Re: [Homebrew_PCBs] Mercury lamp for UV exposure
2006-10-14 by Zoran A. Scepanovic
Hello Leon, ... PLEASE DO NOT BREAK THE OUTER GLASS! You will end up with lot of shortwave UV AKA UV-C. Photoresists are sensitive (peak) arround 340 nm
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Re: Chemicals and prototyping (was: Removing ferric chloride stains)
2006-10-14 by Steve
... World domination? http://groups.yahoo.com/group/Mad_Scientist Steve Greenfield
Re: [Homebrew_PCBs] Mercury lamp for UV exposure
2006-10-13 by Leon Heller
... From: Dwayne Reid To: Sent: Friday, October 13, 2006 5:25 PM Subject: Re: [Homebrew_PCBs]
Re: [Homebrew_PCBs] Mercury lamp for UV exposure
2006-10-13 by Dwayne Reid
... Couple of things: make sure that the phosphor is on the inside surface of the OUTER envelope. That pretty much guarantees that the inside bulb is clear,
Re: [Homebrew_PCBs] Mercury lamp for UV exposure
2006-10-13 by guja
do not remove the outer envelope. first make test exposures (with envelope). Leon Heller wrote: Next step is to remove the outer
Mercury lamp for UV exposure
2006-10-13 by Leon Heller
I ve just bought a ballast to go with a mercury lamp I bought on Ebay. I ve just connected them up and the lamp is working OK. I rather stupidly put it on the
Re: [Homebrew_PCBs] Muratic/Peroxide Mix
2006-10-12 by Stefan Trethan
... What you need to do is migrate to a proper CuCl. Basically you keep your etchant going by adding small amounts of hydrogen peroxyde and hydrochloric acid.
Re: Tip: Repairing a HP LJ-III pickup roller.
2006-10-12 by Steve
... search, so ... cheer he ... It s certainly better than those on other lists who post before even the most rudimentary of searches. Electronics_101 gets
Muratic/Peroxide Mix
2006-10-12 by nixiebuilder
Hi all, New to this group, but not to Yahoo Groups. Background: I have 8 years being a Sr Mechanical Designer in Cali, for Fujitsu Bus Comm in Anaheim, just
Re: [Homebrew_PCBs] Re: Chemicals and prototyping (was: Removing ferric chloride stains)
2006-10-12 by Stefan Trethan
On Thu, 12 Oct 2006 16:41:05 +0200, lcdpublishing ... No it wouldn t, but they would have had to find another way to learn to fly planes. Their strange
Re: Chemicals and prototyping (was: Removing ferric chloride stains)
2006-10-12 by lcdpublishing
Your right about it not stopping them. Those idiots that decided to fly some planes into the buildings 5 years ago sure didn t stop and think, gee, I don t
Re: [Homebrew_PCBs] (OT) Political rants 'n' stuff (was Re: Chemicals and prototyping)
2006-10-12 by Philip Pemberton
... Yep. Officially you re not supposed to sell Isopropyl Alcohol in the UK as it s used for drug production (not sure which drug, and I don t really care
Re: [Homebrew_PCBs] Re: Chemicals and prototyping (was: Removing ferric chloride stains)
2006-10-12 by Stefan Trethan
On Thu, 12 Oct 2006 14:26:16 +0200, lcdpublishing ... The thought is the stuff should be harder to get. Nobody cares about breaking the law, but if you can t
Re: Chemicals and prototyping (was: Removing ferric chloride stains)
2006-10-12 by lcdpublishing
Are you guys serious about not being able to buy Acetone and other such solvents? If so, what the heck is the goverment trying to prevent? Really seems as
Re: [Homebrew_PCBs] Chemicals and prototyping (was: Removing ferric chloride stains)
2006-10-12 by Stefan Trethan
On Thu, 12 Oct 2006 00:07:24 +0200, Philip Pemberton ... Ok, what about lime (from the builders yard)? ST
Chemicals and prototyping (was: Removing ferric chloride stains)
2006-10-11 by Philip Pemberton
... Yep. Probably by getting a ticket on the Dover-to-Calais ferry, picking up a few bottles of whatever they want from the continent, then coming back on the
Re: [Homebrew_PCBs] Re:Removing ferric chloride stains
2006-10-11 by Stefan Trethan
On Wed, 11 Oct 2006 18:04:32 +0200, Philip Pemberton ... The sad thing is, none of the restrictions is likely to make much difference to terrorists, they ll
Re: [Homebrew_PCBs] Re: Tip: Repairing a HP LJ-III pickup roller.
2006-10-11 by Stefan Trethan
On Wed, 11 Oct 2006 17:45:24 +0200, Myc Holmes ... But he had one useful point though, is it definitely the oil of wintergreen doing
Re: [Homebrew_PCBs] Re:Removing ferric chloride stains
2006-10-11 by Philip Pemberton
Stefan Trethan wrote: [ banning of peroxide ] ... They ve already done it with acetone (or at least the stuff that isn t adulterated with perfume, vitamin XYZ
Re: [Homebrew_PCBs] Re: Tip: Repairing a HP LJ-III pickup roller.
2006-10-11 by Myc Holmes
Len, I am just so impressed with your ability to plagiarize a google search, so you do get the gold medal. Come on everyone let s give Len the big cheer he
Re: Tip: Repairing a HP LJ-III pickup roller.
2006-10-11 by Len Warner
... As its name suggests, oil of wintergreen used to be a plant extract but nowadays is often its pure synthetic equivalent, methyl salicylate. As such, it is
Re: [Homebrew_PCBs] Tip: Repairing a HP LJ-III pickup roller.
2006-10-10 by lists
In article , ... Oil of Wintergreen used to be sold for medicinal purposes. IIRC it was used for aches and pains - painful
Re: [Homebrew_PCBs] Re: Surface-mount soldering
2006-10-10 by Philip Pemberton
... Neat. Let s see... £20 for the oven, about the same again to build a clone of Elektor s temperature controller, two days of lunch breaks to port the T-con
Re: [Homebrew_PCBs] Re: Surface-mount soldering
2006-10-10 by DJ Delorie
... I ve got a magnifying visor I use with 2.5x and 3.75x optics for it. It s an OptiVisor, made by Donegan Optical Co in the USA. Woodcraft sells them. The
RE: [Homebrew_PCBs] Re: Surface-mount soldering
2006-10-10 by Keith Doxey
H Len ... Thanks for the heads up on the toaster oven. Will take a look on Monday. I hope the offer is on here as they do vary from store to store. Couldnt
Re: Surface-mount soldering
2006-10-10 by Len Warner
... Just a heads up for our UK readers that Lidl is offering an Electric Grill and Oven for £19.99 in its Weekly Specials on Monday 16th October, 2006.
Re: [Homebrew_PCBs] Re: Surface-mount soldering
2006-10-10 by \M
From a former collegue who has wide experience from components and testing of the same, I got a warning on soldering ceramic SMD caps. Never poke the soldering
Re: [Homebrew_PCBs] Re:Removing ferric chloride stains
2006-10-10 by Stefan Trethan
On Tue, 10 Oct 2006 02:41:48 +0200, Bill Maxwell ... I was voicing such fears right after London, i hope they don t go through with it
Re: [Homebrew_PCBs] Re:Removing ferric chloride stains
2006-10-10 by Bill Maxwell
There is news media story current here in Australia that hydrogen peroxide is about to be, or has been, placed on the controlled chemicals list because of its
Re: Surface-mount soldering
2006-10-09 by jr_dakota
Problem is once you get the hang of it you are just going to hate mounting SMT caps and resistors because you can do a 40-80 pin IC faster than a couple of SMT
Re:Removing ferric chloride stains
2006-10-09 by Len Warner
... Fisio, if you look back in the message archive you will see that this thread is for people who already have ferric stains and would like to be rid of them.
Re: Removing ferric chloride stains
2006-10-08 by adriano-sar
... use the muriatic acid with hydrogen peroxide and does not remain residual, once used it is neutralized with of common bicarbonate
Who of you uses circad?
2006-10-08 by adriano-sar
Hi all, with this question I pick the occasion in order to introduce to me, I write from Italy, use for my designs Circad, therefore we can exchange
Surface-mount soldering
2006-10-06 by Leon Heller
I ve just made a PCB which uses a Mega8 AVR in the LQFP package. I don t tin my boards, and usually solder the leads of that sort of chip one at a time after
Re: UV Light Sources
2006-10-04 by Steve
... I spoke to him off list and we ve got it all sorted out. I was upset at Derek for baiting, and John for taking the bait. It didn t help that one of my
Re: [Homebrew_PCBs] Removing ferric chloride stains
2006-10-03 by JanRwl@AOL.COM
In a message dated 10/3/2006 2:33:18 P.M. Central Daylight Time, stefan_trethan@gmx.at writes: I am told a little hydrochloric acid does the job too, but
Re: [Homebrew_PCBs] Removing ferric chloride stains
2006-10-03 by lists
In article , ... The commercial FeCl3 stain remover I purchased (RS Components in the uk, or maybe Farnell) contains
Re: [Homebrew_PCBs] Re: UV Light Sources
2006-10-03 by lists
In article , ... Probably because your comment appears to be to John s post, at least ... Please watch your language and your temper.
Re: [Homebrew_PCBs] Removing ferric chloride stains
2006-10-03 by Stefan Trethan
On Tue, 03 Oct 2006 22:23:25 +0200, Leon Heller ... phosphoric acid is also used to remove rust, maybe it works? Try coca cola. ST
Re: [Homebrew_PCBs] Removing ferric chloride stains
2006-10-03 by Leon Heller
... From: Stefan Trethan To: Sent: Tuesday, October 03, 2006 7:34 PM Subject: Re: [Homebrew_PCBs]
Re: [Homebrew_PCBs] Re: EDM process for isolation milling?
2006-10-03 by Stefan Trethan
On Tue, 03 Oct 2006 21:43:41 +0200, roger lucas ... I dunno, but i d say it will at least require a few goats and voodoo dolls! How
Re: [Homebrew_PCBs] Re: EDM process for isolation milling?
2006-10-03 by roger lucas
Hi Curt, Good to hear from you again. The reason I am continuing to build a small EDM PCB Mill is because the machine can be left on it s own to plug away at
Re: [Homebrew_PCBs] Removing ferric chloride stains
2006-10-03 by Stefan Trethan
On Tue, 03 Oct 2006 14:42:16 +0200, leon_heller ... I am told a little hydrochloric acid does the job too, but haven t tried myself. Prior to learning that i
Re: EDM process for isolation milling?
2006-10-03 by curt_rxr
... Sure thing Chris, I started an EDM project about the same time the list was started. The reasons for choosing raster instead of vector were twofold.
Re: [Homebrew_PCBs] EDM process for isolation milling?
2006-10-03 by Cristian
... One spark per bit.
Removing ferric chloride stains
2006-10-03 by leon_heller
I was curious about the stuff sold for removing ferric chloride stains, so I looked up the Mega Electronics data sheet on the stuff they sell (its made by
EDM process for isolation milling?
2006-10-03 by lcdpublishing
Hi guys, About a year ago or so there was some talk of using EDM for isolation milling and such. Stefan was tinkering a bit with it and another fellow did some
Re: Solder resist ink
2006-10-03 by Andrew
... No - sorry. Don t know where to buy smaller ammounts. There will be cheaper places than think-tink but thats the smallest size I imagine. I would have
Re: [Homebrew_PCBs] Re: Solder resist ink
2006-10-03 by Myc Holmes
Andrew, I would think that the minimum purchase of one $200+ roll (40 ft by 12 ) puts the technology out of the range of most hobbyists. There is a big
Re: Solder resist ink
2006-10-02 by Andrew
... A UV hardened material specifically intended for the purpose perhapse? http://www.thinktink.com/stack/volumes/voli/store/specs/8130spec.htm You expose and