Re: [Homebrew_PCBs] Re: Ideas (stupid??) for toner transfer
2005-10-20 by Tony Magon
An easier way is to warm up the copper first with a hair dryer, before putting the the paper with the toner on it , and then use the iron. Regards Tony VK2IC
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Positiv 20 in Madrid
2005-10-20 by Jose
Anybody from Spain? I need to buy Positiv 20 in Madrid. Thanks Jose
Re: Ideas (stupid??) for toner transfer
2005-10-20 by lcdpublishing
I agree completely about the two primary points - 1) Rubber or some other material that gives to compensate for board thickness variations 2) un-even heat from
Re: [Homebrew_PCBs] Re: Ideas (stupid??) for toner transfer
2005-10-20 by Stefan Trethan
On Thu, 20 Oct 2005 21:58:52 +0200, lcdpublishing ... My worry was not so much about the magnitude of pressure in general, but how to adjust if from board size
Re: Ideas (stupid??) for toner transfer
2005-10-20 by lcdpublishing
Hmm, this is a good point so it bears checking on. I currently use a clothes iron and press it by hand and use about 5 inches square of the sole plate at any
Re: [Homebrew_PCBs] Re: Different PCB materials - open for discussion...
2005-10-20 by Stefan Trethan
... You mean the more expensive sets, that would be worth repairing ;-) I only buy the cheapest ones, and all 4 i have here now, of different brands and screen
Re: [Homebrew_PCBs] Re: Ideas (stupid??) for toner transfer
2005-10-20 by Alan King
... A ton or two may be closer than you d think off hand, remember the rollers flatten out a bit and create a contact patch. Not sure extreme pressure is
Re: Different PCB materials - open for discussion...
2005-10-20 by Steve
... wrote: ... Those are ... I wish that were true of all TVs! Some brands have double sided with traces following tortuous paths across
Re: Ideas (stupid??) for toner transfer
2005-10-20 by Steve
... wrote: ... area. ... Very good point. I doubt an electric griddle could stand up to much pressure, too. Steve Greenfield
Re: drilling the holes?
2005-10-20 by bob_ledoux
... I use a cheap Harbor Freight $39 drill press. It has lots of runout. From Enco I purchased a microdrill chuck for $7.50 and 1/32 drill bits by the dozen
Re: Different PCB materials - open for discussion...
2005-10-20 by lcdpublishing
Cool, then I will continue to work with it and save my band saw blades for cutting wood! Chris ... various ... trouble. ... electrical ... produce ... for ...
Re: drilling the holes?
2005-10-20 by lcdpublishing
This has been working for me. I have a drill press - any type will do fine. I buy carbide drill bits from Harbor Freight tools - about $20.00 for a box of 50
Re: [Homebrew_PCBs] drilling the holes?
2005-10-20 by JanRwl@AOL.COM
In a message dated 10/19/2005 9:29:20 A.M. Central Daylight Time, prashantfordwivedi@yahoo.co.in writes: simple & cheap method Use a fine small drill-press,
Re: [Homebrew_PCBs] Different PCB materials - open for discussion...
2005-10-19 by Stefan Trethan
On Mon, 17 Oct 2005 00:41:30 +0200, lcdpublishing ... It is a cheaper material, yes, but it is not going to give you any trouble. FR4 is more mechanically
Re: [Homebrew_PCBs] drilling the holes?
2005-10-19 by David Griffith
... I put a 1/32 bit in my dremel with a tiny amount of bit sticking out. This effectively prevents the bit from flexing and skipping. -- David Griffith
Re: [Homebrew_PCBs] Re: Ideas (stupid??) for toner transfer
2005-10-19 by Stefan Trethan
... you will probably run into more trouble (uneven pressure and heat) than you get advantage over a laminator/fuser. The thing is, pressure, as in force per
Re: [Homebrew_PCBs] drilling the holes?
2005-10-19 by Stefan Trethan
On Wed, 19 Oct 2005 09:41:58 +0200, prashantfordwivedi ... You can use a small drill, similar to proxxon (or dremel). The better the collets and bearings the
drilling the holes?
2005-10-19 by prashantfordwivedi
hi to all group members can u suggest me any simple & cheap method for drilling my home made pcb s
Re: [Homebrew_PCBs] Re: Ideas (stupid??) for toner transfer
2005-10-18 by Tony Smith
... Tom Goottee (spelling?) did something like this a while back (check the archives). Not a simple as it sounds, he had a few hassles getting even pressure
Re: [Homebrew_PCBs] Re: Ideas (stupid??) for toner transfer
2005-10-18 by Alan King
... A good electric griddle/grill might do very well here, along with a jack and some hardware. Think of an old screw type printing press.. Might be an
Re: [Homebrew_PCBs] Re: Cheap UV laser?
2005-10-18 by Alan King
... I think he was talking past calculations for LEDs maybe, not your laser calcs.. ... But what market have you seen a useful low power UV laser used in? High
Re: [Homebrew_PCBs] Re: Cheap UV laser?
2005-10-18 by Alan King
... Heard that, off hand most generally over estimate an LED s output many times as compared to other light sources.. A 100W lightbulb is equal to about
Re: [Homebrew_PCBs] Re: Cheap UV laser?
2005-10-17 by David Griffith
... Are you saying that it takes 2.6 minutes to expose a single dot or 2.6 minutes to scan over an entire board? -- David Griffith dgriffi@cs.csubak.edu
Re: [Homebrew_PCBs] Re: Cheap UV laser?
2005-10-17 by cristian
... It was me, Stevens. Here you are the calculations: My calculation is like this: For a board of 10x16 cm=160 cm2. If all need exposured (maximum, no traces
Re: [Homebrew_PCBs] Re: Ideas (stupid??) for toner transfer
2005-10-17 by Lez
... ???
Re: [Homebrew_PCBs] Re: Cheap UV laser?
2005-10-17 by cristian
... actually 0.2mm with low divergence. This was the real reason of choosing a laser. ... I ll do. Don t know its spectral response, but I ll check. Cristian
Re: Ideas (stupid??) for toner transfer
2005-10-17 by Steve
... It would have to be live steam, so it d take more than a coffee maker element. BTW, noncontact pyrometers are about $40 to $50 at Sears. Online I ve seen
Re: Cheap UV laser?
2005-10-17 by Steve
... advantage then to ... It becomes a problem of parallax error. http://www.polyphoto.com/tutorials/LaserTag/ParallaxError01.pdf You can reduce the apparent
Re: [Homebrew_PCBs] Re: Ideas (stupid??) for toner transfer
2005-10-17 by dbarlow@bobdbob.com
... I have an approximately 5 by 7 inch stainless cooler block from an old electrophoresis cell. I was thinking it could be fed steam from a coffee maker
Re: [Homebrew_PCBs] Re: Cheap UV laser?
2005-10-17 by Robert LaBudde
... What s the power requirement to expose a photosensitive board? Remember a 5000 millicandela LED will focused down to a 0.0254 mm point.
Re: Ideas (stupid??) for toner transfer
2005-10-17 by Steve
On my copious to do list. I have a Tshirt press and I bought a used HP 6L, and a couple of laminators, and I found this little sandwich press (very flat)
Re: [Homebrew_PCBs] Ideas (stupid??) for toner transfer
2005-10-17 by microsoftwarecontrol
to me, pid controlled laminator is an unbeatable solution. ... From: mikegw20 To: Homebrew_PCBs@yahoogroups.com Sent: Monday, October 17, 2005 8:01 AM Subject:
Re: [Homebrew_PCBs] Re: Cheap UV laser?
2005-10-17 by Robert LaBudde
... You re going to have the same problem with a laser, except the beam will start out with a 1-2 mm diameter instead of a 15 degree divergence. Your problem
Re: Ideas (stupid??) for toner transfer
2005-10-17 by lcdpublishing
MIke, That isn t a bad idea at all - I have not tried it myself, but while ironing some boards this weekend, I was thinking of something very similar. The
Ideas (stupid??) for toner transfer
2005-10-17 by mikegw20
Helo all. I just had a few random thoughts about toner transfer and I wondered if anyone has tried them. I am using an iron with a good level of success as
Re: [Homebrew_PCBs] Re: Cheap UV laser?
2005-10-17 by Leon Heller
... From: cristian To: Sent: Monday, October 17, 2005 5:41 AM Subject: Re: [Homebrew_PCBs] Re:
Re: [Homebrew_PCBs] Different PCB materials - open for discussion...
2005-10-17 by JanRwl@AOL.COM
In a message dated 10/16/2005 9:19:07 P.M. Central Daylight Time, JanRwl@AOL.COM writes: . . . attempting to etc. Carbide Apparently my Spell Checker thinks
Re: [Homebrew_PCBs] Re: Cheap UV laser?
2005-10-17 by cristian
... Right, but where to find the Collimator? The 250mW UV led is 6 x 6 mm and the necessary collimated beam has to be of 0.0254mm diam. Any solution here?
Re: [Homebrew_PCBs] Re: Cheap UV laser?
2005-10-17 by cristian
... Right, but where to find the Collimator? Cristian
Re: [Homebrew_PCBs] Different PCB materials - open for discussion...
2005-10-17 by Leon Heller
... From: lcdpublishing To: Sent: Sunday, October 16, 2005 11:41 PM Subject: [Homebrew_PCBs]
Re: [Homebrew_PCBs] Different PCB materials - open for discussion...
2005-10-17 by JanRwl@AOL.COM
In a message dated 10/16/2005 5:41:58 P.M. Central Daylight Time, lcdpublishing@yahoo.com writes: So, if you all don t mind, can we discuss the merits of the
Re: [Homebrew_PCBs] Re: Cheap UV laser?
2005-10-16 by Robert LaBudde
... Why do you need a laser? A UV LED with a collimating lens should be sufficient. You don t need coherent light, and the only advantage then to a laser is
Different PCB materials - open for discussion...
2005-10-16 by lcdpublishing
Hi all, I have been making some PCBs of late (just getting rolling with some projects as I learn about electronics). The first few boards I etched were on the
Re: [Homebrew_PCBs] Re: Cheap UV laser?
2005-10-15 by cristian
... Using my CNC drill/mill machine. Also used for drilling.
Re: [Homebrew_PCBs] Re: Cheap UV laser?
2005-10-15 by Adam Seychell
... Assuming you have a suitable UV laser at your disposal, how do you plan on directing its beam as accurately controlled pattern on the surface of the pre
Re: Cheap UV laser?
2005-10-15 by mikezcnc
IR is not nitrogen. Mike
Re: [Homebrew_PCBs] Re: Cheap UV laser?
2005-10-15 by cristian
... I m looking for an UV laser to expose the presensitized PCB. IR laser is powerful enough for cutting/drilling but not for my project. Cristiam
Re: Cheap UV laser?
2005-10-14 by mikezcnc
nitrogen laser is only good as a source of koherent light for experiments that require it. Otherwise- useless for drilling and cutting. Mike
EDM guru
2005-10-14 by cristian
News? The schematic? Cristian
Re: GBC Laminator
2005-10-11 by bob_ledoux
The inexpensive version is the unit sold by Pulsar.gs for their systems. They work well with .8mm thick boards. My experience is that multiple passes