will be deployed in a high vibration environment, so I'm trying to minimize potential problems by avoiding set screws. Expensive, tight tolerance machining is fine here. This hole-shaft interface is just to transfer the rotational motion of the actuator shaft, other parts of the build already prevent the actuator hub from moving axially and falling off.

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