Re: [Homebrew_PCBs] Re: TT results - HP 2015, HP Laser Glossy paper, GBC 2130, HCl + H2O2, hotplate
2010-02-07 by DJ Delorie
My aluminum top-plate is only 1/4 thick, works great.
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Re: TT results - HP 2015, HP Laser Glossy paper, GBC 2130, HCl + H2O2, hotplate
2010-02-07 by awakephd
Piers, I am using plain old rosin-core solder from Radio Shack -- nothing fancy. I m using a small flux brush to brush on the flux and to brush the solder
Re: TT results - HP 2015, HP Laser Glossy paper, GBC 2130, HCl + H2O2, hotplate
2010-02-07 by sailingto
Yep, that is the HP paper I m using also. The cover looks a bit different, but the Q2546A part number is the same. I ll have to try peeling it off while hot,
Re: [Homebrew_PCBs] Re: TT results - HP 2015, HP Laser Glossy paper, GBC 2130, HCl + H2O2, hotplate
2010-02-06 by Piers Goodhew
What sort of solder are we talking? Paste, normal resin-core wire, or somethig else? What are you brushing it (excess solder) off with? I have never
Re: TT results - HP 2015, HP Laser Glossy paper, GBC 2130, HCl + H2O2, hotplate
2010-02-06 by awakephd
Some followup -- I made a board last night, and etched, drilled, and tinned it this morning. The process was the same as described below, except I managed to
Re: TT results - HP 2015, HP Laser Glossy paper, GBC 2130, HCl + H2O2, hotplate
2010-02-06 by awakephd
That s the one I m using. When I first tried it, I thought I had made a big mistake in buying it -- when I let it cool and then tried to soak it off. It never
Re: [Homebrew_PCBs] Re: TT results - HP 2015, HP Laser Glossy paper, GBC 2130, HCl + H2O2, hotplate
2010-02-06 by DJ Delorie
... The loop is too big to be useful that way, esp when the initial ramp-up works just fine for reflow anyway. It s like a three MINUTE response curve. I d
Re: [Homebrew_PCBs] Staples Photo basic paper
2010-02-06 by Piers Goodhew
We saw a similar post on Jan 25 (my time) so it must be true. Not a problem for me as I live outside the US and couldn t get the stuff anyway, but a black day
Staples Photo basic paper
2010-02-06 by designer_craig
I thought I would try the Staples photo basic paper today. Staples must be using a different supplier, it doesn t work at all any more. I got a good image
Re: TT results - HP 2015, HP Laser Glossy paper, GBC 2130, HCl + H2O2, hotplate
2010-02-06 by designer_craig
Is this the HP paper you are using? HP color Laser Presentation Paper, Glossy 34# HP Color Laser Presentation Paper
Re: [Homebrew_PCBs] Re: TT results - HP 2015, HP Laser Glossy paper, GBC 2130, HCl + H2O2, hotplate
2010-02-06 by Stefan Trethan
So what? Just because it has mass it can t be controlled? It ll work just fine even with a simple on/off controller. Put an aluminium plate on top of it to
Re: [Homebrew_PCBs] Re: TT results - HP 2015, HP Laser Glossy paper, GBC 2130, HCl + H2O2, hotplate
2010-02-06 by Piers Goodhew
... I haven t tried the tinning part, but I ve soldered SMD parts using an alu frypan over a gas flame - no board discoloration, take it off when all the
Re: TT results - HP 2015, HP Laser Glossy paper, GBC 2130, HCl + H2O2, hotplate
2010-02-06 by awakephd
... In my case, it is *literally* a hot plate -- a piece of aluminum sitting on a portable one-eye electric burner. I am wanting to move towards surface mount
Re: [Homebrew_PCBs] Re: TT results - HP 2015, HP Laser Glossy paper, GBC 2130, HCl + H2O2, hotplate
2010-02-06 by DJ Delorie
... I ve thought of that, but mine is cast iron - it has way too much thermal mass to be accurately controlled *at all*. It takes about three minutes to get
Re: TT results - HP 2015, HP Laser Glossy paper, GBC 2130, HCl + H2O2, hotplate
2010-02-06 by James
... You could attach a thermistor to the hot plate and build a simple temperature control circuit to keep the temperature FAR more stable than the controls, if
Re: TT results - HP 2015, HP Laser Glossy paper, GBC 2130, HCl + H2O2, hotplate
2010-02-06 by awakephd
... Excellent hint, thanks!
Re: [Homebrew_PCBs] TT results - HP 2015, HP Laser Glossy paper, GBC 2130, HCl + H2O2, hotplate
2010-02-05 by DJ Delorie
... A hint for photographing very close up: Use a sheet of plain white paper to diffuse the flash. Hold it above the object such that one edge of the paper is
Re: [Homebrew_PCBs] TT results - HP 2015, HP Laser Glossy paper, GBC 2130, HCl + H2O2, hotplate
2010-02-05 by DJ Delorie
... I have bigger patterns like this here: http://www.delorie.com/pcb/spirals/ ... Hot plates keep getting hotter and hotter. I found that I *can t* use the
Re: [Homebrew_PCBs] TT results - HP 2015, HP Laser Glossy paper, GBC 2130, HCl + H2O2, hotplate
2010-02-05 by Leon Heller
... You must have overheated the board for it to turn brown. Leon
TT results - HP 2015, HP Laser Glossy paper, GBC 2130, HCl + H2O2, hotplate
2010-02-05 by awakephd
I have only done three or four toner-transfer boards, with acceptable results. But recently I acquired a laminator, and I picked up an inexpensive hotplate, so
Re: [Homebrew_PCBs] Re: Is Ferrich Chloride safer than Muriatic Acid / Peroxide?
2010-02-05 by DJ Delorie
... Pipe bomb if you do that to CuCl etchant.
Re: [Homebrew_PCBs] Re: Is Ferrich Chloride safer than Muriatic Acid / Peroxide?
2010-02-04 by Adam Seychell
... CuCl2 is hygroscopic and difficult to evaporate. Garden or builders lime is a cheap source of impure calcium hydroxide and is good way to nutralize (i.e -
FabLab report - Seattle Dorkbot Feb 3, 2010
2010-02-04 by Steve Greenfield
Cameron and I went to the Dorkbot FabLab last night at the UW campus in the ART building. The room was packed. There were the three planned speakers, plus the
Re: Is Ferrich Chloride safer than Muriatic Acid / Peroxide?
2010-02-04 by James
... I ve recently switched to CuCL which starts out as acid and peroxide. So far I m quite impressed, the stuff is certainly less messy, you can see the board
Re: [Homebrew_PCBs] Is Ferrich Chloride safer than Muriatic Acid / Peroxide?
2010-02-03 by DJ Delorie
... I ve never needed one. CuCl becomes CuOH when the pH rises above 7, and precipitates. You can just watch and see, it s its own indicator. If FeCl does
RE: [Homebrew_PCBs] Is Ferrich Chloride safer than Muriatic Acid / Peroxide?
2010-02-03 by Jim Barnes
Hi, I googled neutralizing ferric chloride and found the following Q&A article, which seems pertinent. In college, my physics was much better than my
Re: Liquid Tin
2010-02-03 by Dave
... If it wasn t exposed to air, it would last many months. If exposed to air (as in some fool left it out in the plating tray overnight), then it would die
Re: [Homebrew_PCBs] Is Ferrich Chloride safer than Muriatic Acid / Peroxide?
2010-02-03 by Stefan Trethan
High concentrations are definitely nasty. The stuff heats up on it s own then and releases lotsa fumes. I ve tried with a tiny amount once and after only 10
Re: [Homebrew_PCBs] Is Ferrich Chloride safer than Muriatic Acid / Peroxide?
2010-02-03 by Philip Pemberton
... Though arguably that would make the HCl+H2O2 mix more risky near furnaces, etc. (though isn t the combustion section of most modern boilers effectively
Re: [Homebrew_PCBs] Is Ferrich Chloride safer than Muriatic Acid / Peroxide?
2010-02-03 by Stefan Trethan
Oxygen doesn t either, but accelerates any fire. I don t think there is a danger. ST
Re: [Homebrew_PCBs] Is Ferrich Chloride safer than Muriatic Acid / Peroxide?
2010-02-03 by DJ Delorie
... Both have copper in them after being used, so they re both considered hazardous waste. ... Chlorine gas doesn t burn. Well, it burns your lungs, but it
Is Ferrich Chloride safer than Muriatic Acid / Peroxide?
2010-02-03 by nathan_h_tna
Which is safer to use and easiest to dispose of? i.e. which can I flush down the toilet ;-) I ve used the Muriatic Acid / Peroxide solution for a couple of
RE: [Homebrew_PCBs] Drilling
2010-02-03 by Jim Barnes
Hi, If the Dremel s problem is mainly the collet, you might try the Dremel Chuck. It s a steel (according to my magnet), three-jaw, keyless chuck. Though
Re: [Homebrew_PCBs] Re: Liquid Tin
2010-02-02 by David Griffith
... What s its shelf-life in solution? -- David Griffith dgriffi@cs.csubak.edu A: Because it fouls the order in which people normally read text. Q: Why is
Re: Liquid Tin
2010-02-02 by Dave
... Yes, Hydrogen Sulfide will dull the sense of smell, possibly allowing the person breathing it to receive a fatal dose. Use caution! I used to have a
RE: [Homebrew_PCBs] Drilling
2010-02-02 by Herbert E. Plett
I use the Dremel stand, but previously I cared to shim the (vertical) guides tight enough to remove the floppiness. works very well, no danger of breaking
Re: [Homebrew_PCBs] spin-coating resist
2010-02-01 by Larry Battraw
... I ve used a old 12V computer fan running on 6V with a baby-food jar lid hot-glued to the the fan spindle (The lid is glued upside down). I then place a dab
spin-coating resist
2010-02-01 by David Griffith
Here s yet another question on the photographic method. Has anyone tried making their own spinner for applying resist? It seems like it would be simple and
Re: [Homebrew_PCBs] Re: Liquid Tin
2010-02-01 by Simao Cardoso
... If cold water works, great. I have washed fat dirty dishes with cold water some times already. And to who says it s expensive. This side of the Atlantic
Re: [Homebrew_PCBs] Re: Liquid Tin
2010-02-01 by Harvey White
... If you re in the Birmingham area, Forbes used to have it, as well as some other MG chemicals. No idea if they still do. Check Mouser or Digikey amongst
Re: [Homebrew_PCBs] Re: Liquid Tin
2010-02-01 by Stefan Trethan
Well the tin isn t coming from nothing, so it must definitely wear out eventually. ST
Re: [Homebrew_PCBs] Re: Liquid Tin
2010-02-01 by Brian Lalor
On Mon, 01 Feb 2010 18:21:22 -0000, sailingto ... to ... I bought a bottle from Mouser for about $30, for 8oz, I think. Quite pricey.
Re: Liquid Tin
2010-02-01 by sailingto
Folks, ya ll have talked so much about the great finish given by this tin stuff, I just might have to order a bottle - Any suggestions of a place to order from
Re: Drilling
2010-02-01 by twb8899
... I have one of these small drill presses and they work good. Spindle run out is minimal and they don t cost much. There are always a few on ebay ranging
Re: [Homebrew_PCBs] Re: Liquid Tin
2010-02-01 by lists
In article , ... It s the Thiourea, which, incidentally, is reputed to be carcinogenic. -- Stuart
Re: [Homebrew_PCBs] Re: Liquid Tin
2010-02-01 by David Griffith
... That might be the thiourea giving off hydrogen sulfide. If you think you can tough out that smell, you re intoxicated with it. -- David Griffith
Re: Liquid Tin
2010-02-01 by Chris
I have been using the same bottle for about 2 years now (give or take a bit). I pour it into an old film developing tray, toss my PCB into it for a couple of
Re: [Homebrew_PCBs] Drilling
2010-02-01 by Stefan Trethan
The proxxon collets have slightly larger diameter and don t fit into the dremel. ST
Re: [Homebrew_PCBs] Drilling
2010-02-01 by Harvey White
... I can understand that one. ... The drill stand wobbles from side to side, which could be fixed. I never bothered because it did work. Takes a bit of
Re: [Homebrew_PCBs] Drilling
2010-02-01 by Harvey White
... They didn t mention it specifically, but the implication on the larger (and more expensive) one was that it *was* built for continuous operation. It s