From: Jim Yanik
Subject: Re: rub on smd PCB dry transfers
Date: Tue, 19 Nov 2002 16:33:22 +0000 (UTC)
Organization: Friends of Lummox
References: <3DD916EA.email@example.com> <3DDA22B7.firstname.lastname@example.org>
NNTP-Posting-Date: Tue, 19 Nov 2002 16:33:22 +0000 (UTC)
Wafer wrote in
> Jim Yanik wrote:
>> Wafer wrote in
>>>Jim Yanik wrote:
>>>>Does anyone know of a source for rub-on dry transfers for SMD PCB
>>>I think Radio Shack has them, but you should really get Autotrax from
>>>Protel. Then you just print out the board on a laser printer, iron
>>>onto the board, then etch. It will save you so much time, you'll wish
>>>you did it a long time ago. See my detailed instructions in an
>>>earlier post on sci.electronics.cad entitled "Re: Protel 98 pad
>>>madness", dated Sat, 09 Nov 2002 20:25:26 EST
>> I don't HAVE a laser printer,and don't have a iron(clothing type).I
>> bought the RS transfers,and they don't have SMD pads.I'm making 3
>> little boards smaller than a quarter.(LED drivers)
> Well, for this little project, I would suggest simply using a resist
> ink pen to draw the pads. RS used to have a good one, but they changed
> it, so it may not be so good anymore. I actually called the RS
> warehouse, and got somebody to look on the shelves for the old one.
> They had only one left, and I got it! I like the one from G.C.
> Thorsen, and it is available from Mouser and Digikey. The part number
> is 22-222, and it has a very fine tip. DON'T get the other pen, which
> is a larger type. It is no good, because it happens to be the exact
> kind used to mark clothes, and does not resist the etchant.
> As for the laser printing method, you can use an inkjet to print on
> plain paper, then use the transfer sheets in a photocopier to get the
> pattern onto the sheet. I have not tried the sheets with a
> photocopier, but it's supposed to work well if the copier is good.
> This project is too small to bother with all that though. BTW, if you
> are making an LED flasher, you might want to look into blinking LED's,
> so you don't even need any chip.
Not a LED flasher,a current-regulating boost converter,LT1932.SOT-6
footprint.I want to make PCBs that don't look handdrawn,and practice SMD
Jim Yanik,NRA member
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