Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.


Messages - Jebus

Pages: 1 [2] 3 4 ... 20
16
How Do I? Beginner's Paradise. / Re: Help with first layout
« on: January 30, 2017, 08:41:39 AM »
Hey!

Got it! They had the CAM job ready for Eagle, so all I had to do was export the files and insert them to the controller program which turned them to gcode. :) Took 24 minutes to make the board and at least I think it turned out pretty darn good!



Sorry about the fingerprints..  ;D

17
How Do I? Beginner's Paradise. / Re: Help with first layout
« on: January 28, 2017, 02:58:42 AM »
Okay, I tweaked it bit more. Probably good enough now. :)



Now I need to start wondering how the CAM Processor works and what all the options do. I asked the guy who has used the CNC machine before about the files, but he just said "yeah, you need Gerber files".  ::)

18
Tech Help - Projects Page / Re: Pork Barrel - no chorus effect
« on: January 27, 2017, 01:14:56 PM »
Does LED2 need to be installed for the circuit to work?

Thats just rate indicator, shouldnt cause any issue if not installed.

19
How Do I? Beginner's Paradise. / Re: Help with first layout
« on: January 27, 2017, 07:58:09 AM »
Alright, thanks!

I'm still wondering if I should move the trace that goes between the
 legs of sustain pot. It could be easily routed under C2 and around the whole pot. What do you guys think?

20
How Do I? Beginner's Paradise. / Re: Help with first layout
« on: January 26, 2017, 02:10:58 AM »
I moved parts around at left down corner and now I think it's looking better:



btw. remember that madbeans pots are designed for boardmount, ie. on the BACK. if you have them on the component side and want to use board mounts too, you need to turn them

I was thinking I would do them boardmounted at the solder side (like any commercial PCB, the soldering would just be bit different). So are those currently the wrong way around?  ;D

21
How Do I? Beginner's Paradise. / Re: Help with first layout
« on: January 25, 2017, 01:05:29 AM »
That's true. Probably wont have any kind of solder mask. Should I swap the transistor in Eagle for ones that have more space between legs?

22
How Do I? Beginner's Paradise. / Re: Help with first layout
« on: January 24, 2017, 02:02:54 PM »
looking good! minor thing, more of a personal perfectionism actually.
you can run the R5 to R3 trace horizontally instead of diagonal.

Good idea, will do that tomorrow. Also should move R2 and R4 bit to left so I can lower Q1 and ground plane fills that "hole". :)


23
How Do I? Beginner's Paradise. / Re: Help with first layout
« on: January 24, 2017, 12:29:14 PM »
I've heard that the 90 degree thing is for REALLY REALLY high frequencies, places where straight traces act like antennae and the frequency ends up polluting something else that the trace is pointing at. But that might be BS, you know? ;)

Brian told me that some fab houses might actually have problems doing them properly as well.

Yeah, I asked couple of friends, who work lot with higher frequency electronics, and they both said it won't matter at all with audio frequencies. Well, I guess its still good habit to avoid those. :)

I updated the PCB with Felix's ideas, did you mean something like this?



Edit. updated image. :)

24
How Do I? Beginner's Paradise. / Re: Help with first layout
« on: January 24, 2017, 11:51:38 AM »
check your schematic too. it seems to me that your power section is wrong. 9V goes to D5 (protection diode??), but the other end of the diode is also connected to 9V via a resistor...

Good catch! Yeah, I thought I could do it like this:



Where +9V(T) would only mean the pad and +9V would automatically connect to other +9Vs in schematic, but that doesn't seem to be the case. Now it should be fixed.


the traces from R12 to R5/R16/CLR you can save the turn and run a straight line if you go from R12 to R5 rather than R16.

any reason for the increased leg spacing on C10? also if you move C10 directly under the right pad of D3 and align the lower pads of C9 and R13 with the lower pad of C10 you will make things easier too.
rotate Q2 90 to the right, this will also clean things up. also you can rotate R10 180 and reroute the trace that is now going from its lower pad to D1/D2

Oh yeah, good ideas all. No reason for C10, probably just picked wrong component while drawing the schematic. :) I'll post updated layout later..

25
How Do I? Beginner's Paradise. / Re: Help with first layout
« on: January 24, 2017, 08:32:30 AM »
Did some more moving around and increased the isolation bit more. This is surprisingly addictive..  ;D


26
John Roberts (one of the moderators there) was an engineer at Peavey and might actually be the guy who's responsible for the annoying PCB sandwich.

I've fixed couple of these and this is probably one of the most bizarre PCB designs I've seen. :) Works great most of the time, but when it doesn't (for example because of heat from the tubes) its goddamn annoying.

27
How Do I? Beginner's Paradise. / Re: Help with first layout
« on: January 24, 2017, 02:02:41 AM »
I tried moving parts a bit to get more space between traces and pads.

Do you mean the isolation between pads and other stuff? How do I increase that that?

Ah, it was directly at polygon properties. I tried increasing it, does this look better:


28
How Do I? Beginner's Paradise. / Re: Help with first layout
« on: January 24, 2017, 01:57:48 AM »
Thanks a lot to everyone for suggestions and information! I moved parts bit more and here's the current version:



I would make the isolation a bit more and also make sure there is more space between traces and pads to reduce the possibility of connecting things that are supposed to be connected:)

I tried moving parts a bit to get more space between traces and pads.

Do you mean the isolation between pads and other stuff? How do I increase that that?

I once had someone explain to me that circuit boards are like long lines of people standing shoulder to shoulder. Each time the 'power' gets turned on, all that happens is that the people in the lines nudge the person next to them until the end. It doesn't really matter how long the lines are, because this nudging is almost instantaneous.

So in the end, 45 degrees or 90 don't really matter, but they can make routing a little easier at times. Neither does the length of connections, because it takes a really, really long line before the electronic latency is noticeable, and there's no way you could ever fit even the largest enclosure with that much trace length.

Jacob

Thanks Jacob! Really informative post. I actually tried to look a bit for other peoples designs, but I think I was trying to look for way too specific stuff (like placements for all active components and so on). I'll try to study more of those. :)

No idea what enclosure size or restrictions you have.

It's going into 1590BB with top mounted jacks. No other restrictions.

move r5, r16 and r15 a bit to the left. you'll eliminate the 90 turn to the clr.

Thanks. I moved those around and I think its bit better now :)

If you're going to cnc, try to optimize the cuts and trace widths to make the most of your cutter diameter. In general make sure that your diameter is a little thinner than your cuts, but not too much. Otherwise, it will take more passes to cut (dia too small), or worse (dia too big), you take away material off your traces.

Alright! I'll need to check to CNC mill next Monday to see what size are the cutters. I've only ran a single test layout with it so far.

29
Build Reports / Re: Pangea / Wave Machine #2
« on: January 23, 2017, 01:12:41 PM »
Awesome! The graphics look really cool.

Not 100% on the knobs but these work for now.

They look good, but I would probably go with something more colorful.  :)



30
How Do I? Beginner's Paradise. / Help with first layout
« on: January 23, 2017, 01:01:14 PM »
Hey,

I got access to CNC PCB mill and lots of cheap material. It can do single sided PCBs (drills holes and everything). So, I just did my first layout for Big Muff with Eagle.



So, even I think it looks messy. ;D I tried to move parts around and redo connections, but that's pretty much best I could on first try. It's going in a 1590BB, so there's lots of room. I tried to put the parts bit more apart to make soldering more easy (no solder mask).

So, could someone more experienced take a look and let me know what immediate problems are there? Will the long connections (for example C2 to C4, C8 to C6 or volume pot to out) cause problems?

Lots of people seem to use 45 degree angles instead of 90 degrees. I've always thought this doesn't matter in audio frequencies (only higher). Does it?

Any other tips or advice?

Thanks!

Edit. One more question: what are those blue patches at bottom right, below volume pot and at top right corner?

Pages: 1 [2] 3 4 ... 20