Re: [Homebrew_PCBs] screen emulsion and photoresist
2012-05-19 by Larry Battraw
... That may have been me. I have tried it and the results were not encouraging or usable. I used a premixed diazo-type emulsion and coated a few boards with
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[Homebrew_PCBs] screen emulsion and photoresist
2012-05-19 by Jeff Heiss
Someone mentioned recently they were going to perform experiments using screen printing emulsion as photoresist. Are there any updates on the discussion? Are
Re: [Homebrew_PCBs] Why use Riston or some other negative photoresist dry film?
2012-05-18 by Bill Maxwell
Understood Robin, although I have not encountered problems with the Kinsten positive pcb in terms of registration or under-cutting etc. I must check my Riston
Re: [Homebrew_PCBs] Why use Riston or some other negative photoresist dry film?
2012-05-18 by Robin Whittle
Hi Bertho, Thanks for the link to your test charts. I will use these when I have the Riston film in a few weeks time. At present I only have a small piece of
RE: Why use Riston or some other negative photoresist dry film?
2012-05-18 by Boman33
Hi Robin, I 100% agree with you about the limited performance of toner transfer. My question is: why exclude positive resist options? Years ago I used to make
Cheap Lowell LOOL280 laminator for Riston or other negative film photoresists
2012-05-18 by Robin Whittle
Short version: With a little rewiring, this 150C $20 laminator * looks like it will be good for ~115C lamination of * Riston negative
Why use Riston or some other negative photoresist dry film?
2012-05-18 by Robin Whittle
Hi Boman33, Don and Bill, I am responding to your replies to my message Riston precoated FR4 in Australia, Riston sheets and rolls . I am pursuing Riston, or
Re: [Homebrew_PCBs] Re: Slow Etch?
2012-05-18 by Donald H Locker
The H2O2 I purchased at Sally Beauty Supply was Salon Care Professional 30 Volume Clear Developer. The staff were very curious about how it worked for making
Re: [Homebrew_PCBs] Riston precoated FR4 in Australia, Riston sheets and rolls
2012-05-18 by Bill Maxwell
I went down a similar track a few years ago Robin, as I had a stock of Riston pre-coated board inherited from a closed major electronics workshop. The problem
Re: [Homebrew_PCBs] Riston precoated FR4 in Australia, Riston sheets and rolls
2012-05-18 by VK3YV
Hi Robin, I use Kinsten precoated board from Kalex and find it excellent, the difference being it is positive acting resist!. Look in the Kalex catalogue for
Re: Drills and stands
2012-05-17 by tda7000
I have the FBS-240E tool. Never used the 12v one so can t comment on those. The fence on the base can be moved and even removed. If you need even more space,
RE: [Homebrew_PCBs] Riston precoated FR4 in Australia, Riston sheets and rolls
2012-05-17 by Boman33
Thanks for a detailed post with good information. A quick question: Why not also consider positive resist? ============================= From: Robin Whittle
Riston precoated FR4 in Australia, Riston sheets and rolls
2012-05-17 by Robin Whittle
I am a newbie to this list and am keen to set up for using Riston (negative) photoresist for making small quantities of relatively small PCBs. I used it in
Re: Drills and stands
2012-05-17 by Howard
tda7000 Are you using the FBS-240E or the 12v version in the MB140/S ?, am thinking of getting the FBS-240E Also i note that the stand has a fence across the
Re: [Homebrew_PCBs] Drills and stands
2012-05-16 by KPL
http://dl.dropbox.com/u/45620469/pcb/img_1356.jpg http://dl.dropbox.com/u/45620469/pcb/img_1357.jpg http://dl.dropbox.com/u/45620469/pcb/img_1359.jpg
Re: Drills and stands
2012-05-15 by tda7000
I use the Proxxon FBS rotary tool (You can also get the IB/E which is even better) in the MB 140/S Stand, after watching this:
Re: my old HP laser jet died
2012-05-15 by Dave Sage
I would agree. Nothing like the old HP printers. I have an old HP LJ3 (which I think is older than the LJ4 by a bit). If the printer is throwing an error code
Re: [Homebrew_PCBs] Drills and stands
2012-05-15 by DJ Delorie
... I built a wooden dremel stand that almost never snaps bits (I ve snapped far more by dropping them, than by drilling): www.delorie.com/pcb/dremel-stand/ If
Re: [Homebrew_PCBs] Re: Drills and stands
2012-05-15 by Zoran A. Scepanovic
... I use it all the time. Drilled couple thousand holes 0.7 mm dia. HTH -- Best Regards, Zoran A. Šćepanović zastos@gmail.com http://zastos.com +381 63
Re: Drills and stands
2012-05-15 by Howard
Hi Zoran Just had a look at the Proxxon TBM 220 It s top speed is only 8500 rpm, is this speed any good for tungsten carbide bits ? Howard
Re: [Homebrew_PCBs] Drills and stands
2012-05-15 by Zoran A. Scepanovic
... Proxxon TBM 220 -- Best Regards, Zoran A. Šćepanović zastos@gmail.com http://zastos.com +381 63 609-993 -..- If a program is useful, it will have to be
Drills and stands
2012-05-15 by Howard
Hi All Am having some probs with my drill stand setup. The stand is the type with a single slide piller, it is meant for a 240v work drill (i use a dremel
Re: [Homebrew_PCBs] Re: Slow Etch?
2012-05-15 by Spencer W
This is what I use. 2 parts peroxide, one part muriatic acid
Re: [Homebrew_PCBs] Re: Slow Etch?
2012-05-15 by Donald H Locker
Sorry, I didn t write the formula and it was over five years ago. I do recall I purchased the H2O2 from Sally Beauty Supply. I can look up the product label
Re: [Homebrew_PCBs] Re: Slow Etch?
2012-05-15 by Spencer W
What ratio are you using? I would love to increase my etch times Sent from my iPhone ... [Non-text portions of this message have been removed]
Re: my old HP laser jet died
2012-05-15 by tda7000
I would agree with that!
Re: [Homebrew_PCBs] Re: Slow Etch?
2012-05-14 by Donald H Locker
I tried HCl with H2O2 (30%HCl with 30-volume H2O2 (about 9%, IIRC)) -- etched 1oz on FR4 fully in less than 10 minutes at room temperature. Donald. -- *Plain
Re: [Homebrew_PCBs] Re: Slow Etch?
2012-05-14 by Confidential
We ve tried 10oz copper a with Hcl/H2O2 on a ceramic dielectric. After several hours it was only about half way done. The addition of the PCB fab-in-a-box
Re: my old HP laser jet died
2012-05-14 by James Newton
Dude, seriously... Money spent on repairing that LJ 4 will be better spent than your time trying to mess with that Brother. Yeah, it may be a bit faster, but
Re: [Homebrew_PCBs] Re: Slow Etch?
2012-05-14 by Leon Heller
... When I tried HCl and H2O2 it was very fast, with no heating. Concentrated HCl is required, Leon -- Leon Heller G1HSM
Re: [Homebrew_PCBs] Re: Slow Etch?
2012-05-14 by Spencer
I use the same solution and noticed heating doesnt help either. The biggest improvement in time that I get with my board came from sticking an aquarium air
Re: Slow Etch?
2012-05-14 by Mike
I have started etching again after a year long break. I am using the pool acid and hydrogen peroxide etchant, but did the same with the bottle of pre-diluted
Re: [Homebrew_PCBs] my old HP laser jet died
2012-05-14 by Andrew Hakman
How did a laserjet 4 manage to die - those things are like tanks! Some people say the Brother printers don t work because the toner has a higher melting
my old HP laser jet died
2012-05-14 by tn_medic24100
I used to have an old laser jet 4 that I used to print and transfer with but unfortunately after several moves it is doa. My wife bought me a new Brother
Re: GBC H220 HeatSeal QuickStart 9.5" LAMINATOR
2012-05-12 by AlienRelics
Also look for GBC_laminator_mod In the Photos section:
Re: GBC H220 HeatSeal QuickStart 9.5" LAMINATOR
2012-05-12 by AlienRelics
From the Links section under Toner Transfer, Laminators, there is a link to modifying the GBC H200: http://www.qsl.net/ve2emm/pcb/pcb_mach_mod_e.html That
Re: [Homebrew_PCBs] Slow Etch?
2012-05-12 by Leon Heller
... I use these packs of FeCl3 and make the solution up myself according to the instructions:
Re: [Homebrew_PCBs] Slow Etch?
2012-05-12 by Randall Morgan
Yes, I ve heard that said. I have kept it a couple years without issue as long as it is well sealed. So I would be curious to know the actual concentration of
Re: GBC H220 HeatSeal QuickStart 9.5" LAMINATOR
2012-05-12 by krisfr
Can someone direct me to the modification of this laminator so I can make some great pcbs. I got it in yesterday and it allowed me to use the board that I
Re: [Homebrew_PCBs] Slow Etch?
2012-05-12 by Leon Heller
... Ferric chloride solution shouldn t deteriorate, unlike some other etchants. Leon -- Leon Heller G1HSM
Re: [Homebrew_PCBs] Slow Etch?
2012-05-12 by Randall Morgan
Radio Shack does sell a ready to use solution that does not need diluting. But heating it does make a big difference. Also, it does not seem to work as well
Re: [Homebrew_PCBs] Slow Etch?
2012-05-12 by Leon Heller
... Most FeCl3 in liquid form is concentrated, and needs to be diluted to work properly. You should have put your etching container in a larger container with
Re: [Homebrew_PCBs] Slow Etch?
2012-05-12 by Paul
Hi John Congratulations on that first board. But don t worry, some problems happen to all of us from time to time. I have been making PCBs at home for years
Re: Slow Etch?
2012-05-12 by epareja2
Let me tell you that the scale thing haopened to me in a very large pcb and I was very angree with myself. The etchant is ferric cloride? Did you move the
Slow Etch?
2012-05-12 by John
After several false starts I got a board ready to etch. I went to Radio Shack and bought a bottle of etchant. It was a chilly(68 F), rainy day so I put enough
Re: [Homebrew_PCBs] Re: Long-Term CuCl2 setup
2012-05-11 by Donald H Locker
Thank you, Adam. I downloaded your original file back in 2007 or 2008 and printed it for my library, but have wondered since why it disappeared. I find it hard
Re: [Homebrew_PCBs] Re: Long-Term CuCl2 setup
2012-05-11 by Adam Seychell
... Yes sure. I m note sure what happened to the original web site. Someone converted to PDF and made it available at:
Re: [Homebrew_PCBs] Re: Long-Term CuCl2 setup
2012-05-11 by Donald H Locker
Hey, Adam. Is it OK to save and distribute to friends copies of your [excellent] write-up of CuCl2 etchant chemistry? Many thanks, Donald. -- *Plain Text*
Re: [Homebrew_PCBs] Re: Water-free Toner Transfer with ... baking paper??
2012-05-10 by KPL
another very similar thing I have tried that did not work, was a base paper of adhesive aluminium foil, from a building store. Same problem, toner just falls
Re: [Homebrew_PCBs] Re: Long-Term CuCl2 setup
2012-05-10 by John Anhalt
That is the reason I qualified my comment. Also responded with some links. John ... From: Adam Seychell To: Homebrew_PCBs@yahoogroups.com Sent: Thursday, May