Re: Need advice for large PCB and sub-mini SMDs
2013-04-27 by timgmorris@att.net
I have used contact-brand standard shelf liner from kmart ($5 for 12 x24 roll) with good results (8 mil traces). I left comments about the process in the
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Re: Need advice for large PCB and sub-mini SMDs
2013-04-21 by ve7su
David, The trouble with that is that the paper backing on the vinyl is very thick compared with the vinyl itself. This could lead to problems when passing
Re: Need advice for large PCB and sub-mini SMDs
2013-04-21 by D
Hi, ... I bought them in bulk. 5962-0400 HP INK JET CLEAR REM TOP STRIPE Transfer pictures here:
Re: Need advice for large PCB and sub-mini SMDs
2013-04-20 by tda7000
Which transparencies are those? (Do you have the HP product number?) I would never dream of trying inkjet transparencies as I would expect them to completely
Re: Need advice for large PCB and sub-mini SMDs
2013-04-20 by David
Jim, Thanks for that, wasn t thinking the matter through, I should have recalled when I used the press n peel for smaller pcb s I used to print out on A4
Re: Need advice for large PCB and sub-mini SMDs
2013-04-19 by ve7su
David, Yes, you can do that but when u have a board that s much smaller than 8.5 by 11 (the size u would have to cut the vinyl for the laser printer), it s a
Re: Need advice for large PCB and sub-mini SMDs
2013-04-19 by David
Jim, Sorry to butt in on this, but why not feed the vinyl through the printer with its original backing, then there is no risk of wrinkling, or am i missing
Re: Need advice for large PCB and sub-mini SMDs
2013-04-19 by D
... I get 100% toner transfer using HP inkjet transparencies. An added advantage for transparencies is that you can observe toner melting if you use the iron
Re: Need advice for large PCB and sub-mini SMDs
2013-04-18 by ve7su
A tip when applying the Oracal 651 vinyl sticker to the paper.. especially with the large board you are dealing with... You will need to be careful you don t
Re: Need advice for large PCB and sub-mini SMDs
2013-04-17 by wcasse
thanks missouri_ham and ve7su. ink jet paper specific paper is difficult to find in any size other than 8.5x11 - my board is 11.8 inches. i will order a sheet
Re: Need advice for large PCB and sub-mini SMDs
2013-04-15 by william casselberry
sorry about the link, - not secure http://geekhack.org/index.php?topic=40111 the surface mount components are diode arrays - 1.5mm square with 7 pads.
Re: Need advice for large PCB and sub-mini SMDs
2013-04-15 by ve7su
Yes, the root of the problem is the paper you are using. I have just recently found the best medium for toner transfer. It is Oracal 651 which is a vinyl
Re: [Homebrew_PCBs] Need advice for large PCB and sub-mini SMDs
2013-04-15 by n0tt1@...
I think the root of the problem is the paper you are using. The best paper I ve used so far for laser transfer is regular ink jet paper. I.e., not heavy
Re: [Homebrew_PCBs] Need advice for large PCB and sub-mini SMDs
2013-04-15 by Dave Wade
... my ... mount components but ... the ... I can t see the geekhack page, but if they are small smd devices with few pins I would make carriers to allow them
Need advice for large PCB and sub-mini SMDs
2013-04-15 by william casselberry
I’m a relative noob trying to prototype a computer keyboard project where my PCBs are about 12”x6”. They are single sided and have only 14 surface mount
Re: Via Rivets To Fit 0.8mm Hole
2013-04-14 by Jim
Transfer punches have a tip shaped like you describe.
Re: Via Rivets To Fit 0.8mm Hole
2013-04-13 by g3oou@...
Hi All I use a slightly larger eyelet - Tucker L762 - to make through hole connections that have sufficient clearance in the centre hole for a component lead.
RE: [Homebrew_PCBs] Re: Via Rivets To Fit 0.8mm Hole
2013-04-13 by Boman33
You might try a broken carbide PCB drillbit. It has a built-in flair. You should also be able to solder directly without pre-tinning and pre-fluxing the
Re: [Homebrew_PCBs] Re: Via Rivets To Fit 0.8mm Hole
2013-04-13 by James
... I did some testing with peening the rivets tonight, I got the best results by inserting from the presentation side, then using a very sharp fine point
Re: [Homebrew_PCBs] Re: any chance stick dry film to pcb w/o laminator ?
2013-04-11 by Hari Hendaryanto
hi todd, actually, it s a local company ( i live in indonesia). http://www.tokoprapatan.com/v1/, their location near my office. it costs me about $1/sheet. the
Re: [Homebrew_PCBs] Re: any chance stick dry film to pcb w/o laminator ?
2013-04-10 by Todd F. Carney / K7TFC
Hari, Could you share with us the name of the company that makes your transparencies? 73, Todd ... K7TFC / Medford, Oregon, USA / CN82ni / UTC-8 ... QRP (CW &
Re: [Homebrew_PCBs] Re: any chance stick dry film to pcb w/o laminator ?
2013-04-10 by Hari Hendaryanto
i m using old hp laser printer, i think it ran out of toner. i ve found printing company that will accept printing transparencies in small quantities, one or
Re: Soldermask UV ink/paint/epoxy
2013-04-09 by ve7su
Well, I had some shipped to me here in Canada without problems. So don t see why the US would be any different. Here s the link
Re: [Homebrew_PCBs] Re: Seno 100 photo resist applicator
2013-04-09 by Todd F. Carney / K7TFC
... That s strange, huh? I just sent them an email asking about this. I indicated the links I posted went to over 6,000 group members. I also ventured to guess
Re: Soldermask UV ink/paint/epoxy
2013-04-09 by Ben L
... Well the 100g Green indicated it would not ship to US. But looking at some of the other # they would ship to the US.
Re: [Homebrew_PCBs] Re: Soldermask UV ink/paint/epoxy
2013-04-09 by James
... The first one doesn t, but the others do, eg 180917174704 There are plenty of sellers on ebay
Re: Soldermask UV ink/paint/epoxy
2013-04-09 by Ben L
Looked at Ebay, it says that they can not ship to the US. Ben
Re: [Homebrew_PCBs] Re: Via Rivets To Fit 0.8mm Hole
2013-04-09 by James
... No idea as yet :) I may just try using my drill press with a slightly pointed punch in it. [Non-text portions of this message have been removed]
RE: [Homebrew_PCBs] Re: Via Rivets To Fit 0.8mm Hole
2013-04-09 by Boman33
Look for (google) automatic center punch . It is a center punch that looks like an overgrown ballpoint pen. You just push on it and it will snap. The force
Re: removing solder resist from pcb boards
2013-04-09 by Ben L
Have you tried Acetone? Ben
RE: [Homebrew_PCBs] Vetco photo resist
2013-04-09 by Rick Sparber
Donald, Vetco just told me that they would give me a full refund. It really is too bad since I had great plans for their chemicals. Rick ... From:
Re: Seno 100 photo resist applicator
2013-04-09 by Ben L
... Be nice if they had pricing information. Anyone know what their prices are like? Ben
Re: [Homebrew_PCBs] Vetco photo resist
2013-04-09 by Donald H Locker
It was MANY years ago; I remember very little except that it worked. I think it changed colour a bit after exposure, but I m colour blind and have no idea
Re: Via Rivets To Fit 0.8mm Hole
2013-04-09 by David Halbakken
James, what tool are you using to peen the rivets? I did not notice any tools specifically for that purpose on the taobao site.
Re: [Homebrew_PCBs] Re: Via Rivets To Fit 0.8mm Hole
2013-04-08 by James
... These are the ones which were 0.8mm external diameter http://item.taobao.com/item.htm?id=3910579161&spm=2014.12328642.0.0 ( all items that this seller has:
RE: [Homebrew_PCBs] Re: Seno 100 photo resist applicator
2013-04-08 by Boman33
Interesting! Thanks Laurence. Bertho From: Laurence Hand Sent: Monday, April 08, 2013 01:16 It bugged me so I researched it and found that the evaporation
Re: Via Rivets To Fit 0.8mm Hole
2013-04-08 by Stefano Cillo_cillino25@yahoo.it
Hi, could you please give the link for the rivets you mean? I searched for them in Taobao but it wasn t so easy to navigate. Thanks
Re: any chance stick dry film to pcb w/o laminator ?
2013-04-08 by tda7000
If your printout is not dark enough, you can try darkening with a black whiteboard marker. (more info in the group posts) I ve used that trick with good
RE: [Homebrew_PCBs] Re: any chance stick dry film to pcb w/o laminator ?
2013-04-08 by Boman33
Great progress! Always leave a small piece of aluminum foil in the excess margin if possible to get a reference of guaranteed no exposure. I used to have a
Re: Via Rivets To Fit 0.8mm Hole
2013-04-08 by David Halbakken
Maybe I missed it, but can you give a URL (again?) to the Taobao seller?
Re: [Homebrew_PCBs] Re: Via Rivets To Fit 0.8mm Hole
2013-04-08 by James
Just an update on this, I receieved the second batch of rivets I ordered from a Taobao seller, and surprisingly they fit my 0.8mm holes perfectly. The price,
RE: [Homebrew_PCBs] Re: Seno 100 photo resist applicator
2013-04-08 by Laurence Hand
It bugged me so I researched it and found that the evaporation of the solvent as it spreads across the board thickens the resist just enough to match the
Re: [Homebrew_PCBs] Re: Seno 100 photo resist applicator
2013-04-08 by Roland Harriston
Todd: Thanks for the Kepro update information. Roland F. Harriston, P.D. ... [Non-text portions of this message have been removed]
Re: [Homebrew_PCBs] Re: any chance stick dry film to pcb w/o laminator ?
2013-04-08 by Hari Hendaryanto
hey guys, i finally can get my clumsy old hand doing phoresist thing :)) ( from laminate until etching). not perfect, but it s the best pcb i ve ever had,
Vetco photo resist
2013-04-08 by Rick Sparber
I have had no luck with the negative type photo resist liquid from Vetco Electronics. Has anyone had experience with it? The stuff is almost clear out of the
Re: [Homebrew_PCBs] Re: Seno 100 photo resist applicator
2013-04-08 by Missouri Guy
Roland & Todd, That s interesting info. Also good detective work Todd! Thanks for the links! Charlie Missouri Guy On Sun, 7 Apr 2013 18:11:49 -0700 Todd F.
Re: [Homebrew_PCBs] Re: Seno 100 photo resist applicator
2013-04-08 by Todd F. Carney / K7TFC
On Sun, Apr 7, 2013 at 4:56 PM, Roland Harriston ... Kepro as company is gone, but at least some of its product line was taken taken over
Re: [Homebrew_PCBs] Re: Seno 100 photo resist applicator
2013-04-07 by Roland Harriston
M. Guy: If you can go back and find some information on the Kepro company, you might be able to see some photos of the dip-coat tank that they sold many years
Re: [Homebrew_PCBs] Re: Seno 100 photo resist applicator
2013-04-07 by Missouri Guy
... The size of the panel is only limited by the capacity of the dip tank. Usually, the pro machines have a controlled withdrawal mechanism which assures
Re: Seno 100 photo resist applicator
2013-04-07 by designer_craig
I alos found that it helps to first wet the entire board with the resist a brush or finger then pour more resist in the center and start it spinning. My