-7
\$\begingroup\$

So I want to create my own electronic parts from scratch,I don't like buying stuff from internet because it's mostly expensive and I believe if you make it yourself its more cheaper. You might ask what I mean by electronic parts. The simple ones like Ultrasonic sensor,Servo motor and other type of sensors. Yeah I know there is factories out there making that stuff and making one by hand is hard and sometimes impossible due to small size.So my question: where do I find book,pdf or something that tells me how to make them?

If there is no answer to what I ask above then I highly need schematics for that kind of things(ultrasonic sensor for example).Very detailed and serious,not basic things that show only visible areas. I believe its written in academic books and are taught in universities but right now I don't study in good university so I don't have that kind of books.I mean if there is factories out there building that small electronic parts there have to be any FULL manual,schematics or design for that things. Where I can get that schematics or specific books that show how they work,designed,which materials,sizes of specific areas etc?

In the end my question is very easy,that factories have some information on how to make some exact parts(like ultrasonic sensor),where do I get that information too?

\$\endgroup\$

closed as too broad by Matt Young, Daniel Grillo, PeterJ, Dave Tweed Jan 20 '16 at 14:17

Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

  • 3
    \$\begingroup\$ Good luck. To get anything like the quality and reliability of purchased parts, you are going to need a garage full of special tools, materials, and chemicals. An ultrasonic sensor, for example, will need a particular type of crystal with electrical contacts bonded to it such that the current generated in the crystal actually flows through the wires. The information is certainly to be found, but it will be difficult to get it all together and learn the manufacturing techniques needed. \$\endgroup\$ – JRE Jan 18 '16 at 16:00
  • \$\begingroup\$ Thanks,yeah I know and said sometimes building it is impossible,but at least I want to know what is inside it,what material,size,etc,etc in here.Like for example you told me about crystal.How did you get that information?Where I can learn too \$\endgroup\$ – Huseyn26 Jan 18 '16 at 16:02
  • \$\begingroup\$ I'd start with the oldest books you can find on the subject, and look for academic papers on the same subject. Lots of old stuff can be found for free on the internet. Old stuff, because it will be more in line with what you can do in a home workshop and because modern techniques are proprietarty and generally require a factory full of people to make use of. \$\endgroup\$ – JRE Jan 18 '16 at 16:08
  • \$\begingroup\$ Here's someone making a field effect transistor: hackaday.com/2010/05/13/… \$\endgroup\$ – JRE Jan 18 '16 at 16:08
  • 6
    \$\begingroup\$ Why are you so sure you can make something cheaper than you can buy it, if you have no clue how to make it? \$\endgroup\$ – Matt Young Jan 18 '16 at 16:16
3
\$\begingroup\$

"it's mostly expensive and I believe if you make it yourself its more cheaper."

Then by all means go ahead and do so.

I think you have a very strong and very wrong opinion about these matters.

I think you have been looking in the wrong places. If you want cheap electronics parts, shop on ebay.

"there have to be any FULL manual,schematics or design for that things"

Wrong again, have you never heard of the term "company secret" or "patents". If you design something clever you do not want everyone to be able to just copy it and sell it. You want everyone to come to you to buy it ! There are of course some open source parts but most of these are not intended for commercial purposes and/or mass production.

\$\endgroup\$
  • \$\begingroup\$ what about parts that have been in earth from like 1900s?Like companies that build that parts don't exists anymore? and you know there is many factories,how come they all have very similar products?So they all know the technique ,how one new company learns when other is keeping that secret? Ok may be I am wrong in my second paragraph,but what about old 1900s electronic parts? \$\endgroup\$ – Huseyn26 Jan 18 '16 at 16:06
  • \$\begingroup\$ What 1900s electronic parts ? Please give an example. \$\endgroup\$ – Bimpelrekkie Jan 18 '16 at 16:10
  • \$\begingroup\$ If you still want to buy cheaper,then try Alibaba,aliexpress.They are very cheap when compared to e-bay.But not gurantee for original. \$\endgroup\$ – Aadarsh Jan 18 '16 at 16:10
  • \$\begingroup\$ Yeah to be real actually I don't know any example,may be that is my mistake but as you said earlier I have strong belief that it can be done,ok for example some simple part in old cameras that worked with tapes \$\endgroup\$ – Huseyn26 Jan 18 '16 at 16:14
  • \$\begingroup\$ "I have strong belief that it can be done" In engineering, "believing" is usually irrelevant, in engineerign we want proof. So prove your statement. My counter-proof is that in the old days components were much-much more expensive than they are now. \$\endgroup\$ – Bimpelrekkie Jan 18 '16 at 16:21
3
\$\begingroup\$

If you want to make something fairly simple, it's easy enough - I was seriously contemplating making some low-ohm power resistors from strands of steel picture hanging wire when I discovered that I'd ordered the right value, been invoiced for the right value, and something a factor of 11 different had been shipped (and then sat too long to be returned without my having noticed that they were not what they were supposed to be.) After some basic testing of my bootleg resistor approach I ordered some from eBay - I could make it work if I had to, but it's not time efficient, and that's not money efficient...

The tales of the many odd things that will work (or work somewhat) as a diode is pretty common in "crystal radio" literature. I have my doubts about using most of those for rectifying a power supply. Various things make crude capacitors fairly easily - aluminum foil and waxed paper, for one example. Even those get hard if you are locating and mining the bauxite to produce the aluminum and then rolling it into foil yourself, and cutting the trees to make the paper, and drilling oil wells for the petroleum-based wax. Especially if you also have to find and mine the iron ore and smelt it to make the iron and steel for the machinery.

If you'd like to make crystals (either for piezo discs as used in ultrasonic sensors or for timing crystals), you can buy some high quality quartz, or shovel some sand into your handy quartz-crystal-growing-oven, cut it at precise angles with your diamond saw, pop it in your vacuum-metalization chamber to plate some contacts on it. This will not be cheaper than buying a crystal/piezo/etc. until you are at a scale of millions of parts, assuming you can actually develop the skill to produce useful parts at all.

Following the suggestions to look at old stuff, if you are willing to invest a certain amount you could potentially make vacuum tubes (assuming you were willing to buy some stuff) for only a few orders of magnitude more than you can buy them, and you'd hit "cheaper than buying them" at a much lower production volume - if you did a good job you might even be able to sell them and make a profit (some folks still like them for certain applications.)

\$\endgroup\$

Not the answer you're looking for? Browse other questions tagged or ask your own question.