Typically, for most extruded standard aluminium cases, there are rails on both sides of the case, in which you slide the PCB. Once you close the openings, the PCB can't move anymore.
Example:
You see the rails in the middle of the sidewalls. Sometimes, there are several rails, so you can choo...
Well, that's the answer link, nevermind.
This question has been edited, which makes my answer (the crappiest answer I've ever made) even more crappy and outside scope.
Because the guy wants his question reopened.
Basically, this makes this whole page (the answer, the question, everything) a huge invalid mess.
For me there is no doubt that one of the most time consuming tasks when it comes to produce a new board is going from a ratsnest to the final layout.
I must admit I am not an expert, but to me it takes days, and I would never ever be able to do it without the aid of Kicad, even for circuits of mo...
I kinda like how this is in a sense a bootsrapping process. No EDA, no complex processors. So first build something complex by hand, then use that to build something that can build something that can...
@PlasmaHH I wonder if there is a term or word to describe that progression (other than bootstrapping)
It is surprising how many inventions are really improvements. Until a game changer invention comes along which is much less dependent upon previous progress
. . There was a television series hosted by James Burke that would show how a series of inventions built upon each other, over centuries, and resulting in surprising results. topdocumentaryfilms.com/james-burke-connections
@Marla In a brainstorm meeting for a website idea (basically wikipedia but explaining how to build it, for everything and then referenceing to the pages of the "Ingredients") we draw some graphs of things depending on each other and noticed that fora long long time there hasn't been much that didn't depend on previous things
so take that website (if it existed) dump a large population with it on an uninhabited planet, and it will likely still take hundreds of years to recover ^^
@dim The reference was for Archimedes (greek science). Upon realizing buoyancy (floating), he was so excited he got out of bathtub and ran into the street shouting Eureka ( I have found it ).
english is one of the languages that have a word for everything, but nobody using them.
in contrary to german, where there are words for most things, and for the rest everyone makes them up, and they end up making up all the same word for it.
@TheNoonMoose ah yeah, with that day where the rest of the world holds breath and looks if finally someone has the balls to blow something up for good? ^^
I'm about to embark on an educational exercise, and I'd like to teach about Wheatstone Bridges. I'm a bit stuck on what to use for an inexpensive resistive sensor with very low sensitivity, such that a bridge would make sense. We're talking a real need for "readily accessible" and inexpensive. Any suggestions?
@ThePhoton Not unless I can find a really cheap strain gage that's incredibly inexpensive and dirt simple to mount. We're talking "to the masses" here. I'm thinking maybe something a kid can slap together out of conductive foam.
@Marla Actually, repeatability isn't necessarily important
@ScottSeidman Well you'd be looking for a crappy strain guage, not the latest high-sensitivity design. Maybe something you (or a student) can make yourself.
@ThePhoton Maybe some conductive foam and alligator clips would do it. I was thinking that would be too sensitive, but using it to detect taps instead of heavier pressure might be good.
@ScottSeidman perhaps a length of steel wire (generic baling wire). Not knowing the range of resistance you are thinking of (wire in series with a resistor). Then have the kids repeatedly bend the wire. (Kids like to break things). Resistance gets higher with temperature. Or, if fire is allowed, let them heat the wire with a flame lighter. Very Low Sensitivity
@ScottSeidman I'm thinking of maybe getting a sheet of conductive rubber EMI shielding material and rivet copper contacts to it. But I'm getting the idea that might be too much investment for your use case.
I like the idea of the water, though different water sources would have different conductivities so one would want to make sure the bridge could be "zeroed" to different concentrations of ions... maybe a setup with a control glass and a varying glass?
but the stepper motor works to control these guide vanes that control inlet gas for a compressor for refrigeration
Well, you can do that in your free time - you're looking more at the maker culture... but if you want to do a good job with electronics a formal education and job experience certainly would not hurt
Basically you have to study systems and components in depth if you want to make a good design. If you want to make a design, well, go on the internet and copy someone else's
Well, there is a whole "maker" hype that I mentioned earlier, and Arduino has a LOT of tutorials everywhere if you want to make stuff fast... but if you want to make proper designs it'll take experience and knowledge, which you'd probably want to study theory
Then I took out the battery of a phone that the battery doesn't work, and plugged it into the phone and I was able to turn it on! At that point I knew I wanted to work with electricty
You can get around everyday limitations with electrical knowledge
from some reading, I gather that electrical engineering is simply a designer. electrical technician is hands-on person who works directly with physical electronics. electrician is someone who works with electrical appliances. are these accurate depictions?
Well Lakitu, I've been in college for one year as well. I've asked extensively around to all the older, more experienced people, and they told me something pretty interesting
More or less, what you study now doesn't matter since 1. You don't know what your interests are and you can't figure out easily. 2. Your interests will change over time
I do not think you will think so happily of electrical engineering when you are staying up late wondering why you can't do a basic circuit analysis problem ;)
If you put you hands across a 12 volt car battery nothing happens. If you put a wrench across a 12 volt car battery you make a loud sound and very possibly seriously injure yourself. Why? Ohm's law.
But @Lakitu , it seems like you're asking a lot of basic electricity questions... my advice to you is to check out the websites that we've linked you to before coming on the chat... most of the users here are practicing engineers that ask questions that are very specific... you're essentially going to a high class chef's kitchen and asking them how to make a basic sandwich
The countries we build dikes for in the 1850's and 1900's are now flooding, due to lack of maintenance... yet we lie further below sea level, and we have hardly any issues
but if you're dead set, well, it's pretty easy to get an arduino or what have you to appear as a "human interface device" and then it's just a matter of figuring out what key is pressed with the arduino and sending the info to the computer
@Asmyldof Eat the dessicant. It will release the organic content in the gut, while the mineral portion will pass through. At least, you'll get something out of it.
@NickAlexeev If you had a nontoxic dessicant that absorbed more water than alcohol you would have a handy dandy home distilling kit in a jar. Probably wouldn't use it on beer but maybe pitch yeast into a bucket of apricots and leave it in the basement for a few weeks, see what happens.
@ThePhoton Silica is non-toxic, and it can be used as a dessicant.
Fun fact: alcohol and water boil as an azeotropic mix. As a result, it's not possible to get more than 96% alcohol by distillation alone. The remaining water can be removed by a dessicant, though.
Typically, for most extruded standard aluminium cases, there are rails on both sides of the case, in which you slide the PCB. Once you close the openings, the PCB can't move anymore.
Example:
You see the rails in the middle of the sidewalls. Sometimes, there are several rails, so you can choo...
