Etching
2012-11-24 by Rick Sparber
Donald, We were asked to move this discussion to homebrew_PCBs so I have done so. You are right about the agitation of the ferric chloride but there is more to
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Re: Good place to get PCB drill bits?
2012-11-24 by ab1jx
ESR has some interesting stuff, but I m in the US so drillcity looks like the way to go. I didn t realize that PC board fabrication is a whole sub-industry
Re: [Homebrew_PCBs] gerber file
2012-11-23 by Andrew Hakman
If you already have the layout done, most software will export to a gerber. The only ones that I m aware of that won t are the ones that are tied to one PCB
Re: [Homebrew_PCBs] success!
2012-11-23 by StoneTool
Rick: Have you opted against the bubble agitation system altogether? Sounds like a simple and logical method the way it was presented. Howard
RE: [Homebrew_PCBs] success!
2012-11-23 by Jeff Heiss
You can use a 21 step stouffer gauge ($12) to check where you are in relation to the optimal exposure time. 2.5 sounds close. The closer the bulb, the more
Re: [Homebrew_PCBs] success!
2012-11-23 by Mitch Davis
... Congratulations, feels good eh? Mitch.
success!
2012-11-23 by Rick Sparber
A friend looked at my pictures of my failed etchings and suggested I lower my UV light and greatly extend the exposure time. I went from 7 down to 2.5 and
gerber file
2012-11-23 by trvrlock
I have two small pcb designs that I need converted to gerbers Is there anyone that does that. I have the copper tracks and silk in pdf files all firms I have
Re: [Homebrew_PCBs] Good place to get PCB drill bits?
2012-11-23 by Leon Heller
I buy mine from ESR (reground tungsten carbide reduced shank): http://www.esr.co.uk/electronics/products/frame_pcb.htm Leon -- Leon Heller G1HSM
Re: [Homebrew_PCBs] Good place to get PCB drill bits?
2012-11-23 by Jan Kok
I have bought drill bought drill bit assortments from Drill Bit City www.store.yahoo.com/drillcity and been pleased with the quality. They also come in nice
Re: Ratio of Ferric Chloride to copper?
2012-11-23 by smilingcat90254
me bad yes you are right. It s atomic weight one should be using. This is what happens late at night. :embarassed: The reaction as I understand it is two fold.
Re: [Homebrew_PCBs] Good place to get PCB drill bits?
2012-11-23 by Mark Lerman
I just got some from . The have all kinds of do-it-yourself assortments and also have router bits. They came nicely packaged in great
Re: [Homebrew_PCBs] Good place to get PCB drill bits?
2012-11-23 by Harvey White
... Harbor Freight has an assortment, resharpened, of about 20 for roughly six dollars. That s both on line and in the stores if they still carry it. Now if
Re: [Homebrew_PCBs] Good place to get PCB drill bits?
2012-11-23 by jeremy youngs
allelectronics has them in bulk ... -- jeremy youngs [Non-text portions of this message have been removed]
Re: [Homebrew_PCBs] Good place to get PCB drill bits?
2012-11-23 by John Anhalt
I bought a bunch of resharpened bits for less than $0.10 each a few years ago (boxes of 50). They were labeled Magatool Chip Saver and have worked well. The
Re: [Homebrew_PCBs] Good place to get PCB drill bits?
2012-11-23 by Kerry Wentworth
I don t know as I d say I do this a lot, but I usually buy resharpened bits from Electronic Goldmine for $1 each. Lately, though, the smallest the have is
Re: Homebrew etching chemicals
2012-11-23 by AlienRelics
Not sulphuric, muriatic acid and hydrogen peroxide. It depends on what concentration of hydrogen peroxide you get. The simplest is 2 parts drugstore hydrogen
Re: [Homebrew_PCBs] first step into convection etching
2012-11-23 by John Anhalt
@Rick Sparber Your last picture is most revealing. Apparently, you are faced with a difficult etching process as described in the Electronics_101 thread you
RE: [Homebrew_PCBs] first step into convection etching
2012-11-23 by Rick Sparber
I wish more of the discussion from the electronics_101 BBS had been done over here. Some felt that laminar flow had a lot of advantages although was slower.
Homebrew etching chemicals
2012-11-23 by pauldebono@rocketmail.com
What is the exact formula for making an echant, using hydrogen peroxide, sulpheric acid and distilled water please. Or has there been others ?
Re: [Homebrew_PCBs] first step into convection etching
2012-11-23 by Donald H Locker
Laminar flow is not good for etching. Turbulence is desirable to enhance the exchange of spent and fresh etchant at the surface of the board. In pure laminar
Re: [Homebrew_PCBs] Good place to get PCB drill bits?
2012-11-23 by Donald H Locker
Re-sharpened bits are usually a good deal. As long as you are doing manual drilling, the length doesn t matter too much (until the drill s too short.) Ebay
cross posted: board etching question and answer
2012-11-23 by Rick Sparber
This is part of a thread that started on Electronics_101. Rick ... From: Electronics_101@yahoogroups.com [mailto:Electronics_101@yahoogroups.com] On Behalf Of
first step into convection etching
2012-11-23 by Rick Sparber
Although I have done analog circuit design for 50 years, I m a relative newbie when it comes to circuit board etching. Furthermore, my last chemistry class
Re: [Homebrew_PCBs] Re: Ratio of Ferric Chloride to copper?
2012-11-23 by John Anhalt
First off, you seem to have confused atomic number, which is the number of protons in the atom, with atomic weight. The atomic weight of copper is 63.5 and
Re: [Homebrew_PCBs] Re: Ratio of Ferric Chloride to copper?
2012-11-23 by Russell Shaw
... It makes extremely good weed killer. It will leave a black spot on the lawn, but it recovers after a few weeks. Drain unblocker/root-killer for toilets is
Re: Ratio of Ferric Chloride to copper?
2012-11-23 by smilingcat90254
As a rule of thumb, transition metal salt such as copper chloride are very toxic. DO NOT pour it down the drain. Neutralize it first with sodium carbonate.
Good place to get PCB drill bits?
2012-11-23 by ab1jx
Far circuits sells carbide tipped PCB drills with large (1/8?) shanks, but they re way too expensive from them. I m looking for cheap ones, but not unusably
RE: [Homebrew_PCBs] Re: Ratio of Ferric Chloride to copper?
2012-11-23 by MIKE DURKIN
It does wondrous things to blood ... fixes the copper in hemoglobin and you suffocate .... don t drink (Duhh ) ... don t splash it on ya ... etc. Be safe ...
Re: Pcb to G code
2012-11-23 by RL
Yes I have been a member of both groups for a while but had to put the idea of cutting a board with a CNC until I could build one. I have eched a few boards
Re: Ratio of Ferric Chloride to copper?
2012-11-23 by smilingcat90254
hmmm... can t really go by volume of FeCl3 (Ferric chloride) and volume of copper. Wht you need to know is how many moles of each (chemists way of counting
Re: Pcb to G code
2012-11-21 by mark
I haven t really made it to milling circuit boards quite yet with my project but found this when I started getting closer.
Ratio of Ferric Chloride to copper?
2012-11-21 by RickS
Does anyone know the ratio of needed Ferric Chloride by volume to the volume of copper being removed? I am assuming 110F for the acid and constant agitation.
Re: [Homebrew_PCBs] Re: Anyone make PCB for others ?
2012-11-20 by D. Daniel McGlothin
Bill, In looking for something else, I found this $8 kit. It will do all that your Tram sensor did, except work for the 200 or 2000 watts. I recommend that
Re: [Homebrew_PCBs] Pcb to G code
2012-11-20 by Art Eckstein
OOPS, just noticed your already a member of the yahoo group. Also, I did not realize until after my previous post that pcbgcode.com was a seperate addon to
Re: [Homebrew_PCBs] Pcb to G code
2012-11-20 by Mitch Davis
... If your question is about converting gerber files to g-code, then several of my friends use this: http://sourceforge.net/apps/mediawiki/pcb2gcode It works
Re: [Homebrew_PCBs] Pcb to G code
2012-11-20 by Harvey White
... There s a yahoo group specifically for this, and John is active on it. ... I d just join the group, you might consider the autoleveler software addon, too.
Re: [Homebrew_PCBs] Pcb to G code
2012-11-20 by Art Eckstein
I use pcb2gcode and there is both a yahoo group and a stand alone phorum for it. It is an ULP addin to eagle and is freeware.
Pcb to G code
2012-11-20 by RL
I am trying to convert my Eagle Board file to a Gcode to drill holes with my CNC mach. but I have been unable to contact anyone from PCBGCODE.com to get the
Re: [Homebrew_PCBs] Re: Anyone make PCB for others ?
2012-11-20 by Duane C. Johnson
... More clues: D. /DeMaw/, “/In-Line RF Power Metering/,” QST, Dec 1969 http://www.g0kla.com/600WAmp/600wAmp.php Duane -- Home of the $35 Solar Tracker
Re: [Homebrew_PCBs] Re: Anyone make PCB for others ?
2012-11-20 by Norm
Closer inspection - they re not EXACT duplicates - minor circuit modifications one way or the other, but they both work on the same principle. Comments below
Re: [Homebrew_PCBs] Re: Anyone make PCB for others ?
2012-11-20 by Norm
There is nothing magic about this circuit! It is a duplicate of the one in *_QST_*, December, 1969 pg. 11, or the 1970 *_Radio Amateur s Handbook_*, pp.
Re: Anyone make PCB for others ?
2012-11-20 by smilingcat90254
I went to the photo page. The schematic is what you are calling to be the sensor I take it. Most everything is straight forward except for the toroidal
Re: [Homebrew_PCBs] Re: Anyone make PCB for others ?
2012-11-20 by Peter Johansson
... Is there something special about this piece of equipment? Do you have a particular need for vintage equipment? You could probably purchase a new meter for
Re: Anyone make PCB for others ?
2012-11-20 by herpsrwe
Thanks. I am looking for a good woman who cooks, cleans and has electronic test gear. Please send photos of test gear. As stated in a previous post, I placed a
Re: [Homebrew_PCBs] Old FeCl3 Still Good?
2012-11-19 by DJ Delorie
I have some that s 30 years old and still works.
Re: [Homebrew_PCBs] Re: Anyone make PCB for others ?
2012-11-19 by Kevin Impson
Hi Bill, My father was a analog man and as such I learned analog before digital... he always said, If you know how to do it in analog, then you know it.
Re: Anyone make PCB for others ?
2012-11-19 by smilingcat90254
Okay I ll bite. :) Hope your manly ego isn t hurt... Me female. If the design is from 1978 for HAM radio most likely the board is two sided. Very unlikely that
Re: [Homebrew_PCBs] Old FeCl3 Still Good?
2012-11-19 by Russell Shaw
... It will be ok, except some solids may have settled out making it less potent. The way to fix that (as i did with mine) is shake the bottle well and make
Re: Old FeCl3 Still Good?
2012-11-19 by tda7000
The only way you will really know is to just try it out and see. If it doesn t work, get some more. If it does, great!