what about using a heat press?
2007-06-18 by circuitmangler
Hi, I was wondering if anyone has considered or tried using a heat press for the toner transfer method. They are usually used for transferring images onto
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Re: SMD's with heat slugs
2007-06-13 by Edward Downer
If the part has a large central heat pad you could mill out the era and press a heatsink on it from the back side of the board. Edward
Re: [Homebrew_PCBs] Re: SMD's with heat slugs
2007-06-13 by Stefan Trethan
... I doubt this would work at all with the small leadless QFN packages, or at least soldering the other pins would be damn tricky then. Possibly for larger
Re: [Homebrew_PCBs] Re: C88 lowering mod
2007-06-12 by William Nelson
I modded a C88 without hacking the frame. I made new bushings for the drive shaft which lowered it by .100 . I m trying to understand what I see in those
Re: R220 photos
2007-06-12 by James Newton
Bora, I m trying to understand what I m looking at in the nice photos you posted. Where is the height adjustment for the head? Is it the gear with the arrow in
Re: C88 lowering mod
2007-06-12 by James Newton
... the ... I m trying to understand what I see in those pictures. Are the new bushings to the far left and right of the picture with the originals in the
Re: SMD's with heat slugs
2007-06-11 by Brian
One thing you can do is drill holes and use small eyelets for via s. The only problem is the part will not sit flat on the board. ... bottom of ... up ...
Re: SMD's with heat slugs
2007-06-11 by derekhawkins
... If I followed the datasheet for the heatsinked component in the shot then there would have to be 24 vias connecting the bottom 8 sq. cm pad to the top 3
Re: SMD's with heat slugs
2007-06-11 by Dave Miller
... get ... Thanks Derek, the method you describes works great for parts where you have access to the heat tabs, unfortunately the parts I am describing have a
Re: [Homebrew_PCBs] patent: Ink jet fluid composition and ink jet printing using same
2007-06-11 by Gordon Couger
I would try starch and potassium bichromate on the board. Chromate are hexivalent. If you need to make it stick a little geletain. Keep it out of green light
Re: [Homebrew_PCBs] patent: Ink jet fluid composition and ink jet printing using same
2007-06-11 by Gordon Couger
If I remember right a clean PC board spin coated with a gelling agent and ammonium or potassium bichromate and then painted with methanol or methyl alcohol in
Re: [Homebrew_PCBs] patent: Ink jet fluid composition and ink jet printing using same
2007-06-11 by Herbert E. Plett
very very interesting... seems to be possible to just mix the mentioned fluids and works on both Epson and HP (thermal) printers. somebody has access to these
patent: Ink jet fluid composition and ink jet printing using same
2007-06-11 by GiuseppeG.
You guys might like to see this: http://www.freepatentsonline.com/5849066.html Quite close to the inkjet technique described in this forum. There is also a
Re: Pulsar's "TIA" Laminator - any good?
2007-06-09 by wayneosdias
... too ... My exp is that the H210 can handle 1/16 independantly when the heat is low and also when the heat is full power (fully warmed) w/some moderate
Re: SMD's with heat slugs
2007-06-09 by derekhawkins
... Double sided thermal tape (or thermal epoxy) and heatsink. http://www.pbase.com/eldata/image/66582088
Re: [Homebrew_PCBs] Re: Pulsar's "TIA" Laminator - any good?
2007-06-08 by DJ Delorie
One thing that worked for me (I cut out little bits of paper too) is a trick included with the old white sheets. Put the paper in a closed container, on a
Re: Pulsar's "TIA" Laminator - any good?
2007-06-08 by Jeffrey Jenkins
It looks like I ve nailed down a reasonably reliable process for making boards with the Pulsar paper after not too much trial and error. I have learned a few
Re: [Homebrew_PCBs] SMD's with heat slugs
2007-06-08 by Stefan Trethan
... I do the same as you, make a large hole and fill it with copper and solder. If done well the solid copper slug can be better than a pro PCB, but it s lotsa
SMD's with heat slugs
2007-06-08 by Dave Miller
I have a question to the other members in the group. I use alot of SMD parts, many of which have heat slugs on the bottom of the parts for thermal dissapation.
Influx of members - Welcome!
2007-06-07 by Steve
I ve seen spikes in membership due to various causes in the past. But I think the current influx is probably the most protracted, and a large percentage
Re: [Homebrew_PCBs] Re: Help w/ HeatSeal 210
2007-06-05 by Derryck Croker
... The answer to that problem is simple enough, but whether you ll be able to mod the drive mechanism to give a little more gap between the rollers to cope
Re: [Homebrew_PCBs] Re: Help w/ HeatSeal 210
2007-06-05 by Norm Carlberg
Expensive but see http://www.film-source.net/12_inch_pouch_foam_laminator_2244_prd1.html A quick goggle for Bigmouth and laminator turned up above site
Re: [Homebrew_PCBs] Re: Need HELP Direct to PCB Inkjet print resist (My Epson C79)
2007-06-05 by William Nelson
If the C79 is anything like the C88 I put the paper sensor at the very front of the printer and this reqiures no cut out in the carrier for the timing. I did
Re: [Homebrew_PCBs] c88 mod
2007-06-05 by William Nelson
Not a chance in hell Thank you very much. Too much work for probably very little gain. I will give some thought to putting dimensions on the list but not right
Re: Help w/ HeatSeal 210
2007-06-04 by wayneosdias
Ive gotten a responce from Frank of Pulsar, He states that the 1/16 board may need a little persuasion, but will pass through. He suggests we switch to the
Re: Help w/ HeatSeal 210
2007-06-04 by Jeffrey Jenkins
... wrote: ... I m having the same issue as you, only I ve been using Pulsar s paper. As you noted, Pulsar states on their website that the TIA Laminator can
c88 mod
2007-06-04 by aimoredutra
Hi! I d like to know if Mr. Willian Nelson would like to sell parts to modify a c88 epson printer. Thanx!
Re: Need HELP Direct to PCB Inkjet print resist (My Epson C79)
2007-06-04 by aimoredutra
... for the PCB with the correct ... done correctly. I modded a ... Hi Mr. Willian Nelson. I blought a C88 just to modify. Would you like to sell the mod kit
Re: [Homebrew_PCBs] ?? Storing sensitized PCB boads (Negative resist)
2007-06-04 by lists
In article , ... The general rule for most photographic material is keep it cool . Many people store film in the fridge so probably a
?? Storing sensitized PCB boads (Negative resist)
2007-06-04 by lcdpublishing
Hi guys, Yet another kink in the saga. I got all the materials for the negative photo resist. I also got the instruction booklet to help guide me and it was
Re: Help w/ HeatSeal 210
2007-06-03 by wayneosdias
OK, after powering down the laminator for a bit and letting it fully cool I thought Id try an pass an old 1/16 pcb I did. It worked w/o any probs, so I then
Help w/ HeatSeal 210
2007-06-03 by wayneosdias
I went out and bought the GBC H210 from the local Staples and am having trouble passing 1/16 thick boards as it jams every attempt and Im fearful of
Re: Stack of Nuts & Volts Mags
2007-06-01 by scratch_6057
... Ha! It must be something going around, I just unloaded a collection of OLD Hobby Electronics mags last Saturday (about 100 N&V, Pop Electronics, Servo,
Stack of Nuts & Volts Mags
2007-06-01 by TonyB
I have about 50 N&V mags in the old/large format when they were free. LOTS of articles!!! I hate to throw them away, but need to clear them out of the garage.
Re: Pulsar's "TIA" Laminator - any good?
2007-06-01 by Jeffrey Jenkins
... It s like deja vu all over again!?! I am getting exactly the same crappy results I got with the Dyn-art paper 10+ years ago... I have the light blue paper
Re: [Homebrew_PCBs] Re: hand-brake project
2007-05-30 by Mark Graybill
I also cut FR-4 with a good old-fashioned style paper cutter. I would prefer a good sheet metal shear with a foot treadle, but the paper cutter is far cheaper
Re: hand-brake project
2007-05-29 by rdheiliger
I do use a paper cutter for my FR4 boards. Buy at least a 12 inch so you have some leverage with the long handle. Even then cutting more than about 8 inches is
Re: hand-brake project
2007-05-28 by wb5kye100
... files ... Hand Brakes are intended for making bends in metal for making boxes, etc. Not for *cutting* metal. You want a metal shear for something like
Re: hand-brake project
2007-05-28 by juanabba
... oppppssssssss I am also interested could we cut the FR-4 using this hand-break????? regards juan
Re: hand-brake project
2007-05-28 by Jeffrey Jenkins
... bump I m very interested in this as well. Or an off-the-shelf product that can do the job. I ve heard of people using paper cutters but I can t imagine
Re: GE or BL[B] bulbs ? - was - Re: Photo-resist etching questions....
2007-05-28 by Len Warner
... Only if the light source is sufficiently far away that the rays may be considered parallel within the accuracy required by the application. [
GE or BL[B] bulbs ? - was - Re: Photo-resist etching questions....
2007-05-28 by Ben
... Collimation is light just coming from the direction of the source. I use MG Chemical s 600 series boards Positive type resist. They list wavelength to be
Re: [Homebrew_PCBs] Need HELP Direct to PCB Inkjet print resist (My Epson C79)
2007-05-27 by William Nelson
Did you move the paper sensor as instructed? Did you make a carrier for the PCB with the correct cutout lenght? These would probably give you a paper jam error
Re: [Homebrew_PCBs] Re: Pulsar's "TIA" Laminator - any good?
2007-05-27 by DJ Delorie
... I normally run the board through a couple of times, at various angles. Traces that run parallel to the rollers seem to get less well transferred than those
Re: Pulsar's "TIA" Laminator - any good?
2007-05-27 by Jeffrey Jenkins
... I checked out your site and what you ve done with the Pulsar stuff is very encouraging! I m working on my first mostly-SMT board but because of my past
Re: [Homebrew_PCBs] Pulsar's "TIA" Laminator - any good?
2007-05-27 by DJ Delorie
... I have the whole Pulsar kit (GBC Creative), and I can do 6.7/6.7 (four pixels on my laser printer) with a little care. 0.5mm pitch SMT parts (9.8mil
Pulsar's "TIA" Laminator - any good?
2007-05-27 by Jeffrey Jenkins
Hey all - my first post after doing lots of searches here. I m a long time electronics tinkerer (20+ years) but I haven t made too many pc boards myself in
Need HELP Direct to PCB Inkjet print resist (My Epson C79)
2007-05-26 by yy
Need HELP!(sorry my poor english,I comes from Taiwai) I use c84 method modified my C79,all done but I get paper jam error. I need use CX4200 method to modified
Re: "Microwaving" Ferric Chloride
2007-05-25 by D
... but I ... than ... Definitely! It burns like H*LL if you splash it in your eye (This is the voice of experience speaking here!)! One of the nice things
Re: GE or BL[B] bulbs ? - was - Re: Photo-resist etching questions....
2007-05-25 by Len Warner
... Evenness of illumination is not the same as collimation and yours is diffuse illumination, more or less its opposite. Regards, LenW -- From Yahoo! Groups