/diy/ - Do It Yourself

[Anonymous No.189985]

Schematics thread. Post your favorite (or a random) schematic, write what it is and paste a link of the source(if one). go.

[Anonymous No.189987]

>>189985
FM Transmitter
http://www.aaroncake.net/circuits/fmtrans.asp

[sage No.189998]

This one, as I had to hunt for it a bit.

It's the Orange tiny Terror schematic.

[Anonymous No.189999]

Minimoog VCF.

[sage No.190000]

>>189985
There's also this one that's a Tweed Fender Bandmaster circuit with a whole bunch of extras added on. As with the OTT circuit, I've lost the source. Deep in a forum, I imagine or some random dude's earthlink site.

[Anonymous No.190001]

>>189999

Can't post it because I've already uploaded it, it's here >>189462

>>189998
Have you ever built one? I'm interested but I wouldn't know where to start.

Does anyone have any good VCO circuits by the way?

[Anonymous No.190003]

>>189985
derp. sorry about fake-saging.

[Anonymous No.190007]

>>190001
I haven't built anything, as I have kids who'll probably fuck up the process. It'll be a kids in school hobby, I think.

The transformers are usually the biggest investment of tube amp building. The Fender amp I posted will be about $250 in transformers, if you go with Mercury mags, that is. Hammond makes cheaper setups, but it's still into the hundreds.

After that, filter caps, tubes, enclosure...it adds up if you don't have a half-built project to start with.

the most important thing to know about amp building is that it can fucking KILL your ass dead. The system will carry upwards of a 600v charge, and the capacitors will carry it for a long time. If you're unlucky enough to take that up one arm and down the other, it could stop your heart. You have to really think about safety.

here's a scheme for the amp of death, Orange 120 graphic.

[Anonymous No.190015]

[Anonymous No.190017]

Harmonic Percolator

[Anonymous No.190018]

[Anonymous No.190022]

[Anonymous No.190090]

hot damn, I've always thought these threads could be better.

Here's something that will improve your designs, at a low parts cost.

[Anonymous No.190093]

How about some civil disobedience too?

[Anonymous No.190096]

How about some REAL civil disobedience?

Or... you know... community radio and stuff.

[Anonymous No.190098]

Nevermind civil disobedience, would you rather have some sweetass hifi sound at a moderate cost?

[Anonymous No.190102]

Disregard shitty stompboxes; put a couple of buffers at the I/O and some MAX1044-based PSU and have a sick ring mod.

[Anonymous No.190104]

Or if you truly want to shit up your sound...

[Anonymous No.190221]

[Anonymous No.190222]

[Anonymous No.190225]

An opto h-bridge that quit smoking.
>>>http://www.mcmanis.com/chuck/robotics/tutorial/h-bridge/bjt-circuit.html

[Anonymous No.190229]

http://www.instructables.com/id/The-Most-Useless-Machine/?ALLSTEPS

[Anonymous No.190273]

my favorite

[Anonymous No.190293]

>>190104
Nice jigawoo circuit. I made that one a while back. Nice beginner effect!

I figured I would post a classic.

[Anonymous No.190409]

>>190221

zener on the RHS is backward

[Anonymous No.190455]

[Anonymous No.190469]

The Mutron III

Gonna be one of my summer projects.
I have most everything else Musitronics too - Will dump if requested.

[Anonymous No.190470]

>>190469

What's this "0805"? Some lamp + ldr contraption?

[Anonymous No.190474]

>>190469
I'm enjoying these

[Anonymous No.190683]

Beginner here. Do you understand these schematics? Like, what does each component do, and why it's there? I'm trying to read these, but I get lost and I don't know where to start...

[Anonymous No.190684]

>>190683
it took me a long time to get through these. the electronics wiki really helps, actually.

Once you get the various symbols down, it becomes fairly easy to understand the components used. I need to learn WHY they're used instead of something else now...

[Anonymous No.190685]

>>190470
Yeah actually - Good guess...
(Someone who actually knows their shit?!...)
Was a custom little box they had made.
Here are some modern alternatives.

>>190474
Here, let me organize my Musitronics folder - Then I'll zip it and put it on mediafire.
That'll be easiest.
Check back in a few hours...

[Anonymous No.190702]

>>190685
I wish there was a good way to automate an imagedump. I have a kajillion schematics.

[Anonymous No.190776]

>>190702
>>190685
>>190474
>>190470
>>190469

Musitronics shit:
http://www.mediafire.com/?e5ehxf9vjkd8tro

Not super organized, but a little better than it was maybe...
Just some stuff I'm amassed over the years.
If you have ANYTHING that's not in this, PLEASE post it.
Don't mean to hijack this thread - Maybe I should just start a new one...

[Anonymous No.190780]

<-- How NOT to draw schematic

See here for how to do it properly: http://opencircuitdesign.com/xcircuit/goodschem/goodschem.html

"How To Draw Schematic Diagrams" By Paul Horowitz and Winfield Hill, Appendix E from The Art of Electronics 2nd Edition, Cambridge University Press 1980, 1989.

[Anonymous No.190800]

Check this nigga out!

[Anonymous No.190845]

Marshall JCM 800 Lead 50w version

[Anonymous No.190856]

>>190776
I tried loading em to my imgur, but I hit the image cap really quickly. Looking for more anon hosting solutions.

[Anonymous No.190889]

> How NOT to draw schematic

I guess you're referring to OP's circuit, in which the designer puts the battery in upside down from normal, then draws the whole circuit upside down to match. that's kinda difficult to understand.

sometimes you see circuits that flow from right-to-left, and maybe it's designed by a Jewfag or Arabfag, so it's passable, but I dont know any culture that express themselves upside-down. some people just wanna watch the world scratch their heads.

[Anonymous No.190898]

>>190889
Nope... I just think I should bring up the subject in this thread as DIYer might not be taught the basic of making a readable schematic for other people.

Even seasoned engineers make all kind of "mistakes" or bad practices that should have been taught in Drafting 101 as part of their engineering school..

Ladyada's schematic is full of what not to do.

[Anonymous No.190901]

>>190889
>but I dont know any culture that express themselves upside-down.

May be people down-under (aka Australia) making a stereotypical joke?

I started out working in defense industry. Back then it was in the transition when engineers started to be responsible for drawing schematic. The drafting people gave us a short lecture of what not do to back then. The other places I worked for free for all and the schematics are hit and miss.

[‮☜ ℼ ☞ ‭‪‮‪‫‪‮‪‪‬‬‬‬‬‬‬ !P3141593qY No.190906]

can anyone recommend me a good schematic drawing software?
I don't need simulators, only drawings.
-needs to be free at least for personal use
-needs to have european resistors

bonus if it exports vector images.

[Anonymous No.190908]

>>190684

I figured it'd be like this. I guess to be able to understand a schematic you should be experienced not only in general electronics, but also in its specific domain. After all, many of these took quite some time to design and perfect, you can't just blink at them.

>>190800

So, I'd have to use ICs for analog multipliers, wouldn't I?

[Anonymous No.190914]

>>190906
>I don't need simulators, only drawings.
Actually LTSpice is free, and very easy to use. It has symbols for some components and you can make your own. You can ignore that it is the front end for a simulator.

I use Eagle CAD for schematic capture/layout.

[‮☜ ℼ ☞ ‭‪‮‪‫‪‮‪‪‬‬‬‬‬‬‬ !P3141593qY No.190926]

>>190914
I tried LTSpice but I couldn't figure out how to export the drawing to an image.
Screenshooting the main window was not pretty.

I found ProfiCAD but maybe there are better programs I don't know about.
http://www.proficad.com/screenshots.aspx#a6

[Anonymous No.190928]

>>190926
Here is what I just tried:
Menu: Tools/Write to a .wmf - This saves it to a windows meta file.
In powerpoint, I can open the .wmf and scale it as a vector. I would assume that decent drawing packages on windows would be open that too seeing it is a standard microsoft format.

[Anonymous No.190962]

>>190906

[Anonymous No.190978]

Here is what the example schematic from LTSpice loks like after saving to .wmf. It is input to power point as a picture and rescaled. Double on it to convert.

Not sure what you are doing with a schematic only program though other than documentation.

[Anonymous No.190989]

>>190906
<- EagleCAD. There is a Free version.

Only seem to support bitmap with user settable dpi for export. You can however get it to hpgl or postscript type for plotting and convert there.

[Anonymous No.191077]

>>190908
Yeah?...
I'm kind of confused - They're specified on there...

There're the LF412s and the MPY634s.

[Anonymous No.191157]

> Actually LTSpice is free, and very easy to use.

some people love to give bad advice here. Using a circuit simulator to draw schematics is a horrible fucking idea. The main reason you wanna use a schematic capture program is because of the library, and simulators have only generic libraries. So if you need a 80C35, you can either pull it out of the library on Cadence Orcad, or spend 30 minutes creating it out of lines, boxes, and text primitives in LTspice.

> -needs to be free at least for personal use

WHY? You should always aim for the best, most expensive package: Autocad, Orcad, Adobe Master Suite. (all free on Pirate Bay, BTW). This makes you a more productive and valuable member of society. (who puts knowledge of freeware like Gimp on their resume? only hippies & losers)

[Anonymous No.191173]

schematics for the AGC (Apollo guidance computer...used to fly the first Apollo flight to the moon, one of the first computers to us ICs, primitive as they may have been). Still plan on building this one day with modern equivalents. way too many to post, so here's a mediafire link for your enjoyment http://www.mediafire.com/?ht11dclfo97birw

[Anonymous No.191193]

>>191173
Holy shit cool!
Fuck yeah!
Score!
Thanks!

>>191157
Hippie & loser here.
>not supporting freeopen ideals
People like you still exist?...

[Anonymous No.191195]

hey, first time using mediafire, so tell me if it works.

425 or so schematics of a mainly guitar and bass direction, with 400 of them being good. There's a ton of russian ones; I didn't discriminate. I have another clutch of them in another folder I need to sort too.

http://www.mediafire.com/?wqzdidy1fk6phlq

enjoy!

[Anonymous No.191205]

>>191195
pic related

Also grab >>190776 if you haven't already.

[Anonymous No.191208]

>>191205
derp
http://www.mediafire.com/?wqzdidy1fk6phlq

I got yours. I haven't compared notes, but I know there's some moog files in there somewhere...

[Anonymous No.191219]

>>191208
Cool man - Thanks.
Will patiently await set 2.

God damn.
I have so many of these now - And it's a shame, but most all just get thrown in a folder and disappear. I'm really glad I have them though (Will totally same someone's ass some day.) - I just need to go through and organize them all. One of these days...

Anyone know of a good duplicate file detector?

[Anonymous No.191231]

>>191219
md5sum

[Anonymous No.191269]

>>190962
thanks, I'll check it out.

>>190978
ProfiCAD output looks nicer.
pic related
And that's exactly why I need it: documentation.

>>190989
I don't like the look of EagleCAD. See my pic, that's what I like to have.

>>191157
I'm doing this for a school project so I can't use pirated software.

[Anonymous No.191283]

>>191173

these schematics are in fucking JPG, so typically take 600K for a single page full of gates. If they'd used GIF, it would be one-quarter the size, lossless, and without that ''dandruff'' around black lines.

You'd expect NASA, at least, to NOT be full-on retarded.

[Anonymous No.191287]

>>191283
Save one of those JPGs as a GIF and tell us how big it ends up.

[Anonymous No.191290]

>>191287
Nevermind.
I just realized this of course would be saving the lossy garbage from a jpeg and the results would be tainted.

[Anonymous No.191292]

>>191283

Why does this even matter? They're available. They're perfectly readable.
I think NASA has more important things to do than maintaining their nerd credibility by using GIFs instead of JPEGs.

[Anonymous No.191296]

> I think NASA has more important things to do than maintaining their nerd credibility by using GIFs instead of JPEGs.

incompetence at the highest levels should be worrisome. remember, these are they guys that wasted half a billion by losing a probe coz they used imperial instead of metric in one calculation.

[Your Friendly Community Libertarian No.191303]

>>191296
>standard reply about government waste

[Anonymous No.191377]

>>191157
>The main reason you wanna use a schematic capture program is because of the library

Eventually you'll have to make your own symbols. You can't rely on the CAD package having the part you want forever. I use EagleCAD at home and I constantly make my own symbols because some of the symbols even when exists are not good enough. e.g. bad spacing, implicit power pins. and lots of WTF.

We used to have people/companies at work that maintain component libraries for Cad packages.

[Anonymous No.191379]

>>191157
>You should always aim for the best, most expensive package: Autocad, Orcad,.

LOL. Those programs are toys. We don't even use them at work because they are the low tiers. We use Cadence HDL/Allegro. I don't think our mech guys ever bother with AutoCAD. They are too busy playing with 3D modeling.

At one point Cadence guys have to up their programs to handle the complexity for us. Those were the good old days in the bubble.

The most expensive program aren't necessarily the best. There is a lot of learning curve and you are only using may be 5% of the features.

[‮☜ ℼ ☞ ‭‪‮‪‫‪‮‪‪‬‬‬‬‬‬‬ !P3141593qY No.191382]

>>190962
I can't find power supplies and european resistors. I'll keep ProfiCAD.

[Anonymous No.191876]

They used to publish volumes of radio schematics for each year in the 30's, I think. Does anyone know what I'm talking about? There's a name for them and they seemed to be well known. I thought I had them bookmarked and the torrent on my computer but I don't.

[Anonymous No.191887]

>>191876

Found it

Most Often Needed Radio Diagrams. Runs from 1926 to 1969.

http://makearadio.com/beitmans/index.php

[Anonymous No.191906]

>>191283
What is your beef with jpegs? A little discrete cosine transformation never hurt anyone.

[Anonymous No.191912]

>>191379
> We use Cadence HDL/Allegro

Oh. I've used that combination, too. They were the buggiest piece of shit EDA tools I've ever had to use, particularly the library editors. They sure loved to rape the design files.

Well, that was quite a long time ago. Maybe they're less buggy now.