Feel free to explain how I was rude.
I only explain what the problems with breadboards are.
But sure, I can back it up even more if you want.
Definition of breadboard
Everywhere you read about breadboards they are explained as “temporary”, “experiment”, and “prototype”.
I have read on Wikipedia and a few manufacturers explanations, and none of them use any other wording.
None of them use “long time use”, “permanent” or anything like that, but if you manage to find any wording like that, please post a link I genuinely want to see it.
I have seen Adafruits perma-proto, but that is in my opinion more like a perfboard than breadboard.
The parts that make a breadboard
The breadboard is built up of three main parts. The plastic case, the clips inside the case, and the backplate.
The backplate is supposed to be attached to the adhesive on the back of the breadboard.
Sure, you can use the adhesive to stick the board in a case, but that is not the purpose of the adhesive.
I have known since before that it is hard to find specs but now I really went out to try and find some.
It is hard. I found one manufacturer that listed the max current. All the others I found had no listings at all.
And I looked at resellers, the manufacturers page and the datasheets (if found). Nothing.
However on Wikipedia (I know it’s not a reliable source, especially since there is very little datasheets with information) it says: “Typically the spring clips are rated for 1 ampere at 5 volts and 0.333 amperes at 15 volts (5 watts).”
I believe that most (me included) have bought their breadboard as a no name and have no clue what the rating is.
The clips inside a breadboard can also be of different quality. Some are better but most of us that has used a breadboard for some time has noticed how the clips sometimes not work as they should.
Sometimes there is no tension at all and sometimes you need to force the pin in there.
These clips work like any other clips, they are forced to a position so that when you insert something you put strain on the clip and the clip grips on.
This also means it works like anything else of similarity, such as springs, paperclips and rubber bands to mention some. All these products will at some point “set” a new default position if under constant load.
Wrap a rubber band around something and leave it overnight and tomorrow it will be slightly larger, same with paperclips and springs.
Because these clips are made of metal there is one thing that can speed up the process of “expanding” them, that is heat.
If you heat up metal at the same time as you put load on it then it will quicker and easier set to this position than without heat.
In this case the heat can come from the current.
If we believe that 1 ampere is the truth, then pretty much any motor plus an ESP chip will be on the limit or above the limit of the breadboard.
Even the smallest servo motors can peak at 7-900 mAh when under load.
The current will create heat that can/could help to set a new position of the clips which means it will not be as tight as it used to be.
This will not happen in one day or perhaps not even a week or month. Who know? But it will happen.
If you are sloppy (I admit I belong here) when pushing in the Dupont wires in an angle, then that could mean it opens the clip more than the width of the pin. If the clip sets in this position, then it will be very loose.
There are dangers in using breadboards for “finished” projects as mentioned above. I am not saying it will all burn but there is a downside to the “easy” way.
Also keep in mind that using them as finished products means you are using them outside the manufacturers/general scope, i.e. they are meant for prototyping/experiments/temporary usage.
To be honest, I believe that if you do not touch the breadboard then nothing bad will happen. If the clips set a new default position and the wires are slightly loose then no harm in that if it is not touched.
But the irony of it all is that enclosing it in a case, which should be the safe way, means you do not see if the cables/parts fall out when/if you move the case.
If you do not agree with this and swear by breadboards can live forever then I will not argue with that, I’m just saying that is outside the scope of the product and there can be dangers with it.
Just like driving without a seat belt. You can be fine all your life doing that (no pun intended), but it can also be deadly on the first drive.