Re: wanna start etching the best way, but dont know how.....
2003-07-21 by mfcowli
... Mega have a few pictures in their explanation, at: http://www.megauk.com/producing_a_pcb.php Mike Cowlishaw
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Re: Poor Man's Drill Press - wobble
2003-07-21 by Dave Mucha
... If you check, the spindle is loose in the frame. HF is terrible as far as fit goes. Also the bearings are sloppy so even if you fix the loose spindle,
wanna start etching the best way, but dont know how.....
2003-07-20 by mumin55555
hallo everybody! im making a lot of pcb s, but the old way (photo paper, ironing...). i want to start etch using photo resist and everything, only i dont know
Re: [Homebrew_PCBs] PCBoard trace width
2003-07-20 by Stefan Trethan
track between ic pins (standard dil) is absolutely NO problem. you can even do this with plotting resist on. i think with photo process it would be well
Re: Poor Man's Drill Press
2003-07-20 by starsnstripes_2003
Stefan, Thanks for the ideas on H2O2. My solution is still light green after 1 time use. I only saw some light bubbling after mixing, and soon there were no
Re: PCBoard trace width
2003-07-20 by ghidera2000
I don t have any problem routing between IC pins. Usually use 8 mil traces and I use rectangular pads 70 mil across the IC and 40 mil along it - gives extra
Poor Man's Drill Press
2003-07-20 by Nedtron
Greetings, As a make shift arrangement, how about placing a shank in the chuck of the Harbor Freight drill press and mounting the Dremel to the shank thus
Re: [Homebrew_PCBs] Poor Man's Drill Press
2003-07-20 by John Greene
Hi Byron, It sounds like you are having a lot of fun! I have used the sun to expose the photo resist on my boards for years ( since 1969 actually ) and I
Re: [Homebrew_PCBs] PCBoard trace width
2003-07-20 by Leon Heller
... I can manage 10/10 design rules, using a LaserJet IIIp. No problems putting a track between IC pins. Leon -- Leon Heller, G1HSM Tel: +44 1424 423947
PCBoard trace width
2003-07-20 by Larry
Hi folks. I was just looking at some of the boards in the photo/files area and i must say thats very good work. None of my homebrewed boards came out as good
Re: [Homebrew_PCBs] Poor Man's Drill Press
2003-07-20 by Stefan Trethan
i also use hcl and h2o2. the h2o2 is too cheap to bother with heating etc. but be aware that strong bubbling is a sign of too much h2o2, then it is too fast
Re: [Homebrew_PCBs] Poor Man's Drill Press
2003-07-20 by Leon Heller
... [deleted] Congratulations! ... I use about 10 g/litre. No brushing needed. It depends on the resist material. ... Yes, the H2O2 gets converted to H2O and
Re: [Homebrew_PCBs] Poor Man's Drill Press
2003-07-20 by Jan Kok
See my laptop drill press in the photos section, and message 2057 in this group which describes it. ... I did exactly that, and it works, sort of, but there
Poor Man's Drill Press
2003-07-20 by starsnstripes_2003
Greetings! Thanks to all you guys posting the valuable info! I just wandered in here a few days ago, and was looking for some helpful hints on starting out
Re: [Homebrew_PCBs] Re: HP PLotter (again)
2003-07-19 by Stefan Trethan
... but maybe then it is much easier to use one of the free designs on the web, which use steppers. some use very simple stepper controller circuits on lpt. if
Re: [Homebrew_PCBs] Re: HP PLotter (again)
2003-07-19 by Brian Pitt
if it is anything like the one I tore into the encoders may surprise you on that one they were an odd type with raised spiral magnetic arms spinning over
Re: HP PLotter (again)
2003-07-19 by Dave Mucha
... Too compex ... wise, one of my ... If it has encoders then it is pretty valuable. at least to me. it would be a great start for a pcb driller. encoders
Re: [Homebrew_PCBs] HP PLotter (again)
2003-07-19 by JanRwl@AOL.COM
In a message dated 7/18/2003 9:49:58 AM Central Standard Time, ... That plotter has servos with encoders! Whiz-bang thang, it is! Too compex for ignoramouses
Re: HP PLotter (again)
2003-07-19 by Dave Mucha
... same ... you ... on ... for ... it ... Surplus! ... rebuild ... scratch. ... Darn, I guess I may pull one apart for parts and see what the others bring on
Re: HP PLotter (again)
2003-07-18 by Steve
GPIB interface cards are -very- expensive, $300 ISA and $400 PCI, same price new or used. However, a GPIB plotter may fetch a good price on eBay, as long as
Re: HP PLotter (again)
2003-07-18 by gmanca101
I used to use an hp 7475A plotter for pcbs and I found it difficult to get good results. It is very hard to plot double sided pcbs. Even if you get that to
Re: [Homebrew_PCBs] HP PLotter (again)
2003-07-18 by Stefan Trethan
have similar. steppers not too much interesting i think. mine has rs232. gpib may be hart to interface, no idea what io cards cost. did not try drilling.
HP PLotter (again)
2003-07-18 by Dave Mucha
Hi all, I am lucky enough to have gotten a few HP plotters. these are the ones with the multi pen carosel. I need to check each to see if they are all the
Re: [Homebrew_PCBs] flex circuits by hand?
2003-07-18 by Ron Amundson
... From: Stefan Trethan To: Sent: Thursday, July 17, 2003 4:33 AM Subject: Re: [Homebrew_PCBs] flex
Re: [Homebrew_PCBs] Convert Eagle to Protel (was Re: Convert Protel to Eagle?)
2003-07-17 by Leon Heller
... The Pulsonix software I use can read Protel, PADs, CADStar etc files. They are working on Eagle file import. Leon -- Leon Heller, G1HSM Tel: +44 1424
Re: [Homebrew_PCBs] flex circuits by hand?
2003-07-17 by Stefan Trethan
thanks for that info about the purposes. i still do not like this flexible stuff. not for soldering components on it. as cable it is ok. but thats only my
Convert Eagle to Protel (was Re: Convert Protel to Eagle?)
2003-07-17 by Mark Farnell
Conversely, is there any way to convert Eagle schematic and board files to Protel and other popular formats? If not, which software can view Eagle files? Mark
Re: flex circuits by hnad?
2003-07-17 by rolanyang
That is very interesting. Running a sheet of copper through a laser printer is not likely to work because a copier/laser printer operates by electrostatically
Re: [Homebrew_PCBs] flex circuits by hnad?
2003-07-17 by Brian Pitt
I tried a crude test that didn t work out too well so I can tell ya one way that wont do it :) I used slug tape its an adhesive backed copper foil the
Re: [Homebrew_PCBs] flex circuits by hand?
2003-07-16 by Ron Amundson
... From: Stefan Trethan To: Sent: Wednesday, July 16, 2003 3:02 PM Subject: Re: [Homebrew_PCBs] flex
Convert Protel to Eagle?
2003-07-16 by gmanca101
I dont know if this is possible but can Protel PCB files be converted to Eagle Projects? Thanks, Genaro M.
Re: [Homebrew_PCBs] flex circuits by hand?
2003-07-16 by Stefan Trethan
never did. never thought of. i wonder what use you might have for this? i think it would be damn hard to get components on it so they don t peel off the copper
Re: [Homebrew_PCBs] flex circuits by hnad?
2003-07-16 by Ron Amundson
Has anyone ever tried to homebrew a flex circuit. It would seem to be a similiar process except for finding copper coated kapton film. I wonder if one could
developing double-sided PCBs
2003-07-16 by Mark Farnell
I have an idea for developing double sided PCBs: One of the sides are exposed first, then the exposed side is immediately sprayed with sodium carbonate
Re: [Homebrew_PCBs] Re: Help with etching - accuracy
2003-07-15 by Ron Amundson
12 years ago I tested a HP IIIp, and found 0.005 skew error across a 7X10 test pattern done on an 8.5 X 11 transparency. I also tested a 4, and 5 laser jet
Re: Help with etching - accuracy
2003-07-15 by Dave Mucha
Interesting idea. but what is the overall accuracy ? it would seem that a PCB could be off more than just a few thou over the lenght of a 10 inch board and
Help with etching
2003-07-14 by TT Scale Model Railroads
I need to have a few 8x10 inch pcbs etched. These are not for electronic applications but a calibration test tool. They will have a rectangle out lined with
Tip for those making phototransparencies: cleaning out inkjet printheads
2003-07-14 by Steve Greenfield
For Stefan, maybe you can clean out that printer using this tip. Or for anyone else using an inkjet to make transparencies, plagued by clogged heads. I just
Re: New file uploaded to Homebrew_PCBs
2003-07-12 by Steve
That is because I deleted them. I think he should upload them to Electronics_101 and ask there. No offense, just off topic. Steve ... attempts
Re: Drilling machine idea HF drill press
2003-07-12 by Dave Mucha
... drill chuck? I m thinking it self aligns to the flange bearing so you don t, but not sure. I will need to build one of these. ... The nice thing is that if
Re: [Homebrew_PCBs] New file uploaded to Homebrew_PCBs
2003-07-12 by JanRwl@AOL.COM
Mark: I continue to get THIS message whenever I try any of your repeated attempts ... Jan Rowland [Non-text portions of this message have been removed]
Re: [Homebrew_PCBs] New file uploaded to Homebrew_PCBs
2003-07-12 by JanRwl@AOL.COM
Mark: It STILL doesn t show . [Non-text portions of this message have been removed]
Re: [Homebrew_PCBs] Re: Drilling machine idea HF drill press
2003-07-12 by Ron Amundson
Ahaa, great idea. Do you get any vibration from the loose tolerance drill chuck? I m thinking it self aligns to the flange bearing so you don t, but not sure.
Re: New file uploaded to Homebrew_PCBs
2003-07-12 by Steve
... I try to be a moderate owner. Steve
Re: New file uploaded to Homebrew_PCBs
2003-07-12 by Steve
It is gone. Sorry, I m quick on the draw cause I m set to Digest mode, so I don t see anything until a day has passed, usually. I admin a dozen lists and am
Re: [Homebrew_PCBs] Drilling machine quill
2003-07-12 by JanRwl@AOL.COM
I am a bingo-card junkie, and I just got my reply from NSK America for their air- and electronic quill-motors (even dental hand-pieces). They make air-motors
Re: Drilling machine idea HF drill press
2003-07-11 by Dave Mucha
... not quite following the process, and a picture might help. I did a google search, and can t seem to envision how such an adaptor works, as all I found were
Re: [Homebrew_PCBs] Drilling machine idea HF drill press
2003-07-11 by Stefan Trethan
sonds much like the HF press is only a heavy stand then? if you have to add the bearing shafts etc... i think you could attach a lever for operating it and
Re: [Homebrew_PCBs] Drilling machine idea HF drill press
2003-07-11 by Ron Amundson
Do you have a link to a drawing? This sounds very interesting. I m not quite following the process, and a picture might help. I did a google search, and can t
Re: [Homebrew_PCBs] Re: New file uploaded to Homebrew_PCBs
2003-07-11 by Stefan Trethan
come on steve... did you delete the scematic or isn t it working because of some other reason? i really wanted to see this train thingy.... but you are right,