A heat sink?

 

It is a high current pad. Also often used for gnd (mounting holes).

 

Mounting hole for the board.
HiLetgo voltage detection module for Arduino. AKA a voltage divider.
Module

 

It is a high current pad. Also often used for gnd (mounting holes).

Solder pad?

View attachment 356399

So it's a screw-hole?

 

So it's a screw-hole?

Yes, but a non-insulated pad. Probably used to carry current in the bolt/screw. Sometime used to carry heat away from a hot part.
Yes, a screw-hole.

 

[QUOTE="johnyradio, post: 2002416,
So it's a screw-hole?
[/QUOTE]
Yes, as seen in the photo in post 3
I don't see any electrical connection to anything else on the board.
Just a fancy screw hole.

 

[QUOTE="johnyradio, post: 2002416,
So it's a screw-hole?

Yes, as seen in the photo in post 3
I don't see any electrical connection to anything else on the board.
Just a fancy screw hole.
[/QUOTE]

It's probably a stock footprint that they use for a lot of products. On some of them, it's also a high-current electrical connection and/or is for thermal conduction. On this one, it's neither, just a mounting point.

 

HiLetgo voltage detection module for Arduino. AKA a voltage divider.

Is there anything besides resistors on this board? I think resistors alone don't make a voltage detector.

 

Is there anything besides resistors on this board? I think resistors alone don't make a voltage detector.

No, just resistors, however, let's look at a description:


Product Description
Description:
This module is based on principle of resistive voltage divider design, can make the red terminal connector input voltage to 5 times smaller.
Arduino analog input voltages up to 5 v, the voltage detection module input voltage not greater than 5Vx5=25V (if using 3.3V systems, input voltage not greater than 3.3Vx5=16.5V).
Arduino AVR chips have 10-bit AD, so this module simulates a resolution of 0.00489V (5V/1023), so the minimum voltage of input voltage detection module is 0.00489Vx5=0.02445V.
Voltage input range: DC0-25 V.
Voltage detection range: DC0.02445 V-25 V.
Voltage analog resolution: 0.00489 V.
Output interface: "+ "connected 5/3.3V, "-" connected GND, "s" connected Arduino AD pins.
DC input interface: red terminal positive with VCC, negative with GND.
Package included:
5* DC 0~25V Voltage Detection Module


Actually it's a 5:1 voltage divider module and not quite a voltage detector.

Ron

 

There are 10 types of people in the world: those who understand binary, those who don't, and those who can work in any number base.

Don't you mean 11 types?

 

Don't you mean 11 types?

Nope. Your question indicates that you understand binary, but aren't one of those that can work in any number base.

Think about it.

 

Nope. Your question indicates that you understand binary, but aren't one of those that can work in any number base.

Think about it.

You say "3 types". Binary 11 = 3

00 = 0
01 = 1
10 = 2
11 = 3

 

You say "3 types". Binary 11 = 3

00 = 0
01 = 1
10 = 2
11 = 3

And, again, you demonstrate that you might be able to work in binary, but that you can't work in any number base.

 

And, again, you demonstrate that you might be able to work in binary, but that you can't work in any number base.

Hmm....

The phrase "any number base" in the riddle is the final hint that you need to shift your thinking away from the decimal system to find the solution.
- google AI

If this is the explanation, seems pretty weak.

"...and "those who can work in any number base": This is an add-on that adds another layer of cleverness. It introduces a third type of person, suggesting that some people are so skilled in mathematics and computer science that they can think outside the limitations of any one system. This person can see all the possibilities and understand the joke from every angle.
- google AI.

Also weak.

the worst science joke I ever heard.
https://forum.allaboutcircuits.com/threads/car-battery-cable-puzzler.188948/post-1764369

- possibly accurate

 

Hmm....

If this is the explanation, seems pretty weak.

Also weak.

- possibly accurate

Come on. Think about it.

Clearly, the claim lists three kinds of people.

Clearly, the implication is that most people will likely initially infer that 10 is in decimal (since this is how we automatically interpret '10' in every day life), meaning ten kinds of people, but that will get rejected almost immediately since the list is clearly much shorter than that. Also, we are used to hearing, "there are two kinds of people...." so, with the mention of binary, people will tend to get fixated on '10' being in binary since they expect it to mean two, but will then be unable to break out of that mindset (sound familiar) when they see that there are three categories in the list and then insist that the number must be '11' because it must be in binary.

The huge, glaring hint is that the correct interpretation requires using a number base other than binary.

So, let's see.

If '10' in decimal (a.k.a., base-10) means ten, and if '10' in binary (a.k.a., base-2) means two, can you at least speculate on a number base, k, in which '10' in base-k means three?

 

you at least speculate on a number base, k, in which '10' in base-k means three?

Aha, base 3 10 is base 10 3.
Good one.
But the conclusion "you can't work in any number base" is an illogical conclusion.

 

Aha, base 3 10 is base 10 3.
Good one.
But the conclusion "you can't work in any number base" is an illogical conclusion.

Illogical or not, it was obviously quite accurate.

Someone that can work in any number base only has to think about that statement for a few seconds to figure out that the '10' in that statement is in base-3.

People that can't work in any number base often had to be led by the nose to see that.

 

I have seen this type of pad used on supercapacitor balance boards.

 

OK Spock just screw the damn board..

 

Illogical or not, it was obviously quite accurate.

Illogical conclusion. Someone who is not accustomed to thinking in base systems other than decimal won't recognize 10 as binary. That does not therefore mean that they are incapable of learning to work with binary.