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Discord Now Fully Linked With 420chan IRC

Learning to recycle old electronics (components)

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- Tue, 14 Nov 2017 19:16:29 EST zIm1Srig No.7158
File: 1510704989121.jpg -(130727B / 127.66KB, 931x685) Thumbnail displayed, click image for full size. Learning to recycle old electronics (components)
HI guys. This board seemed more suitable than /tech/.

My dear dad just passed away. He was an electronics hoarder (according to my mom at least). He collected a ton of broken, old or discarded but still working electronic equipment in my parent's garage. My dad was more of a collector than electrical engineer. He knew how to solder neatly and could name some components and what their specs meant. But he never really made anything out of his collection. One of the few things I remember was him fixing a radio that needed a component change.

My mom wanted to throw away all the "junk" when dad died, but I ended up taking most of them. I love electronics but I've never been good at them on a technical level. I'm more of a software guy. I know my basic electronics from physics class up until ohm's and kirchoff's laws. I can read a circuit diagram and have some clue about voltage, current and resistance. I'm not a complete noobie, but I'm still really really bad at electronics and have no idea how to approach a project.

I wanna recycle the old stuff my dad left. Salvage individual components, test to see if they work, organize them according to their properties, and make something new from them. My dream for a while has been building a radio transmitter. I've already got a super cool AM/FM receiver that can do all sorts of magic tricks but I lack a transmitter. I've done some googling, but a lot of it flies over my head.

So, I need sources about electronics. I want to learn. My dad left me a soldering iron so I got that covered. I probably should get some tools to remove singular components from circuit boards. The biggest issue is finding out if the components are still functional. Some of the stuff is from the 60s! Any easy way to do so?

Sorry for being all over the place with this post. I only took the mandatory electronics classes so I'm pretty intimidated. No clue where to start building my radio for example. Should I just pick everything apart and then start assembling components that fit together? There are plenty of radio transmitter schematics online.
5 posts and 2 images omitted. Click View Thread to read.
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David Faddlelock - Fri, 06 Apr 2018 08:53:19 EST gG97Tn7x No.7188 Reply
1523019199420.jpg -(23390B / 22.84KB, 306x400) Thumbnail displayed, click image for full size.
The Art of Electronics, by Paul Horowitz and Winfield Hill, is a good start, and there's a complementary text, Student Manual for The Art of Electronics by Thomas C. Hayes and Paul Horowitz.

Apart from that, you could ask around at Lainchan, that's where all the cyberpunk kids hang out.
And I mean the real Lainchan.org, not the graveyard copycat at .jp.
>>
Phoebe Magglegold - Fri, 06 Apr 2018 14:27:59 EST IZhvBj47 No.7189 Reply
>>7188
>Lainchan.org
The first thread on their programming board is about FORTH
lol, shit, thanks dude I can't tell if I should smile or cry.
>>
Betsy Hizzleforth - Wed, 25 Apr 2018 04:33:23 EST lErcgTIf No.7193 Reply
>>7189
De nada, Lainchan is a well kept secret. Lord knows they could do with more tech traffic and less drama.

Jobs

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- Thu, 18 Jan 2018 19:16:58 EST +f2IvV05 No.7163
File: 1516321018747.jpg -(72469B / 70.77KB, 750x564) Thumbnail displayed, click image for full size. Jobs
Just got my first job offer for an equipment engineering position. BS in mech eng. Debt free thanks to uncle sam.

55k/yr + EoY bonus, avg 8k
company car + insurance/maintenance/gas
paid expenses for travel around the country and internationaly (mexico, canada, japan)
company credit card
phone allotment
health/vision/dental

with a 2.81 GPA that they didn't even ask about.

stay in school nerds.
1 posts and 1 images omitted. Click View Thread to read.
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Reuben Fenkinketch - Wed, 28 Mar 2018 13:45:32 EST 57dUc+ts No.7184 Reply
>>7179
They told me in my school's career center that 55-60k was what could expect starting out and with that eoy bonus I'm looking at 60k at least. Glassdoor says 67 in Ohio though for entry level mech eng.... I'll be looking for a new job in a year or two anyway. This isn't a very interesting job tbh. Not nearly as much design work as I'd like.
>>
Samuel Dirringdale - Fri, 20 Apr 2018 10:21:19 EST OIsgto+6 No.7191 Reply
>>7163
55k/yr? thats cool bro
People that couldnt graduate highschool make 100-150k a year in the oilfields their first year.

Mech eng jobs in Dubai

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- Tue, 03 Apr 2018 09:26:07 EST w3XZoMCx No.7187
File: 1522761967859.jpg -(271199B / 264.84KB, 1600x1140) Thumbnail displayed, click image for full size. Mech eng jobs in Dubai
is the opportunity of mech eng jobs in dubai good? or maybe in other places in U.a.e.? what are the companies that are usually found there? i needed help cause i dont have much friends who know about engineering jobs there. if you have additional advice please do tell. i need all the help that i could get.
>>
Eliza Sucklesodge - Sat, 14 Apr 2018 09:18:01 EST l8g6dMpE No.7190 Reply
Well, if you`d want to work in oil, you can score a nice job there, besides that industry it will be a lot harder I guess

How fix roof

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- Sun, 25 Jun 2017 13:54:25 EST nZyDw8HR No.7137
File: 1498413265055.jpg -(407778B / 398.22KB, 1280x850) Thumbnail displayed, click image for full size. How fix roof
idk where to ask this but engineers pls help
i have this wooden shack in the garden and the roof is rotten and it leaks when storm.
i can patch it a bit with tar, but its wont be enough so..
tl:dr any advice/protip to fix leaky roof??
4 posts and 1 images omitted. Click View Thread to read.
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Jack Gomblesick - Mon, 12 Feb 2018 22:39:52 EST GMWUPGcJ No.7168 Reply
1518493192359.png -(755684B / 737.97KB, 1280x688) Thumbnail displayed, click image for full size.
>>7137
Tear out bad wood, put in good wood.
>>
Sophie Heggleworth - Mon, 19 Feb 2018 00:47:15 EST B5sChTdx No.7178 Reply
what kinda shit you keep in there? if outside airflow is ok then just get corrugated metal and bolt that shit to some 2x4's, job's done
>>
Phoebe Bigglelock - Sun, 01 Apr 2018 11:37:55 EST dCUgPqyh No.7186 Reply
This is actually an easy one.
Buy nail puller.
Attempt to take roof apart.
If you find you don't know what you're doing
Hire a fucking framer before you get yourself hurt.

Geeks

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- Thu, 25 Oct 2012 12:55:33 EST dKl95iv8 No.5036
File: 1351184133181.jpg -(29403B / 28.71KB, 261x320) Thumbnail displayed, click image for full size. Geeks
"Have fun sitting in front of a computer all day staring at a screen you silly CprEs and ChEs, leave the heavy stuff for the big boys"
Construction Engineers and Civil Engineers
34 posts and 3 images omitted. Click View Thread to read.
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James Farryson - Fri, 23 Mar 2018 22:41:44 EST uF4LZrh/ No.7180 Reply
1521859304107.jpg -(60227B / 58.82KB, 900x650) Thumbnail displayed, click image for full size.
>>5036
"just got my bachelors; 100k starting, any job i want, any field i want, any environment i want. enjoy being pigeon holed."

  • mechanical engineers
>>
Caroline Wodgewod - Mon, 26 Mar 2018 18:01:03 EST Y+2uaWNz No.7182 Reply
I’m a mathematical statistician...half my shit doesn’t even involve a computer.

Offshore expansion

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- Sun, 14 Dec 2014 18:42:04 EST y/HQD3oY No.6594
File: 1418600524061.jpg -(147984B / 144.52KB, 1614x935) Thumbnail displayed, click image for full size. Offshore expansion
Let's talk Sealand and other offshore constructions.

I'm no engineering expert, which is why I'm asking you guys this. If someone were to somehow acquire an offshore structure such as an oil rig, would it be possible to expand off of it? How would this be done? At what point would support struts be needed to hold up any extra land?

Yes, I was thinking about Outer Heaven.
12 posts and 2 images omitted. Click View Thread to read.
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Emma Dobberhetch - Wed, 14 Feb 2018 17:58:58 EST Gcu3ZTpB No.7169 Reply
1518649138474.jpg -(70135B / 68.49KB, 500x509) Thumbnail displayed, click image for full size.
Islands can be built using plastic bottles and foam. Then you can layer dirt and organic compost on top for growing things. if you need to expand, put another layer of bottles on top of the dirt, and start your garden over again. You will need to haul wood and other supplies from mainland for building shacks. freshwater catchment, alternitive energy.
pic unrelated.
>>
Sophie Heggleworth - Mon, 19 Feb 2018 00:43:26 EST B5sChTdx No.7177 Reply
>>7169

at first i thought this was yet another nature-destroying human abomination, but then i was pleasantly surprised and intrigued by the idea.
>>
Cedric Sollyford - Sat, 24 Mar 2018 06:01:40 EST XmsT5veL No.7181 Reply
>>6995
People who roleplay their own little polities should stick well to realizing the definition of a state includes the words "monopoly of force". Without that monopoly of force, you are little more than a conquest waiting to happen.

Making humanity great again

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- Thu, 15 Feb 2018 15:29:53 EST h+Bh4Jf9 No.7171
File: 1518726593748.jpg -(48311B / 47.18KB, 300x408) Thumbnail displayed, click image for full size. Making humanity great again
I started this thread for us to throw out ideas on human augmentation, how we as a race can be improved.
>>
bWolf - Thu, 15 Feb 2018 15:33:22 EST h+Bh4Jf9 No.7172 Reply
>>7171
what can be done from chemistry, physics, biology, biomimicry, engineering, implating nano tech. which steps would've have to take etc etc.
>>
Sophie Heggleworth - Mon, 19 Feb 2018 00:41:42 EST B5sChTdx No.7176 Reply
gotta cure cancer
>>
Sidney Chengerstock - Tue, 24 Apr 2018 17:03:14 EST B0ruPCF5 No.7192 Reply
>>7176
Dont need to cure cancer if we're all robots

Good resources for Beginning Electrical Engineering?

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- Wed, 19 Apr 2017 17:13:48 EST kZFkh/Yo No.7119
File: 1492636428153.png -(99393B / 97.06KB, 1386x730) Thumbnail displayed, click image for full size. Good resources for Beginning Electrical Engineering?
Hey /tesla/, Just started taking my EE Pre-Reqs and am having trouble keeping up with stuff like circuit design (ie, I have no idea how to do pic related).

I tend to learn by doing problems, so do you guys have recommendations for textbooks with circuit problems?
>>
Samuel Fagglehood - Thu, 15 Feb 2018 16:07:28 EST MRVxMXcW No.7174 Reply
I really enjoyed a game by Zachtronics called SHENZHEN I/O.
Great place for a beginner!

Mit open course-ware, go to MIT for free!
https://ocw.mit.edu/courses/electrical-engineering-and-computer-science/

Another MIT project is circuit lab, a great little tool to give your new found interests a playground.
https://www.circuitlab.com/

Trade schools often sell books/booklets for apprenticeships that really hammer in the maths aspect.

There is also a lot to be said for the hobbyist DIY communities for arduino and raspberry pi.
>>
Wesley Ballerware - Sun, 18 Feb 2018 13:21:08 EST dmDYXkOV No.7175 Reply
Finishing my certificate in EE. (Pre-Apprentice)

Delmar's Standard Textbook of Electricity is what we use. But basically any textbook involving is going to be the same, since electricity hasn't for hundreds of years.

Also, to solve that superposition circuit: Whoever thought using three power sources to learn superposition is a real asshole to the people who want to learn this type of stuff. You only need two to get the idea.

But in a really crappy way of explaining things because I'm really bad at this:

Basically sort out two of the VT and solve each circuit as its own, you must use Ohm's Law to solve I and VRs. You repeat this process for the other two VTs. Then you must find which way current flows on each separate circuit, it can easily be found with the VTs. After you solve the three circuits, you now put your current directions and VRs on all the resistors. From there, you can solve this problem.

I would solve this but I'm not gonna spend an hour working on three circuit superposition problem.

Civil Engineering

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- Fri, 09 Feb 2018 16:57:11 EST sC8vxqle No.7166
File: 1518213431586.jpg -(171694B / 167.67KB, 748x540) Thumbnail displayed, click image for full size. Civil Engineering
As is in the picture, why or what was the factors that made the construction go the loop rather than linear roadway?
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Priscilla Pellywell - Sat, 10 Feb 2018 18:04:00 EST ZOwxft1m No.7167 Reply
either the height difference was too great for such a short length so they needed a more gradual angle so they stretched it out with the loop, or its for safety so people dont go rocketing from an expressway onto a slower speed street, so they slow down to execute the loop turn
>>
Emma Dobberhetch - Wed, 14 Feb 2018 18:04:36 EST Gcu3ZTpB No.7170 Reply
>>7167
yeah, I think its for trucks to trucks slow down, so they don't run over all those people standing at the bottom of the bridge. there's also room to run another roadway under there.
>>
Samuel Fagglehood - Thu, 15 Feb 2018 15:45:09 EST MRVxMXcW No.7173 Reply
1518727509239.png -(297738B / 290.76KB, 1899x779) Thumbnail displayed, click image for full size.
>>7167
if you look at the other side its quite clear this is the answer.

The Peace Ray and Power Switch

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- Thu, 17 Apr 2014 16:32:33 EST LNG8f7Rs No.6253
File: 1397766753925.jpg -(4768B / 4.66KB, 194x260) Thumbnail displayed, click image for full size. The Peace Ray and Power Switch
First of all I would like you to share with me any of your ideas pertaining to particle based weapons. I do not care about efficiency.

Second: Has anyone thought about focusing whole cities worth of electricity to a single city block? What would prevent this and how destructive could it potentially be?
12 posts omitted. Click View Thread to read.
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Priscilla Turveyford - Wed, 30 Nov 2016 03:53:53 EST wXQYwiD/ No.7022 Reply
>Second: Has anyone thought about focusing whole cities worth of electricity to a single city block? What would prevent this and how destructive could it potentially be?
It would turn the air into plasma and melt/burn everything.
Prevention of an attack depends on the method of delivery. But I didn't propose any, I just told you what would happen.

It would probably be very fun to watch.. from afar.
>>
Acaelus - Mon, 06 Feb 2017 19:25:51 EST 2e0ggO16 No.7043 Reply
>>7022
Probably more fun from up close.

But yeah how would the "power" be transfered to the block? What specifically is it transfered to?

If it is just transfered to everything equally, how high and low would the power be transfered into the atmosphere/earth.

Title 24 Energy compliance/Thermal properties of CMU

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- Thu, 15 Jun 2017 23:56:29 EST ff47CWkA No.7135
File: 1497585389072.jpg -(9715B / 9.49KB, 300x268) Thumbnail displayed, click image for full size. Title 24 Energy compliance/Thermal properties of CMU
I'm trying to make constructions in trace 700 to match title 24 baseline requirments. Light/Heavy Masonry walls are giving me trouble. Its kind of a long shot to ask here but if there any Trace (or any energy modeling software) users that have done constructions for title 24 CMU's, I would appreciate a simple explanation of what you did to achieve baseline requirements for your constructions.

pick related

GD&T for Dumb-dumbs

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- Tue, 28 Mar 2017 22:02:10 EST LMSWX1C6 No.7114
File: 1490752930604.jpg -(54617B / 53.34KB, 456x406) Thumbnail displayed, click image for full size. GD&T for Dumb-dumbs
What are some of the best GD&T resources that don't make you want to shove a nail through your eyesockets?

I've got The Ultimate GD&T Pocket Guide, and it's not to bad, but still self-referential in areas, or doesn't go into enough detail on certain subjects.

I think CNCookbook has a GD&T course, and I know his stuff is usually straightforward. I'll have to check that out sometime soon.
>>
Shit Worringdock - Thu, 30 Mar 2017 12:51:10 EST IZhvBj47 No.7115 Reply
Your mechanical engineering high school textbook(s) perhaps?
I had 4 volumes, but they are long lost.
>>
Barnaby Gindlekag - Thu, 30 Mar 2017 14:19:18 EST LMSWX1C6 No.7116 Reply
>>7115

Never went to school for it, so no textbooks to reference.

Been in the manufacturing field working with my father as a kid, since the early 00's. The thing is that the old easy to read dimensional drawings are slowly being phased out in certain industries towards pure GD&T true position messes. It pays more if you're fluent in it, but it's certainly a lot of hieroglyphs that take time to get use to. .

Where to order custom plastic parts ?

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- Wed, 04 Nov 2015 16:48:00 EST mF3DWO7C No.6830
File: 1446673680037.jpg -(153916B / 150.31KB, 800x600) Thumbnail displayed, click image for full size. Where to order custom plastic parts ?
I hope this is the right thread.
1.
Can anyone link me to a company that does custom plastic parts ? I live in the EU if that matters.
2.
The part i need to order is a 10,5 x 10,5 x 1,5 box that is empty inside. How would you design a simple box like that so it would be nice to look at and access the inside?, Just make the bottom a different piece and add screw holders to the inside corners ? Also id like the product to be off the surface about 0.5 cm. What would be the best way to achieve this ? Legs ofc but any good ideas ?

If plastic molding is not the best option you can think of than what would be to produce around 50 of these kind of boxes for the beginning ? Was thinking about wood but it has to be commercially acceptable and if i need to make 50 boxes i am afraid they wont look all 1:1 the same hehh..

Thanks and dont mind the typos:) !
4 posts omitted. Click View Thread to read.
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Ernest Gabberstuck - Mon, 21 Nov 2016 15:07:37 EST nz8yEnGt No.7016 Reply
>>6830

>>6832

you can have them hydraulic pressed into forms that are in the shape and size of your desired plates, which you then glue or weld together. Also you dont even need it in the same size but you can cut them from bigger one.
>>
William Hobberwedging - Thu, 24 Nov 2016 13:17:14 EST LMSWX1C6 No.7017 Reply
The Brits use to have a shit ton of industry in the day, and I have machines that are proof of those olden days of industry. Although every time I deal with them trying to get parts for said machines, they seem to be reluctant, because that they seem to really hate having to deal with international shipping. I mean I could refer you to a shit ton of shops within the US. Look up industrial parks in your area and then check out what's there. You might find some plastic molding shops, or at least some machines shops that make you molds for you to use. Little, dank job shops are usually the most desperate for work, but even mid sized 20+ machine shops will work with you off the street. Mega shops not so much.
>>
Ian Turveyfoot - Sun, 19 Mar 2017 03:42:42 EST IZhvBj47 No.7113 Reply
Just make the boxes out of laser cut panels, either with acrylic or plywood.
That will be the most economical version if you make the CAD drawings yourself.

Arduino/rasp Pi or other

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- Sun, 25 Sep 2016 04:01:48 EST 0BrDnpk/ No.6998
File: 1474790508049.jpg -(18223B / 17.80KB, 353x277) Thumbnail displayed, click image for full size. Arduino/rasp Pi or other
hey tesla/
does anyone know how to make an interactive audio installation using Arduino or Raspberry Pi to trigger pre-recorded loops that synchronize?

would love to create but dont know how!

Should I be on another board?

Think engineers would have a field day tho!
2 posts omitted. Click View Thread to read.
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Charlotte Fullyridge - Sun, 15 Jan 2017 16:12:56 EST umzRyjso No.7039 Reply
yes i have a rasp pi and while it's a little piece of shit, I just need to get a case for it and install a touchpad.
It runs linux and will absolutely handle homebrew audio stuff, as you can absolutely add sensors like mic and audio in and there's both a 3.5 jack and an hdmi port that does audio out to the tv system.
right now I can play piano on my keyboard, mp3 & youtube.
add a midi pad and you can do digital effects with like garageband or fender fuse, something like that
I wouldn't bother with arduino

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