Re: aquarium water pump for chemicals ?
2008-10-19 by TonyB
Sorry about my confusion on the air vs water pumps. But, maybe I have something else(?) On my first spray etching tank, I used a swamp-cooler water pump.
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Re: [Homebrew_PCBs] Re: aquarium water pump for chemicals ?
2008-10-19 by lothar baier
he wasnt talking about the airpump he was talking about a water pump, the problem was with the bushings of the aquarium pump, the etching solution especially
Re: [Homebrew_PCBs] Toner Dusting your Silkscreen (an idea)
2008-10-19 by Myc Holmes
Warren, Colored toner tends to be very expensive, especially when you have to buy all 4 colors at once. SEARS has small packets of an electrostatic paint
Toner Dusting your Silkscreen (an idea)
2008-10-18 by warrenbrayshaw
To date component placement silk screens have been limited to black using toner transfer. With colour laser printers you should be able to toner transfer a
Re: aquarium water pump for chemicals ?
2008-10-18 by TonyB
Hi PBB DIYers. Thought I d comment about bubble etchers using aquarium pumps. I ve been using the same aquarium pump for over 20yrs for my little bubble
Re: [Homebrew_PCBs] aquarium water pump for chemicals ?
2008-10-18 by Adam Seychell
... What parts didn t survive in the pump that you tried ? I d suspect dishwashers use stainless steel parts in contact with liquid. Alkaline dishwashing water
Re: aquarium water pump for chemicals ?
2008-10-17 by wimmie262000
This guy (Dutch): http://www.picbasic.nl/index_etsen.htm uses a pump to blow air into the fluid. That way the tube can be fully made from plastic. So there is
Re: [Homebrew_PCBs] aquarium water pump for chemicals ?
2008-10-17 by lothar baier
tried that, didnt work, what workes is a pump like used in washers or dishwashers, they are normally fairly resistant to chemicals ... From: Adam Seychell
Re: [Homebrew_PCBs] double sided boards and through plating
2008-10-17 by lothar baier
In some sw products you can turn this off , creating plated through holes in a home lab is not a easy task. The easiest way to do so is to create a set of
Re: [Homebrew_PCBs] double sided boards and through plating
2008-10-17 by Dylan Smith
... The answer is it depends . I try to lay out my boards in such a way to not make it hard to hand assemble. I tend to use SIL strips to make up IC sockets,
Re: [Homebrew_PCBs] double sided boards and through plating
2008-10-17 by Harvey White
... So where are you drawing the restriction boxes? around all the pads? Harvey
Re: [Homebrew_PCBs] Getting a good trace.
2008-10-17 by Harvey White
... Did that myself a long while ago. Remember it well, Kodak KPR, and I also remember using an 8x10 view camera to backlight the artwork to make negatives.
Re: [Homebrew_PCBs] double sided boards and through plating
2008-10-16 by Henry Liu
I figured it out in Eagle - needed to draw boxes over all the places on the tRestrict layer (41) then it works great. My boards are so much easier now! Henry
Re: [Homebrew_PCBs] double sided boards and through plating
2008-10-16 by Harvey White
... No. Some items (IC sockets) cannot be treated that way. Some items are designed to be soldered on one side only (resistor networks). I use separate VIAS,
aquarium water pump for chemicals ?
2008-10-16 by Adam Seychell
Hi, I though I d ask this question on this group because there are lot of innovative hobbyists here that look for ways of using of the shelf items to achieve
Re: [Homebrew_PCBs] cutting homebrew pcbs and source of cheap blanks?
2008-10-16 by Henry Liu
Looks good to me. Cutting is still an issue at times. I heard a Guillotine paper cutter works very well. Anyone comment?
Getting a good trace.
2008-10-16 by Fred Huff
A kind of intro. So far this has been an interesting group. I made my first PCB about 1971 while in college. We created handmade reverse negatives, put photo
double sided boards and through plating
2008-10-16 by Henry Liu
Most pcb programs assume holes are through plated which isn t the case when I make my own double sided board. Do you guys usually solder both the top and
Re: [Homebrew_PCBs] cutting homebrew pcbs and source of cheap blanks?
2008-10-16 by michael tenore
Go on eBay there is a guy selling FR4 cheap and he will cut it for you! ... From: Henry Liu To: homebrew_pcbs
RE: [Homebrew_PCBs] cutting homebrew pcbs and source of cheap blanks?
2008-10-16 by Kurt
How many do you need and how large are the pieces that you need? I am in the SE MI area, but they are easy to ship I can trim them to size, within reason. 73
Re: [Homebrew_PCBs] cutting homebrew pcbs and source of cheap blanks?
2008-10-16 by DSNman@comcast.net
Hello all, If you have a table saw and a plywood blade that works good. I use some thin scrap plywood under the board and cut that at the same time. Any scrap
cutting homebrew pcbs and source of cheap blanks?
2008-10-16 by Henry Liu
Can someone suggest a source of cheap pcb blanks? Also, how do you cut your pcbs from a bigger piece? I can mill the outline out but it is not an easy process
Re: [Homebrew_PCBs] Re: Toner Dusting pcb process
2008-10-16 by Stefan Trethan
As far as i know nobody has shown repeatable or reliable direct laser printing. That alone would make it better in my eyes. ST ... [Non-text portions of this
Re: [Homebrew_PCBs] Re: Toner Dusting pcb process
2008-10-15 by Herbert E. Plett
why do you think this (complex) procedure might be better or more accurate than direct laser printing?
Gerber to Gcode algorithm
2008-10-15 by pauladrian.arellano
Hi. I just want to ask if there exist a open source program to generate gerber to gcode. My pcb design is complex and I hope there is a program that can
Re: [Homebrew_PCBs] Re: Toner Dusting pcb process
2008-10-15 by Myc Holmes
Marko, That s easy enough to try! You will need a paper that does not absorb the ink, perhaps an overhead transparency. Also slightly rough up the surface to
Re: Toner Dusting pcb process
2008-10-15 by Marko Pavlin
Hi! Here is one of my stupid idea. Has anyone tried to combine both methods, toner dust and toner transfer? I think the appropriate paper should be used to
Re: [Homebrew_PCBs] Re: Toner Transfer
2008-10-14 by michael tenore
I use Staples photo basic gloss! It is pretty good! Also I just tried Hammermill laser color gloss paper 32lb ($10 for 300 sheets at Staples!) this morning on
Re: Toner Dusting pcb process
2008-10-14 by warrenbrayshaw
I ve tried laying down the ink with a canon i560 onto plastic sheets to evaluate the extent of the wetness of the ink after the print and found that that is
Re: [Homebrew_PCBs] Toner Dusting pcb process
2008-10-14 by Myc Holmes
Hi Volkan, Great! I haven t tried any fine traces yet,as most of my pcbs are pretty simple with wide tracks. I was just looking for an easy method to make
Re: [Homebrew_PCBs] Toner Dusting pcb process
2008-10-14 by Volkan Sahin
Hi Myc, Last weekend, I tried toner dusting but what I ve achived is 7/7 (width/trace). What is your test results? Do you have some pictures to share?
Re: [Homebrew_PCBs] Toner Dusting pcb process
2008-10-14 by Myc Holmes
Herbert, I would think that any inkjet printer could be made work. Woody has posted on the Inkjet pcb construction group about hishis success using a Lexmark.
Re: [Homebrew_PCBs] Re: Toner Transfer
2008-10-14 by Ed Smith
Hi Brian, Thanks for the reply. My experience is that I get inconsistent transfers with hot peal. Some of the toner stays back on the paper. I also have a high
Re: [Homebrew_PCBs] Re: Toner Transfer
2008-10-14 by John Coppens
On Mon, 13 Oct 2008 22:00:40 -0000 ... Hi Brian. I hadn t read that suggestion elsewhere. When you remove the paper freshly ironed, doesn t half of the toner
Re: [Homebrew_PCBs] Toner Dusting pcb process
2008-10-14 by Herbert E. Plett
wow, worth a try... may be even possible with anything not Epson, and any cheapo toner might do!
Re: [Homebrew_PCBs] Re: Toner Dusting pcb process
2008-10-14 by Myc Holmes
Dan, I knew from Voltan s work that he was able to print a solder mask. (I was never able to correctly cure the ink) and decided to try the Toner Dusting
Re: Toner Dusting pcb process
2008-10-14 by dandumit
I like this improvement to process. Personally I have modified an epson D68 to print on pcb and I have made some tests. Unfortunately I have never baked the
Re: [Homebrew_PCBs] Toner Dusting pcb process
2008-10-14 by Myc Holmes
Herbert, On a non absorbent surface, like a CD or pcb, the ink is still wet. Epson even has a caution statement about letting the ink dry for a few hours. The
Re: [Homebrew_PCBs] Toner Dusting pcb process
2008-10-13 by Herbert E. Plett
question: isn t the ink pretty dry when you finish printing? how does the toner hold to this dry (not cured) ink?
Re: Toner Transfer
2008-10-13 by Brian
... Using a Samsung 1430 printer and HP PhotoGloss laser paper. ... get all of the paper removed from the 10 mil spaces. It is even more difficult , of course,
Re: Cutting FR4
2008-10-13 by martin_schoenegg
... Yes it is. the set is a substitute for the waste door on the side of the saw. Even without a vac there is very low pollution because the dust collects
Re: Cutting FR4
2008-10-13 by pcb.easy
... Martin, How did you attach a vacuum to your Proxxon KS 115? Is it under the saw, or is it mounted above the blade? I have been wanting to attach a vacuum
Re: [Homebrew_PCBs] Re: Cutting FR4
2008-10-13 by Steve
Not sure I follow that . . . you score the PCB with a knife and then break it over an iron wire?
Re: [Homebrew_PCBs] Re: Toner Transfer
2008-10-13 by John Coppens
On Sun, 12 Oct 2008 15:00:02 -0700 (PDT) ... Soaking more time helps. Hotter water helps, too, but time seems more important. After a (long) while, the paper s
Re: [Homebrew_PCBs] Re: Cutting FR4
2008-10-13 by Ground Grunging
I think cutting with a knife is the best way (I use the Dremel only for traces: I remove only the copper, without removing the PCB). You make one only cut
Re: Cutting FR4
2008-10-13 by martin_schoenegg
... May favorite is Proxxon Bench Circular Saw KS 115 with vacc-cleaner- Set and an Aluminum-Oxide Cut-Off Wheel NO 28 154. This works very well. Martin
Re: [Homebrew_PCBs] Toner Dusting pcb process
2008-10-13 by Myc Holmes
Len, It is a pretty simple process as is. The main problem is that working with toner powder can make quite a mess. Have you ever refilled a toner cartridge? I
Re: [Homebrew_PCBs] Toner Dusting pcb process
2008-10-13 by Lez
... Think i mentioned using (in here) the cd tray about 2 years ago when the resist ink thread started.... nice to see it catching on. Anyhow, would it work
Toner Dusting pcb process
2008-10-13 by mycroft2152
Richard Heiliger has posted on the Inkjet_PCB_Construction YAHOO group a simple conversion of the EPSON R280 inkjet printer for straight through printing on
Re: [Homebrew_PCBs] Re: making PCBs with solder resist layers
2008-10-13 by Stefan Trethan
Possibly, it could well be how they do it. But would the developer work through the tiny holes fast enough? You have like 1.5mm of soldermask there after all.