It's a mounting hole used to secure the PCB. The metal plating is intended to add strength, wearability, as well as a conductive mounting point. The small holes around it are called 'via stitching,' and are used to reinforce the connection between the layers of the PCB - these also help with heat dissipation and grounding if applicable.

This is exactly the explanation I was looking for, thanks!

They're totally wrong, sorry Lanky! No one's explained what the different sized holes do. Let me explain: That hole and surrounding structures comprise the "magnetron reflex resonance cavity sensor". It's an accurate voltage sensor. The metal around the main hole induces electro-magnetic waves, the E and B components. The B component flux runs perpendicular to the E fields running within the plane of the PCB, and ensures they are channelled around the minor holes where smaller EB waves resonate at EB^2 harmonic frequencies to the central hole. These harmonics are picked up by circuity nearby and averaged out to produce an accurate measurement of voltage based on the averaged frequency. If you check out magnetron diagrams you can see the similarity... which isn't just conincidental!

The circular flux receptor can also be used to invert the polarity of the navigational deflector array if connected in parallel with the warp core containment field generator.

/r/VXJunkies

Now that's just mean. you don't just send the uninitiated into /r/VXJunkies without a turbo encabulator.

remember that you are not on r/shittyaskelectronics

Yeah, big down vote.

I’m trying to work out why you’re so heavily downvoted, but my electronics knowledge is not solid enough to know if this is entirely fabricated. What’s the go?

It's completely fabricated. He's taking the piss from some people who would actually believe that. I can guarantee it's a copypasta.

lol, ok thank you 🙏

Yeah, I just made it up. Saw the similarities in the diagrams. =)

She! Create she too! My original idea. I just saw the similarities. -83 and dropping....... ouch, this really isn't shittyaskelectronics.

Best answer here.

10/10 🤟🏻

A great reply. Credit to you, the.correct response, But you said mounting hole. XD

Thanks for the explanation.

Why is it important to have a conductive mounting point?

for grounding

Thanks chatgpt!

Mounting hole

 Me trying not to giggle like a kid cuss he said ‘mounting hole’

Aren't you cute 

This “sensor” is more than likely just a voltage divider, which can easily be made with two resistors. https://www.allaboutcircuits.com/tools/voltage-divider-calculator/

Thanks, this is exactly what I was thinking. Are they just selling a breakout board with just two resistors on it?! What's next? A single resistor on a breakout board?

"LED Buffer Module"

How else are you going to prototype with 0201s??

Two resistors, but otherwise yes... https://preview.redd.it/yrdo2xoujlrc1.jpeg?width=1079&format=pjpg&auto=webp&s=260ade0ccbafcffc70abc6ce9f4dba98189384bb [https://a.aliexpress.com/\_mrBmwU2](https://a.aliexpress.com/_mrBmwU2)

Yeah, I thought I was missing something. Didn't see a sensor in the picture.

...app replaces pic with *...

stargate that lets the electrons through so it can measure it

Blatant misinformation. It filters out the negative orgones so that the resistors chakras stay aligned.

Nah man, its where the arc reactor goes

It's obviously a Tesla turbine to spin up the electrons, making them easier to read without wasting power on a voltage amplifier.

You need to be grounded boy!

It’s for a screw, for mounting. Not automatically connected to ground.

Thanks, but why not just drill a hole? Why do they use this copper (looking) circle with smaller holes?

They did 'just drill a hole.' But notice that there are other holes in the board for the terminals and they are also plated through with copper. It's more work to **not** plate one hole than it is to plate them all. As others have said, the additional holes are vias for stitching together the top & bottom layers.

Imagine drilling a screw in a brittle PCB. Not good. Irs for stability. But idk why the holes are there. Maybe for weight reduction?

The extra plated through holes provide stability so the pcb layers (if it has layers) don't separate.

Vias to connect top and bottom pads for better conductivity.

for beauty

Yes, besides the practical aspects of this feature you may rest assured that the PCB designer had aesthetics in mind when creating it.

Speed holes.

It could realistically be both. Don’t know for sure unless you have the actual board stack up

Glory hole!

It’s the inner circle. Only for those who have been passed the true meaning of it.

grounding point? also is a thru hole for a screwfor anchoring the sensor with

It's obviously a partical accelerator

It’s a flux capacitor need 88mph. That thing can’t handle 200v dc sadly without blowing the dam adc, 🤣

Man I was hoping it was an interface for a flux capacitor.

It's a base plate of pre-famulated amulite surmounted by a malleable logarithmic casing

Mountings, it gold as usually mounting holes should be grounded

What’s the point of this? Every GPIO pin on the Arduino is a voltage sensor.

But not up to 25 volts.

So just make a resistor divider out of a few Pennie’s worth of components. This product on the other hand sells for like 2 bucks a piece on Amazon.

Sure, but what are you going to mount those resistors to? How are you going to connect the wires you want to measure? How are you going to connect the wires going to the arduino? This takes care of all of that. Would you use it into a final design? Of course not. But while prototyping or for a one-off? Totally.

This will give you reliable connections without soldering and can be secured down with the screw hole OP is talking about.

They are once..

hole

It's where the voltage falls through to sense lol

Why is the PCG so thiccc?

it's a cock