[Homebrew_PCBs] Drilling station 40V 3A power supply
2005-07-10 by Robert Hedan
Hi, I ve just uploaded a schematic of a 40V 3A circuit that I put together. I ve thrown in every security measure I could find in the DigiKey manual as an
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Re: [Homebrew_PCBs] Re: European Components for PCB's
2005-07-09 by Roy J. Tellason
... Hmm. I never thought about using that program to open postscript files, but it works... ... Probably would work, yeah. ... There are a couple of them
Re: [Homebrew_PCBs] Re: European Components for PCB's
2005-07-09 by Stefan Trethan
On Sat, 09 Jul 2005 18:45:44 +0200, Roy J. Tellason ... well, you can open it with other graphics software, sometimes ;-) maybe gimp. ... You don t need the
Re: [Homebrew_PCBs] Re: European Components for PCB's
2005-07-09 by Roy J. Tellason
... Possibly, I haven t tried it. What use would postscript be? ... I have a postscript printer, it just isn t in use at the present time.
Re: [Homebrew_PCBs] edm spark control questions
2005-07-09 by Stefan Trethan
... See the theory on the page with the eden supply. ... current is limited via a standard shunt / opamp, yes. ... certainly. ... The current is limited, no
edm spark control questions
2005-07-09 by Phil
OK, I ll start asking specific (and ignorant) questions. What are the important measurement parameter(s) of the spark? current, I d guess. others? What is the
Re: [Homebrew_PCBs] Re: EDM stuff from Electronics 101
2005-07-09 by Stefan Trethan
On Sat, 09 Jul 2005 01:05:09 +0200, Curtis Richards ... Curt, I m still most interested in the operating parameters you run the eden EDM
Re: [Homebrew_PCBs] Re: European Components for PCB's
2005-07-09 by Stefan Trethan
On Sat, 09 Jul 2005 00:51:41 +0200, Roy J. Tellason ... shouldn t ghostview be able to put out post script? If all else falis install a postscript printer and
Re: European Components for PCB's
2005-07-09 by Greg Codori
I was actually thinking of bypassing that whole portion of the schematic and just hard-wiring two wall warts into the schematic at the right voltage (15v and
Re: EDM stuff from Electronics 101
2005-07-08 by Curtis Richards
... Hi Dave, I ve been hacking around with the PCB EDM idea for a little more than a year. I initially used salvaged printer parts in the hope that I could
Re: [Homebrew_PCBs] Re: European Components for PCB's
2005-07-08 by Roy J. Tellason
... I don t use it here, though maybe I should give it a try some time. I use GhostView, under linux. Perhaps a screen capture sort of software would do the
Re: [Homebrew_PCBs] Re: European Components for PCB's
2005-07-08 by Roy J. Tellason
... And you ll find me _much_ more active in there than in here. :-)
Re: [Homebrew_PCBs] Re: European Components for PCB's
2005-07-08 by Stefan Trethan
On Sat, 09 Jul 2005 00:34:20 +0200, Roy J. Tellason ... What about using acrobat reader / select text or select image and then copy / paste? ST
Re: [Homebrew_PCBs] Re: European Components for PCB's
2005-07-08 by Roy J. Tellason
... Actually the 35v limit is only for the 5v regulator, the other one will handle up to 40v in, but then you need to consider how much power each of those
Re: [Homebrew_PCBs] Re: European Components for PCB's
2005-07-08 by Roy J. Tellason
... I wouldn t go up there unless I had to. As you go to higher collector breakdown voltage ratings you sacrifice either gain, frequency response, or both.
Re: [Homebrew_PCBs] Re: European Components for PCB's
2005-07-08 by Stefan Trethan
On Fri, 08 Jul 2005 22:21:23 +0200, Greg Codori ... There is no way to just import a pdf (which is basically a picture) into a
Re: European Components for PCB's
2005-07-08 by Greg Codori
... hook the ... also ... Thanks for the info, I ll check that group out for more technical questions. To get back on the topic of board design... In my
Re: [Homebrew_PCBs] Re: European Components for PCB's
2005-07-08 by Stefan Trethan
On Fri, 08 Jul 2005 21:46:38 +0200, Greg Codori ... Yea i have seen the schem. and you can feed it with a wall-wart. You need about
Re: European Components for PCB's
2005-07-08 by Greg Codori
... same or ... It s nice to see someone who s familiar with loconet... The BR1 (part BR1) does not feed loconet directly, it s part of the power source (it s
Re: [Homebrew_PCBs] Re: European Components for PCB's
2005-07-08 by Stefan Trethan
On Fri, 08 Jul 2005 20:27:58 +0200, Greg Codori ... That part is only going to see 5V or whatever loconet uses. What you need to look
Re: [Homebrew_PCBs] Re: European Components for PCB's
2005-07-08 by Stefan Trethan
... the ABC is usually sorted for hFE with A beeing lowest and C highest. ST
Re: European Components for PCB's
2005-07-08 by Greg Codori
I ve found quite a few NPN parts, but most of them are substituting a 400v part for a 100v part...pretty broad range for a replacement part. ... an Ic(max) ...
Re: [Homebrew_PCBs] European Components for PCB's
2005-07-08 by Roy J. Tellason
... This is why I tend to try and stick with the most generic parts possible when I m designing or building something. Going to the more specialized stuff
Re: European Components for PCB's
2005-07-08 by Phil
he did ask for a 337B but, interestingly, the 337 vs 337B specs (fairchild) appear to be identical. wonder what the difference is? I d definitely sub the 337
Re: PCB EDM -- further thoughts ( slightly OT )
2005-07-08 by javaguy11111
If you have a cheap webcam like I do, you can break the focus stop and adjust the focus in alot closer than normal. Would not recommend for expensive cameras
Re: [Homebrew_PCBs] European Components for PCB's
2005-07-08 by Dave Hylands
... I use findchips.com to find stuff. It reports several places that have BC337 in stock (including DigiKey). -- Dave Hylands Vancouver, BC, Canada
Re: RE : [Homebrew_PCBs] Newbies vs Oldies
2005-07-08 by Tony Smith
... Oh come on. Add a few gears (left over from the old HP Laserjets, we know you don t have any laminators :) ) to get the speed up. Only problem is constant
Re: RE : [Homebrew_PCBs] Newbies vs Oldies
2005-07-08 by Stefan Trethan
On Fri, 08 Jul 2005 01:24:01 +0200, Tony Smith ... Would be way too slow for unrolling paper. I don t have that much time to waste on
Re: [Homebrew_PCBs] European Components for PCB's
2005-07-08 by Stefan Trethan
On Fri, 08 Jul 2005 00:30:06 +0200, Greg Codori ... Those are standard parts, you will have no troble finding a US equiv. The BC337
Re: [Homebrew_PCBs] Newbies vs Oldies
2005-07-08 by Earl T. Hackett, Jr.
The ability of a board to withstand the stress of repair depends upon the back side treatment of the original copper foil. FirCopper foil can be made by
Re: European Components for PCB's
2005-07-08 by Phil
... wrote: ... mouser lists it for $.06 (yes, 6 cents) but doesn t stock. I d sub with a 2n2222A or 2N4401 ... mouser carries three direct cross refs for
Re: RE : [Homebrew_PCBs] Newbies vs Oldies
2005-07-07 by Phil
... dispenser is ... well, at least he uses TP. I do think there are a lot of interchanges where the distinction between fact and opinion are blurred. This
Re: RE : [Homebrew_PCBs] Newbies vs Oldies
2005-07-07 by Tony Smith
... Stefan doesn t care which way the paper hangs, so long as the dispenser is driven by a chicken grill motor. Tony
European Components for PCB's
2005-07-07 by Greg Codori
Hello everyone, I am designing a PCB following a schematic designed by someone living in Europe, and while he supplied a nice schematic and partlist, I am
Re: Re: Re: PCB EDM -- further thoughts
2005-07-07 by Bengt Sjölund
Roy, That is what I did ! Cheers Bengt [Non-text portions of this message have been removed]
Re: [Homebrew_PCBs] Re: PCB EDM -- further thoughts
2005-07-07 by Roy J. Tellason
... I just want to point out that some of us get this list as emails, rather than as accessing it on the web, and that a reference like that has no meaning
Re: PCB EDM -- further thoughts ( slightly OT )
2005-07-07 by Phil
digital zoom is worthless. ignore it completely in the specs. Look for macro mode for close up pictures. most digicams have it. You don t need a lot of
Re: [Homebrew_PCBs] Newbies vs Oldies
2005-07-07 by Roy J. Tellason
... Given that, can you give me some idea as to why it is that some boards seem to be so easy to work on (in terms of repairs etc.) where you can unsolder
Re: PCB EDM -- further thoughts
2005-07-07 by Bengt Sjölund
Hi Curt, Among others I´m interested in the EDM part mainly as the CNC machine part is well described on the web. I say like Phil in message# 9733 I ve been
Re: [Homebrew_PCBs] Re: PCB EDM -- further thoughts ( slightly OT )
2005-07-07 by Dave Hylands
Hi Curt, ... As far as I m concerned, digital zoom is pretty much a useless feature used for marketing purposes. The feature that you re looking for is
Re: [Homebrew_PCBs] Re: PCB EDM -- further thoughts ( slightly OT )
2005-07-07 by Stefan Trethan
... You would want a camera with macro mode. When i bought mine i made the mistake to first buy a very small camera with mechanic fault, assuming i can fix it.
Re: [Homebrew_PCBs] Re: PCB EDM -- further thoughts ( slightly OT )
2005-07-07 by Leon Heller
... From: curt_rxr To: Sent: Thursday, July 07, 2005 5:43 PM Subject: [Homebrew_PCBs] Re: PCB EDM --
Re: PCB EDM -- further thoughts ( slightly OT )
2005-07-07 by lcdpublishing
Hi Curt, I am guessing the photo is simply out of focus. I suspect you had the camera pretty darn close to the chip when you took the picture. Many basic
Re: PCB EDM -- further thoughts ( slightly OT )
2005-07-07 by curt_rxr
... Hi All, I tried to take a pic of my LPC2138 dip header board with my PHD ( Push Here Dummy ) film camera. It is uploaded into the Photos section in the
Re: PCB EDM -- further thoughts
2005-07-07 by lcdpublishing
Hi Curt, Thanks for taking the time to figure out what we need and are looking for. As other have mentioned, the CNC mechanicals and such are pretty easily
Re: Newbies vs Oldies
2005-07-07 by lcdpublishing
... it. But listen to the consul of the Oldies - we ve been there and generally have had more failures than successes. We don t want to dampen you
Re: Newbies vs Oldies
2005-07-07 by mycroft2152
Hi Steve, I was disappointed to see you revert to name calling. Open disagreements are healthy. I suggest you reread the Stefan s posts and note the number of
Re: RE : [Homebrew_PCBs] Newbies vs Oldies
2005-07-07 by mycroft2152
Hi Robert, Good points. Yes, and I prefer the toilet paper to unroll from over the top. I m sure Stefan,likes it to unroll from underneath. :) Seriously, let s
Re: [Homebrew_PCBs] Re: PCB EDM -- further thoughts
2005-07-07 by Stefan Trethan
On Thu, 07 Jul 2005 08:46:28 +0200, Stefan Trethan ... Also, you said you ll try carbide drills as electrodes - i wonder where to find
Re: [Homebrew_PCBs] Re: PCB EDM -- further thoughts
2005-07-07 by Stefan Trethan
... I agree. While your (Curt) ideas on CNC in general are very interesting, whatever you know on EDM is unique and much more interesting. Especially: What