Re: [Homebrew_PCBs] DIY PCB with press and peel blue.
2016-06-28 by M phillis
Rod pretty much as I thought before buying press and peel blue at £19 a pack only to find the instruction don t cover what we discus. Mark On Tuesday, 28 June
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Re: [Homebrew_PCBs] Re: DIY PCB with press and peel blue.
2016-06-28 by DJ Delorie
Harvey White madyn@dragonworks.info [Homebrew_PCBs] ... Also too smooth (sanding to too-high a grit, or not scuffing) Toner won t stick to a mirror-finish
Re: [Homebrew_PCBs] Re: DIY PCB with press and peel blue.
2016-06-28 by Harvey White
... I think I ve got some press and peel somewhere. The whole idea is as follows (regardless of press & peel or Pulsar... the difference is how the toner is
RE: [Homebrew_PCBs] Re: DIY PCB with press and peel blue.
2016-06-27 by Brad
I thought the whole point of press and peel was that it was supposed to be easy? Not sounding easy! I actually bought a bunch but now am kind of wondering if
Re: [Homebrew_PCBs] Re: DIY PCB with press and peel blue.
2016-06-27 by Harvey White
... Seems to me that works if and only if there is enough waste space at the end and the beginning of the board to enable reversing after the active zone
Re: DIY PCB with press and peel blue.
2016-06-27 by mosaicmerc@...
Regarding multiple manual passes thru a laminator. Here is my solution for that. A modded multi-overlapping-pass laminator. Single or double sided boards
RE: [Homebrew_PCBs] Re: Leftover copper
2016-06-27 by Brad
Okay.. I was afraid I might gouge the board with a knife. I’ll give it a try. Here are some pics of my TVT project as it stands, including a comparison shot
Re: [Homebrew_PCBs] DIY PCB with press and peel blue.
2016-06-27 by Harvey White
... The main problem with board that I ve seen is either oils/contaminants or (perhaps) a too smooth surface. You don t want it very rough, but I generally do
Re: DIY PCB with press and peel blue.
2016-06-27 by AncelB
I see some problems with the press & peel results, under etching & over etching. This implies inconsistent adhesion. Here is my process that works fairly
Re: [Homebrew_PCBs] DIY PCB with press and peel blue.
2016-06-27 by M phillis
Thanks Harvy and Phil It has been quite frustrating as I d assumed I d payed particulate attention to cleaning the board. I ll try the wet/dry method to see if
Re: [Homebrew_PCBs] DIY PCB with press and peel blue.
2016-06-27 by Phil Quinton
Mark, I ve used press and peel for a while. I ve not done a huge number of boards, but I did get varying results. I ve not done double sided and to be honest,
Re: [Homebrew_PCBs] DIY PCB with press and peel blue.
2016-06-27 by Harvey White
... Never used it, I use Pulsar paper, which is best used with a laminator, and then is soaked off (comes off almost instantly). ... Not through the laser
Re: Leftover copper
2016-06-26 by AncelB
I keep a set of iron jewellry files on hand for trimming traces and RF stub tuning. Slicing bridged copper is simple given the different file shapes.
Re: Leftover copper
2016-06-26 by goofy_36@...
I d go with the knife too. You d probably have more control that way and be less likely to mess something up. On a side note, I d love to see your TVT
DIY PCB with press and peel blue.
2016-06-26 by mark.phillis@...
Hi all. I ve been a member for a while now subscribing some time ago when I was intending to try my hand at making my own pcb. I ve now got around to making my
Re: [Homebrew_PCBs] Leftover copper
2016-06-26 by duwaynes@...
I have used a sharp X-acto knife and scraped the copper off.if it is a small area. For a larger area cover the traces with a marker pen such as Sharpie.
Re: [Homebrew_PCBs] Leftover copper
2016-06-25 by Harvey White
... Try putting a few drops on that one little area. Monitor it. Other ways are to try burning the track off with a lot of current, but that has its own
Leftover copper
2016-06-25 by Brad
I decided to make another motherboard for my TVT. The first one involved some trial and error and it showed, esp. some of the traces where my first attempt at
Re: [Homebrew_PCBs] Re: Silkscreening
2016-06-25 by mosaicmerc@...
I don t think you can use a cold process with the foil transfer.
Re: [Homebrew_PCBs] Re: Silkscreening
2016-06-24 by mosaicmerc@...
I m sorry, it sold. Use advanced search for completed listings under improved sg504
Re: [Homebrew_PCBs] Re: Silkscreening
2016-06-23 by Bill Maxwell
That second eBay number must be incorrect Ancel? Doesn t come up. Bill
Re: [Homebrew_PCBs] Re: Silkscreening
2016-06-23 by alan00463@...
Any idea whether the white TRF foil will transfer using the cold toner transfer process? Or should I be the one to experiment? Unfortunately, I don t
Re: [Homebrew_PCBs] Re: Silkscreening
2016-06-23 by Harvey White
... Just so long as it is not conductive, so I d check the metallic foils carefully. Foils are also perhaps available in stationary stores, office supply
Re: Silkscreening
2016-06-23 by AncelB
Toner transfer to the PCB for silk screen then use ANY laser transfer craft foil (eg. Ebay # 160937797413) for ANY color silk screen. If u look at my EBAY item
RE: [Homebrew_PCBs] Silkscreening
2016-06-23 by Brad
I just looked it up.. WhiteTRF? Sounds like exactly what I wanted. Thanks Harvey! From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com]
RE: [Homebrew_PCBs] Silkscreening
2016-06-23 by Tony Fishpool
For the purposes of parts placement - etch the component info with the tracks... https://dl.dropboxusercontent.com/u/1987387/blog/nano_protoboard.jpg 72/3 Tony
Re: [Homebrew_PCBs] Silkscreening
2016-06-23 by Harvey White
... it works. toner transfer is fine. ... Pulsar has white film that does silk screen. Harvey
Silkscreening
2016-06-23 by Brad
I think we touched on this subject before, but now that I ve got some boards done I m wanting to revisit it. I would like to silkscreen the parts placement
Re: [Homebrew_PCBs] Accurate drilling, cutting?
2016-06-22 by mbushroe@...
I tried a different approach when trying to get a low quality, Harbor Freight bench drill press to work. I got a little board camera ($40 color, less for B/W)
Re: [Homebrew_PCBs] Accurate drilling, cutting?
2016-06-22 by Harvey White
... A very bright light shining through the board will help. You might also want to try a bright light on the top as well. You may try putting a mirror off
RE: [Homebrew_PCBs] Accurate drilling, cutting?
2016-06-22 by Brad
I’m having good results with my dremel – it’s just very hard to see where the bit is in relation to the pad when it’s on. If it were a convenient push
Re: [Homebrew_PCBs] Accurate drilling, cutting?
2016-06-20 by riogrande491
If you have occasion to find a used Cameron micro drill press, don’t hesitate to buy it. They are extremely precise and can run up to 30,000 RPM. I bought a
Re: [Homebrew_PCBs] Accurate drilling, cutting?
2016-06-20 by Howard Chester
Having followed previous and past posts on these topics these are my set-ups, a) cutting;- I use a cheap builders tile cutter with a diamond blade (the
Re: [Homebrew_PCBs] Etching with vinegar, peroxide and salt
2016-06-20 by Russell Shaw
... It makes excellent weed killer.
Re: [Homebrew_PCBs] Accurate drilling, cutting?
2016-06-20 by Steve B.
Checkout Proxxon, they have a mini drill press I use here at my shop. Works really well, has a basic guide on it you might be able to use (or make a template)
Re: [Homebrew_PCBs] Etching with vinegar, peroxide and salt
2016-06-20 by <n0tt1@...>
Good advice, Les...thanks! Charlie On Mon, 20 Jun 2016 14:19:03 +0100 Les Newell les.newell@fastmail.co.uk [Homebrew_PCBs]
Re: [Homebrew_PCBs] Etching with vinegar, peroxide and salt
2016-06-20 by Les Newell
Don t get it anywhere near a septic tank. Copper is really good at killing bacteria. Mixing it with cement or dry-mix concrete will neutralize the acid and tie
RE: [Homebrew_PCBs] Etching with vinegar, peroxide and salt
2016-06-20 by keith printy
I would be more concerned with the copper salts. They put copper in marine paint to prevent organisms from attaching to boats! From:
Re: [Homebrew_PCBs] Accurate drilling, cutting?
2016-06-20 by James
For cutting, the double-score and snap method is best for me. Use a carbide tipped laminate cutter ( http://i.imgur.com/o9MPI0D.jpg available at good hardware
Re: [Homebrew_PCBs] Accurate drilling, cutting?
2016-06-20 by hickspj467@...
I use the optical center punch but I also use carbide drill bits. I get them from Drill City. Look for resharpened carbide bits in lots of 10 or 25. Very good
Re: Accurate drilling, cutting?
2016-06-20 by AncelB
Well I upgraded from the model 395 Dremel (5K RPM max) to a 20K RPM adjustable Proxxon drill and it has no run out of significance. I can do 60+ gauge holes
Re: [Homebrew_PCBs] Etching with vinegar, peroxide and salt
2016-06-20 by Harvey White
... The CuCl etchant never really gets spent, you just occasionally add more HCl and bubble air through it to etch. However, you could neutralize the acid
Re: [Homebrew_PCBs] Accurate drilling, cutting?
2016-06-20 by <n0tt1@...>
I have one of those optical punches. For me, it was well worth the money to purchase that. If your buy it from Grizzly tools, it comes in a kit in a wood
Re: [Homebrew_PCBs] Accurate drilling, cutting?
2016-06-20 by Harvey Altstadter
Brad, For the pads where the holes are obliterated, us a center punch with a very, very light tap to mark the hole site. The impression will let you see where
Re: [Homebrew_PCBs] Accurate drilling, cutting?
2016-06-20 by Brad Thompson
... Hello-- You might want to evaluate an optical center punch as an aid to spotting the centers of pads that you need to drill.The device consists of a
Re: [Homebrew_PCBs] Accurate drilling, cutting?
2016-06-20 by Harvey White
... You may not be happy with this idea, but I have an upside down drill press. You might be able to reconfigure the Dremel into this configuration, but it s
Accurate drilling, cutting?
2016-06-20 by Brad
So I ve etched my boards for my TV Typewriter reproduction. I m quite happy with the result, however now comes the hard part - drilling and cutting. For
RE: [Homebrew_PCBs] Etching with vinegar, peroxide and salt
2016-06-20 by Brad
Thanks guys. I ve now etched 5 boards and am pretty happy with the results: http://s1381.photobucket.com/user/unclefalter/media/20160619_190537_zpsk5uo6
RE: [Homebrew_PCBs] Etching with vinegar, peroxide and salt
2016-06-20 by keith printy
I ve seen ferric chloride solidify of try to during etching towards the end when it gets pretty well saturated with the copper. Ferric chloride to my
Re: [Homebrew_PCBs] Etching with vinegar, peroxide and salt
2016-06-19 by Harvey White
... The standard mix is hydrochloric acid (hydrogen ions and chlorine ions), and then a lot of oxygen (H2O2, hydrogen peroxide) decomposes into water and