Well, you could always get a [url=http://eevblog.com/shop/index.php?main_page=product_info&cPath=2&products_id=3&zenid=c67d849bfe7c46434de195829edd2122]µCurrent[/url] from Dave (the EEVBlog guy (subscribe to him if you haven't yet))
It's a shame that my school can't offer Electronics as an A-Level option anymore - they've not got any teachers that are capable of teaching it at A-level :/
I am most disappointed.
[t]http://u.cubeupload.com/Chryseus/923Av4.jpg[/t]
My high voltage supply died with a bang and a flash, somehow 350V made its way into the low voltage area and blew practically everything, although there is surprisingly little visible damage considering it took out a 5A fuse.
[QUOTE=Chryseus;42480566]I am most disappointed.
[t]http://u.cubeupload.com/Chryseus/923Av4.jpg[/t]
My high voltage supply died with a bang and a flash, somehow 350V made its way into the low voltage area and blew practically everything, although there is surprisingly little visible damage considering it took out a 5A fuse.[/QUOTE]
To be honest, there is quite a lack of heat shrink tubing on those solder joints. I apologize nontheless.
The electronics club first day was alright, introduced everyone, started to take apart and put back together desktop computers. Decent turn out of about 30 people.
[QUOTE=garychencool;42481393]The electronics club first day was alright, introduced everyone, started to take apart and put back together desktop computers. Decent turn out of about 30 people.[/QUOTE]
What's day two?
[QUOTE=Leestons;42482272]What's day two?[/QUOTE]
Weiners
[QUOTE=Leestons;42482272]What's day two?[/QUOTE]
n-th order differential equations and Laplace transforms.
[QUOTE=Chryseus;42480566]I am most disappointed.
[t]http://u.cubeupload.com/Chryseus/923Av4.jpg[/t]
My high voltage supply died with a bang and a flash, somehow 350V made its way into the low voltage area and blew practically everything, although there is surprisingly little visible damage considering it took out a 5A fuse.[/QUOTE]
The lack of a transformer disturbs me.
[QUOTE=Van-man;42486315]The lack of a transformer disturbs me.[/QUOTE]
Yeah it's very dangerous if you don't know what you're doing, you could run it through an isolation transformer but I'm too poor to afford one.
[QUOTE=Chryseus;42487078]Yeah it's very dangerous if you don't know what you're doing, you could run it through an isolation transformer but I'm too poor to afford one.[/QUOTE]
You can find beefy power adapter and wall warts in electronic waste containers.
And they're on five-finger-discount too.
[QUOTE=Van-man;42488288]You can find beefy power adapter and wall warts in electronic waste containers.
And they're on five-finger-discount too.[/QUOTE]
They don't come in 1:1 ratio which is the whole point of the supply, sure I could use two back to back but that's rather messy and I'd need a much bigger case.
Besides it's not that difficult to work on something unisolated as long as your careful with what you're doing, I've been shocked far more by capacitors than by mains.
[QUOTE=Leestons;42482272]What's day two?[/QUOTE]
Probably more taking apart computers and then putting them together.
Later on, we teach people how to build computers from the ground up.
[QUOTE=garychencool;42491486]Probably more taking apart computers and then putting them together.
Later on, we teach people how to build computers from the ground up.[/QUOTE]
Do you have any fun stuff planned like blowing shit up ?
People love blowing shit up.
[QUOTE=Chryseus;42491783]Do you have any fun stuff planned like blowing shit up ?
People love blowing shit up.[/QUOTE]
That's the Robotics Club
[QUOTE=Chryseus;42488780]They don't come in 1:1 ratio which is the whole point of the supply, sure I could use two back to back but that's rather messy and I'd need a much bigger case.
Besides it's not that difficult to work on something unisolated as long as your careful with what you're doing, I've been shocked far more by capacitors than by mains.[/QUOTE]
What you should do, is get 2 old yellow site transformers, you can get them from £10-£20 each used in the uk,
what you do, is put the 240v inputs in parallel, and the 55-0-55 in series and DONT GROUND IT (plastic caseing, doesnt matter, grounding would short it out, dont let the cores touch, they are floating, but will be fine as they are both potted into the yellow cases you can bolt together.)
thats how ive got my 6.6KVA isolation transformer, works perfectly :)
[QUOTE=nuttyboffin;42492161]What you should do, is get 2 old yellow site transformers, you can get them from £10-£20 each used in the uk,
what you do, is put the 240v inputs in parallel, and the 55-0-55 in series and DONT GROUND IT (plastic caseing, doesnt matter, grounding would short it out, dont let the cores touch, they are floating, but will be fine as they are both potted into the yellow cases you can bolt together.)
thats how ive got my 6.6KVA isolation transformer, works perfectly :)[/QUOTE]
Yeah I might just do that, sure beats spending a massive amount on a low power isolation transformer.
[QUOTE=Chryseus;42492206]Yeah I might just do that, sure beats spending a massive amount on a low power isolation transformer.[/QUOTE]
Yeh, it works well, heres a pic of mine:
[img]http://i.imgur.com/i14fC22.jpg[/img]
EDIT:
Gratz on you 2,000th post!
[QUOTE=garychencool;42491486]Probably more taking apart computers and then putting them together.
Later on, we teach people how to build computers from the ground up.[/QUOTE]
With TTLs?
[QUOTE=nuttyboffin;42492389]Gratz on you 2,000th post![/QUOTE]
Thanks :v:
[QUOTE=Angus725;42493453]With TTLs?[/QUOTE]
No you gotta use relays.
Ok so I know this isn't EE at all, but it's electrical nonetheless.
I had to pull apart the entire fucking dashboard of a GMC Savanna to add 1 +15 wire to the radio.
Picture of the carnage (sorry for the shit quality)
[thumb]http://i.imgur.com/66fVSy0.jpg[/thumb]
[QUOTE=Nightrazr;42493539]Ok so I know this isn't EE at all, but it's electrical nonetheless.
I had to pull apart the entire fucking dashboard of a GMC Savanna to add 1 +15 wire to the radio.
Picture of the carnage (sorry for the shit quality)[/QUOTE]
Hey that looks exactly like the solder I use, Stannol right ?
[QUOTE=nuttyboffin;42492389]Yeh, it works well, heres a pic of mine:
[/QUOTE]
Can you elaborate on these 'site transformers'?
I'd love to know what they are used for so I could find a local equivalent, for a while I've been trying to justify the cost of buying one to satisfy my wants. A clean DIY option would be phenomenal.
Most of what google has found me leads to the UK and really just seems to be some sort of construction related purpose.
[QUOTE=Tw34k;42493962]Can you elaborate on these 'site transformers'?
I'd love to know what they are used for so I could find a local equivalent, for a while I've been trying to justify the cost of buying one to satisfy my wants. A clean DIY option would be phenomenal.
Most of what google has found me leads to the UK and really just seems to be some sort of construction related purpose.[/QUOTE]
They step 240V down to 110V center tapped usually 55-0-55 providing isolation for things like power tools, I presume there is a similar thing in the US.
Although it would not surprise me greatly if there is not, electrical safety and wiring standards are not exactly the best in America.
[QUOTE=Chryseus;42494075]They step 240V down to 110V center tapped usually 55-0-55 providing isolation for things like power tools, I presume there is a similar thing in the US.
Although it would not surprise me greatly if there is not, electrical safety and wiring standards are not exactly the best in America.[/QUOTE]
Yeh, over in america they dont use them as far as ive seen, they dont need it so much, 110v isnt much lethal compared to 240/230v plus, over in america, most of these transformer things are cheaper then in the uk from what ive seen.
Does someone here perhaps know a website with clear information about Thévenin and Norton theorem? I've got it at school right now and it's [B]insanely[/B] confusing, both due to it just being difficult and our teacher being terrible.
[QUOTE=scratch (nl);42503824]Does someone here perhaps know a website with clear information about Thévenin and Norton theorem? I've got it at school right now and it's [B]insanely[/B] confusing, both due to it just being difficult and our teacher being terrible.[/QUOTE]
[url]http://hyperphysics.phy-astr.gsu.edu/hbase/electric/thevenin.html[/url]
[url]http://www.allaboutcircuits.com/vol_1/chpt_10/8.html[/url]
[url]http://www.cse.salford.ac.uk/physics/gsmcdonald/E_04_Lecture04.pdf[/url]
[url]http://wisconsinso.org/divc/docs/TheveninsTheorem.pdf[/url]
[url]http://www.zen22142.zen.co.uk/Theory/thandn.htm[/url]
[url]https://courseware.ee.calpoly.edu/~jzhang/EE112/lecture11.pdf[/url]
[url]http://www.iit.edu/arc/workshops/pdfs/Thevenins_Nortons_Theorems.pdf[/url]
[url]http://www.digilentinc.com/Classroom/RealAnalog/text/Chapter_1p7p4.pdf[/url]
[url]http://ux.brookdalecc.edu/fac/engtech/andy/elec111/powerpoint/11_norton.pdf[/url]
I'll probably be able to sort it out with that wall of links, thanks :v:
Went to work on my operating system today, but spent a few hours writing up some really thorough documentation for the computer instead! It's partly for my reference use and partly for people to read if they're interested.
[URL="https://github.com/Wren6991/NorForkConditionally/tree/master/processor"]Have at it[/URL] if you're interested in how the processor works! I've done it website-style, it starts off a little dry but I've included plenty of details in the latter parts of why I made the design decisions I did.
It's bound to be full of mistakes, so if you find any then let me know please!
Does anyone still make EL tape light?
[IMG]http://i11.photobucket.com/albums/a166/ballsandy/P1010769.jpg[/IMG]
This stuff is cool as shit. It even runs directly from line-level 120v.
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