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.
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.
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.
Can you show us the other side of the drive? Curious what make/model this is supposed to be. Best guess is that this is yet another attempt by a PC manufacturer to sell un-upgradeable units that need to be either replaced as a whole, services only by then, or had at with wire snips and a soldering iron.
I’d say it’s time to carefully cut out that tab (leaving the keys intact), and to start being more careful about what you buy.
I recommend EEVBlog’s OpAmp tutorial. His explanation is pretty simple to understand. Basically there are two rules (note these rules are ideal, but the exceptions can usually be ignored):
No current flows into the inverting and non-inverting inputs.
For negative and positive feedback circuits, the OpAmp wants to keep the inputs the same by changing its output, and will sink power to its positive or negative power rails to achieve this.
The oscillator is creating both DC and AC. The DC component is the average value of the signal. In the case of your 0-10v square wave, that is 5v. The AC compnent is the part of the signal that changes. The effect of the capacitor is to block the DC component, leaving only the AC component. The waveform is shifted vertically to be centered around 0v.
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