RE: [Homebrew_PCBs] RE: Dyeing PCBs for a vintage look
2016-11-16 by Brad
Here s a comparison shot. On the left is an original 1974-vintage Mark-8 board. On the left is the closest natural green PCB material I could find thus
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Re: SHARPIE PERMANENT MARKER ETCH TEST FOR TOUCHUP NOT PLOTTING
2016-11-16 by Dave Sage
For touch ups I would suggest, with the right ink, the technical pen would be far superior to a sharpie because you can just set the pen tip down and ink will
RE: Dyeing PCBs for a vintage look
2016-11-16 by chuck richards
Is it possible that some of those vintage green boards were epoxy glass and not phenolic? My impression of it always has been that epoxy glass is a much more
RE: [Homebrew_PCBs] Dyeing PCBs for a vintage look
2016-11-16 by Dennis Shelgren
Ghost green FR-4 is the color I recall. Hopefully the picture uploads. ... Ghost green FR-4 is the color I recall. Hopefully the picture uploads. On Nov 16,
RE: [Homebrew_PCBs] Dyeing PCBs for a vintage look
2016-11-16 by Dennis Shelgren
Back then we just went to a stationary store that made them. Nowadays I use a laser engraver to make stamps. The natural boards we dyed were just
Re: [Homebrew_PCBs] Dyeing PCBs for a vintage look
2016-11-16 by Harvey White
... Twice (or 4x) black crepe paper tape and black dots on acetate, photographed onto Kodalith film (reduction to life size) used as a master negative for
RE: [Homebrew_PCBs] Dyeing PCBs for a vintage look
2016-11-16 by Brad
I was wondering about emulating the board house markings.. that’d really help with both my TVT and Mark-8 clones. How did you go about having the stamp
RE: [Homebrew_PCBs] Dyeing PCBs for a vintage look
2016-11-16 by Brad
Thanks Dwayne. The phenolics I ve looked at online (mostly ebay) are as you say, brown. I m curious how we arrive at a green color like the originals I have.
Re: [Homebrew_PCBs] Dyeing PCBs for a vintage look
2016-11-15 by Dennis Shelgren
I had to replicate some boards in some gambling machines once. It had to look exactly like the original for legal reasons. We had to order dyable pcbs, get
Re: [Homebrew_PCBs] Dyeing PCBs for a vintage look
2016-11-15 by Dwayne Reid
Many of the old PCBs were made with phenolic PCB material. The color varies between brown to various shades of beige. You can still purchase bare (blank)
Re: GENERIC MARKER INDIA INK FABRIC PAINT ETCH TEST
2016-11-15 by AncelB
Glass paints work well , but some may require a bit of baking to thermoset.
SHARPIE PERMANENT MARKER ETCH TEST FOR TOUCHUP NOT PLOTTING
2016-11-15 by Rob
My goal here with SHARPIES is for touchup...adding anything that didn t TONER transfer properly..... not plotting. I ve gotten pretty consistent results with
Re: SHARPIE PERMANENT MARKER ETCH TEST
2016-11-15 by Dave Sage
Yes. I used them for a couple of years and even installed them in my Roland plotter to plot circuit boards. They did an excellent job (if you were lucky) and
GENERIC MARKER INDIA INK FABRIC PAINT ETCH TEST
2016-11-15 by Rob
So just for giggles........ I tested dollar store permanent markers brand ACADEMIX and here s a surprise..... BLACK ink totally disappeared BLUE ink faded away
Re: SHARPIE PERMANENT MARKER ETCH TEST
2016-11-15 by roylowenthal@...
Has anybody tried using a technical pen & one of the water resistant inks meant for drafting on film? Roy
Re: [Homebrew_PCBs] Re: SHARPIE PERMANENT MARKER ETCH TEST finer lines
2016-11-14 by Rob
I m using 50 ml muriatic acid mixed with 100 ml hydrogen peroxide...... both are 30% and 70% water. Standard hardware store $4 pool acid and drug store $3
Re: [Homebrew_PCBs] Re: SHARPIE PERMANENT MARKER ETCH TEST finer lines
2016-11-14 by Craig Martin
The staedtler lumocolor permanent pen 313 permanent (RED) 0.4 line works for me The black didn t work in ferric chloride Regards Craig VK2ZCM ... From: Rob
Re: [Homebrew_PCBs] Re: SHARPIE PERMANENT MARKER ETCH TEST finer lines
2016-11-13 by Rob
THANK YOU for the suggestion. I ll have them here in a few days. http://www.ebay.com/itm/262038010827 On 11/13/2016 03:48 AM, Dave Wade dave.g4ugm@gmail.com
RE: [Homebrew_PCBs] Re: SHARPIE PERMANENT MARKER ETCH TEST finer lines
2016-11-13 by Dave Wade
I believe that some of the Staedtler waterproof markers were reasonably etch resistant, may not be this exact one..
SHARPIE PERMANENT MARKER ETCH TEST finer lines SEARCH FOR THE RIGHT MARKER
2016-11-13 by Rob
I had 6 years of drafting. 4 in high school and 2 after high school. I have drawn houses, office buildings, hospitals, solar houses.... footings to shingles
Re: [Homebrew_PCBs] Re: SHARPIE PERMANENT MARKER ETCH TEST finer lines
2016-11-13 by Brad Thompson
... Hello, Roy and the group-- Nothing, really-- In response to Bob Roomberg s experiments with marker pens as dispensers of resist for PC-board paths, an
Re: [Homebrew_PCBs] Re: SHARPIE PERMANENT MARKER ETCH TEST finer lines
2016-11-13 by roylowenthal@...
What s wrong with erasing shields? I still occasionally use one & just showed SWMBO the benefits of an Opaline bag for a pencil sketching class she s taking on
Re: [Homebrew_PCBs] Re: SHARPIE PERMANENT MARKER ETCH TEST finer lines
2016-11-13 by Brad Thompson
... Hello-- At the risk of revealing the era in which I learned technical drawing (*), how about using an erasing shield?
Re: [Homebrew_PCBs] Re: SHARPIE PERMANENT MARKER ETCH TEST finer lines DOES IT ETCH
2016-11-12 by Rob
DOES IT ETCH does it leave enough ink on the PCB to leave copper traces after etching? Could you draw an 8 pin SMT landing pad with it?
Dyeing PCBs for a vintage look
2016-11-12 by Brad
Hey guys, I have recently heard of some methods of dyeing PCBs to achieve coloration closer to what vintage PCB stock looked like. I m wondering if any of
Re: SHARPIE PERMANENT MARKER ETCH TEST finer lines
2016-11-12 by alan00463@...
I got a package of five Sharpie Precision precision markers from Staples. Also marked Ultra Fine . The package contained two black markers. The other
Re: SHARPIE PERMANENT MARKER ETCH TEST finer lines
2016-11-12 by Rob
I was hoping to find a marker that could leave a finer line. I am getting a real fat line with a sharpie. So I was hoping a new sharpie might leave enough inck
Re: SHARPIE PERMANENT MARKER ETCH TEST
2016-11-12 by AncelB
You need to use Silver Sharpies and make sure the ink is dry.
Re: SHARPIE PERMANENT MARKER ETCH TEST
2016-11-12 by tasmod@...
Excellent test. I did something similar and was amazed at some results. I now use a black Laundry marker available here in the UK from W H Smiths a
SHARPIE PERMANENT MARKER ETCH TEST
2016-11-12 by Rob
I had been getting very mixed results with ARTLINE 70 HIGH PERFORMANCE permanent markers and SHARPIEs were drying out too fast for me so I tried other SHARPIE
Re: Heater for Etchant Bath
2016-11-10 by Kamen Lilov
... hot acid using a sponge. ... Come to think of it, I d like to share a bit more of my process. I don t do laser and ironing (although I have LaserJet 2100
flux on Dumbo's tracks--I'm a fool to do your dirty work, oh ye-ah!
2016-11-10 by alan00463@...
Recall that I had chemically plated my board with bottom tracks using something like Tinnit chemical that I had got in powder form from allelectronics.com.
Reversing art work without Orange Dry Peel Negative Film
2016-11-10 by g8kps@...
Hi all, I m normally just lurking but I thought I would share this tip. I had run out Orange Dry Peel Negative Film, the solution I found was to use
Re: [Homebrew_PCBs] Re: Heater for Etchant Bath
2016-11-10 by Russell Shaw
... There s never corrosion problems after rinsing in water. If etching or developing is done in a tray, a lab hotplate is useful too.
RE: [Homebrew_PCBs] Re: Heater for Etchant Bath
2016-11-09 by keith printy
Someone I used to know heated his fecl3 in the microwave before etching . when I worked at an electronics plane we used a single burner electric stove and
Re: [Homebrew_PCBs] Re: Heater for Etchant Bath
2016-11-09 by Atlas Henry
... On Wed, 11/9/16, Kamen Lilov kamenl@gmail.com [Homebrew_PCBs] wrote: Subject: [Homebrew_PCBs] Re: Heater for Etchant Bath
Re: Heater for Etchant Bath
2016-11-09 by alan00463@...
ic_sizzle, I have also used the etching technique to which you alluded in post 35172 and ferric chloride. I keep my cold ferric chloride solution in a
Re: Dual side PCB brd
2016-11-09 by Kevin Byrne
`Thank you Ancel, I have viewed your post and off to try out your way of alignment but with negatives done up in Eagle Free Ware & Hp Laser Jet P2015dn OEM
Re: Dual side PCB brd
2016-11-09 by AncelB
Have a look at my doublesided PCB hackaday project, complete details, with pictures and videos. I describe an SMD approach but it works for thru hole just
Re: [Homebrew_PCBs] Dual side PCB brd
2016-11-09 by Kevin Byrne
Thank` you Harvey I will look into what you said all thou I have a large supply of dual sides brd stock. The brds I am doing now are freeware eagle size 4 in
Re: Heater for Etchant Bath
2016-11-09 by Kamen Lilov
Why would you heat it so hot as to let it fume? I ve been using FeCl for years, heated to about 50C / 130F in a microwave oven. I did not care to get a heated
Re: [Homebrew_PCBs] Dual side PCB brd
2016-11-09 by Harvey White
... Go back and check some of the posts, please, there are several methods. What I do is to drill VERY accurate alignment holes. I make separate top and
Dual side PCB brd
2016-11-09 by kbyrne10@...
Does anyone know of a you-tube video that clearly does the entire process or a site that clearly describes the process for pdf downloads? What I mean is
Re: [Homebrew_PCBs] A Fast PCB Etching Strategy
2016-11-09 by Russell Shaw
... ... Unfortunately I have forgotten the innovative fellow s name Maybe the Edinburgh Etch that adds citric acid. Citric acid is available as white powder
RE: [Homebrew_PCBs] DIY Gold Fingers?
2016-11-08 by keith printy
Back many years ago I remember this happening in a tv set. The 4.5 mhz discriminator did exactly that. Replacing it solved the problem. From:
A Fast PCB Etching Strategy
2016-11-08 by ic_sizzle@...
Hi there, Newbie here. I use FeCl etchant, poured into a (genuine, high-heat) Pyrex baking dish which I heat on an single burner electric stove. Not very much
Re: Heater for Etchant Bath
2016-11-08 by ic_sizzle@...
Hi there, Newbie here. I use FeCl etchant, poured into a (genuine, high-heat) Pyrex baking dish which I heat on an single burner electric stove. Use a HF (or
Re: [Homebrew_PCBs] DIY Gold Fingers?
2016-11-06 by dgminala@...
Silver migration is nothing new; it s been known to those in the antique radio restoration business for many years in the form of thunderstorming . In ye
Re: [Homebrew_PCBs] DIY Gold Fingers?
2016-11-06 by Harvey Altstadter
The paper kinda, sorta, gets around to mentioning silver migration at the very end. The is a very important failure mechanism for silver plated traces that
RE: [Homebrew_PCBs] DIY Gold Fingers?
2016-11-06 by k5ess.nothdurft@...
I posted a file RE silver vs gold plating for contacts. I probably shouldn t take up file space for this so i will delete the file and just supply the link.