I sort of hate relays. For 12VDC and a light load, I might consider a depletion-mode MOSFET and a diode to protect the battery. Much faster switching time than a relay, and quite probably lower internal resistance! Also no moving parts and much lower current consumption. There are some cases where it’s not appropriate though.
Anyway, I looked through the datasheet and you’re right – no mention of wear and tear from just leaving the solenoid energized, only from switching. Failure time also seems to increase when switching high currents. Since you don’t seem to be doing either of those things, I think you should be in the clear.
I was thinking about that, but if they are using 12VDC + light load a MOSFET would be more cost and space efficient, and probably more electrically efficient too. No real voltage drop, and just a few milliohms added to the load.
I mainly use SSRs to switch mains power, although it’s true they can be used for other things too.
Those wet solder sponges cause a thermal shock every time you wipe the tip. I recommend using brass windings instead. They also won’t completely wipe the solder off the tip either.
You always want a small layer of solder on your tip at all times to prevent it from oxidising. Oxidation means bad heat transfer causing soldering to be much more difficult. Also store it with a small blob of solder on it.
You should avoid scraping or sanding the oxidation of the tip. There is a small layer of silver that won’t oxidise so quickly but below that is normal iron. Not sure if that applied to cheaper Chinese irons but it’s better not to learn bad habits. Once you remove the silver layer you’ll get oxidation much more quickly and you’ll have to keep scraping until the tip is gone.
You can remove oxidation with the brass windings much more easily than with a sponge. When you apply solder with flux the rest of the oxidation should come off fairly quickly.
Buying a cheap model to practice is a great idea, when you are used to that you can look into a better iron. I’ve been very happy with the TS100 but the Pinecil is the newer model apparently.
Can you link to the code you’re running? Also, if your circuit is more complicated than just the sensor connected to the Arduino, can you show a schematic that can be viewed on mobile without kicad available?
Maybe you can use this to find more connectors that could match yours: connectorbook.com/identification.html?m=NT&n=lo_p…It has a pretty handy identification tool (you can even browse by pictures). It usually suggests quite an amount of connectors but it can guide you in the right direction and you can look at the according datasheets to find out more. By the way the creator of this community made that homepage and a book related to it (or probably the other way round 😅).
It’s a 2.5” SAS drive. They’re usually used in servers and typically spin a lot faster than consumer SATA drives. You won’t be able to use it in your PC unless you buy an HBA card and some adapters.
I got a used 8 port card from ebay for about $20 a few years ago. I had to flash different firmware to it using a DOS boot disk to disable raid though. It’s an obsolete card, but it’s been working fine in my NAS.
Why yes it’s a SAS drive. You can find that in some NAS models for home use too. Otherwise this is usually server land.
The thing with HBAs is that you usually only get virtual disks on the system side because the controller masks the real disks. This is not really needed any more since modern filesystems can do RAID functionality too - and even better and faster - but that does require direct access to the drive.
Many controllers can be patched though or come with a pass through (JBOD) mode out of the box, which allows you to use that kind of drive directly again. Such drives can be obtained used for cheap too so this may be a feasible option to extend the possible amount of drives for a desktop computer at home too a lot. Most controllers support 4-8 devices.
No. SAS is a different protocol and requires a different host controller. SAS controllers can typically handle SATA drives, but not the other way around.
If this is for a server or desktop machine, you could install a PCIe SAS HBA.
Looks like that’s actually “SATA Express,” which has lanes for both PCI and SATA - if you look at the other side of the connector (which you should have already shared!) you’ll see even more contacts. You can get either a PCI or SATA adapter in order to use the drive.
Edit: Probably SAS as others said. It uses the exact same connector, which is why I made that guess.
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