New file uploaded to Homebrew_PCBs
2004-05-22 by Homebrew_PCBs@yahoogroups.com
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the Homebrew_PCBs group. File :
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Re: Up for making a PCB? 5/18/04
2004-05-21 by kaytea2k
... Thanks for the reply. Some knowledge of things that should be always considered is helpful. Karega
Re: [Homebrew_PCBs] Re: Copper Pennies, was First PCB.... neutralizing the HCL
2004-05-21 by Jeremy Taylor
That would be me, I was going to do another long winded reply, with a subject change, but instead I hoped the poster would search the archives a-bit. - also
Re: Copper Pennies, was First PCB.... neutralizing the HCL
2004-05-21 by ballendo
Jan, Check out the group links section. Markus Zingg has a VERY nice setup... (Worth re-creating, IMO) Down side is that he uses Bungard chemicals, which are
Re: [Homebrew_PCBs] Re: Up for making a PCB?
2004-05-21 by mickeym
The free Eagle program has all of the symbols. I had some time so I started the schematic. But, I asked about pin 8 because the schematic shows it as a control
Re: [Homebrew_PCBs] Re: Up for making a PCB? 5/18/04
2004-05-21 by JanRwl@AOL.COM
Excellent, Dave! [Non-text portions of this message have been removed]
Re: Up for making a PCB? 5/18/04
2004-05-21 by Dave Mucha
... Though ... poster ... believe ... Please don t take our conversation as criticism. If you review the posts, we chat about things all the time and stray
Re: Up for making a PCB? 5/18/04
2004-05-20 by kaytea2k
I don t know what the problem is but I know that the design is sound. I have experience with design from the number of electrical/electronic engineering
Re: [Homebrew_PCBs] Re: Up for making a PCB? 5/18/04
2004-05-20 by Stefan Trethan
... If the board is made correct, and the schematic is wrong, the guy making the board can not be held responsible (or so it is written in the bible ;-) ) ...
Re: Up for making a PCB? 5/18/04
2004-05-20 by Dave Mucha
... your ... first. ... doubts and ... I agree, especially if you have confidence you KNOW the circuit works. On my boards, I will often add extra pairs of
Re: [Homebrew_PCBs] Re: Up for making a PCB? 5/18/04
2004-05-20 by Stefan Trethan
... Basically i agree on what you say, the above which i snipped off. But i do not agree that every any any board has to be breadboarded first. If you have a
Re: Up for making a PCB? 5/18/04
2004-05-20 by Dave Mucha
... ... ... simple ... and a ... it ... quick ... This is what I was saying in my post. Many on-line schematics are only
OT Re: Zinc/Copper Pennies At least from Denver in 2004
2004-05-20 by leon_heller
... were ... I meant UK pennies, the real ones. 8-) Leon
Re: Copper Pennies
2004-05-20 by Alan J. Franzman
... And lest anyone think they were pure copper before the 1982 change, ignoring the 1943 wartime steel cent, they were actually bronze (95%copper, 5% tin
Re: [Homebrew_PCBs] Re: Copper Pennies, was First PCB.... neutralizing the HCL
2004-05-20 by JanRwl@AOL.COM
In a message dated 5/20/2004 12:48:12 AM Central Standard Time, stefan_trethan@gmx.at writes: Not sure what is special about them.
Re: [Homebrew_PCBs] Re: Copper Pennies, was First PCB.... neutralizing the HCL
2004-05-20 by Stefan Trethan
... they use bog-standard screw terminals (big of course). Not sure what is special about them. I suspect the cable is no pure aluminum. I ve come across a few
OT Re: Zinc/Copper Pennies At least from Denver in 2004
2004-05-20 by ballendo
Leon, Not sure where you got this. The last--only--(USA)steel pennies were made in 1943. In 1981 they were changed to copper plated Zinc, due to a law which
Re: [Homebrew_PCBs] Got to learn Eagle (and documenting projects)
2004-05-20 by John Johnson
Yeah, you really should. It s well worth spending the time to learn it. Sharpen the saw, as they say. I think the trace isolation ULP (User Language Program)
OT Aluminum House Wire Re: Copper Pennies, was First PCB....
2004-05-20 by Steve
We re way off topic, but I ll finish this off by explaining the (mostly) complete reason why the use of aluminum house wiring failed in the US. Aluminum has a
Re: [Homebrew_PCBs] Re: Copper Pennies, was First PCB.... neutralizing the HCL
2004-05-20 by JanRwl@AOL.COM
In a message dated 5/19/2004 8:42:21 PM Central Standard Time, maxq668@sion.com writes: For houses copper is better because it s thinner and the resistance is
Re: [Homebrew_PCBs] Re: Copper Pennies, was First PCB.... neutralizing the HCL
2004-05-20 by MaxQ
Aluminum has more resistance than copper. That s why we use copper. Copper is a better electric conductor but more expensive. In High voltage lines the choice
Re: [Homebrew_PCBs] Re: Copper Pennies, was First PCB.... neutralizing the HCL
2004-05-20 by JanRwl@AOL.COM
In a message dated 5/19/2004 2:53:33 PM Central Standard Time, les@lnewell.screaming.net writes: Does anyone know why aluminum is bad for house wiring? (real
Re: Up for making a PCB? 5/18/04
2004-05-19 by Steve
... You dropped your reply smack in the middle of the quoted text. Makes it rather difficult to read. ; / If this needs to be tested still, why not head over
Re: [Homebrew_PCBs] Re: First PCB.... neutralizing the HCL
2004-05-19 by Adam Seychell
I know that iron salts are safe to dump (in reasonable concentrations), but that news about aluminum in the environment is good to know. So scrap iron it is.
Re: Up for making a PCB? 5/18/04
2004-05-19 by kaytea2k
... it is pretty simple design-wise. An input, a timer, a memory, and a processor. Albeit I haven t tested it, but that is why I brought it to forum. ...
Re: Up for making a PCB? 5/18/04
2004-05-19 by kaytea2k
Nope Pin 14 is for power. But the feedbak resistors are there because the receiver gives some interference. ... e:mail
Re: Copper Pennies, was First PCB.... neutralizing the HCL
2004-05-19 by leon_heller
... They are actually steel. Try a magnet on one. 8-) Leon
Re: [Homebrew_PCBs] Re: Copper Pennies, was First PCB.... neutralizing the HCL
2004-05-19 by Les Newell
If I remember correctly aluminium wire will creep under load so you lose the contact pressure. This is also a problem with solder so don t tin your wires if
Re: [Homebrew_PCBs] Re: Copper Pennies, was First PCB.... neutralizing the HCL
2004-05-19 by Stefan Trethan
... aluminium forms a oxyde layer which is isolating. - resistance - heat - fire - no more house... using aluminium in wiring requires proper techniques
Re: Copper Pennies, was First PCB.... neutralizing the HCL
2004-05-19 by Richard Mustakos
Dave, Where have you been? Don t you know that we use copper plated zinc pennies? And that eating a copper penny is not considered a hazard, but the zinc
Re: First PCB.... neutralizing the HCL
2004-05-19 by Richard Mustakos
Adam, Thanks for the info on slaked lime. But go with the iron: aluminum may be better at getting the copper out, but when I asked a company that deals with
Got to learn Eagle
2004-05-19 by Steve
OK, I ve -got- to learn to use Eagle. I just spent days on a project. Drew the schematic with pencil and paper, plugged into protoboard. Spent more time
Re: First PCB.... neutralizing the HCL
2004-05-19 by Steve
... wrote: ... scrap ... copper ... not to ... days to ... etchant and ... Adam, would you post this in the Files section, in the Acid
Re: [Homebrew_PCBs] Re: First PCB.... neutralizing the HCL
2004-05-19 by Adam Seychell
... Yep, I ve used slaked lime a few times. its mostly calcium hydroxide Ca(OH)2. You get CaCl2 which is soluble. Builders lime is 1/1000th cost of bicarbonate
Re: Up for making a PCB? 5/18/04
2004-05-19 by Dave Mucha
... Why not just put it together on a breadboard ? $25 bux and you can make circuits in a few hours. http://www.jameco.com/cgi-bin/ncommerce3/ProductDisplay?
Re: [Homebrew_PCBs] Up for making a PCB? 5/18/04
2004-05-19 by mickeym
Looks like a wireless to IR relay. Questions: Is pin 8 of the PIC supposed to be connected to Vdd? What s with the feedback resistor on the shift register?
Up for making a PCB? 5/18/04
2004-05-19 by kaytea2k
Anyone up for making a simple PCB (layout & board) from a simple schematic over at http://sanisis.netfirms.com/. Also you can e:mail me about the prices, et
Re: [Homebrew_PCBs] toster oven solder
2004-05-18 by Stefan Trethan
On Tue, 18 May 2004 17:36:11 -0000, Dave Mucha ... ebay... you get the standard size syringe for much less... ST and don t forget to
toster oven solder
2004-05-18 by Dave Mucha
Hi all, I fillally got to the point where I have a TSSOP device, 208 pin and need to put it on a board. Since I don t want to hand solder, I m thinking toaster
Re: First PCB.... neutralizing the HCL
2004-05-18 by Dave Mucha
... matter of ... without ... Heck, if you just leave the stuff outside to evaporate, all you would have left is some salts and the residual copper. That would
Re: [Homebrew_PCBs] Re: First PCB.... neutralizing the HCL
2004-05-18 by Stefan Trethan
... you probably have no metallic copper, more like CuCl2 and CuCl.... the acid is definitely no problem, neutralize with anything... The H2O2 degrades to pure
Re: [Homebrew_PCBs] Re: First PCB....
2004-05-18 by Stefan Trethan
... I must have had the other kind then, a half-a-liter solution did just get hand-warm. ST
Re: First PCB.... neutralizing the HCL
2004-05-18 by Dave Mucha
... chemistry ... with ... wipe ... good ... put in ... chemistry ... need ... prevents a ... easy ... add a ... etchant ... the HCl ... I m no chemist, but
Re: First PCB....
2004-05-18 by Phil
... It ... Interesting. I didn t notice 2 forms being sold. Not that it matters much as I dont intend to use FeCl unless desperate and I ll get the pre-mixed
Re: [Homebrew_PCBs] Re: First PCB....
2004-05-18 by Stefan Trethan
On Tue, 18 May 2004 10:40:31 -0000, onenastyviper ... The chemistry is not really complicated, if you want to maintain a good etchant with least cost and no
Re: [Homebrew_PCBs] Re: First PCB....
2004-05-18 by Stefan Trethan
... Second that. Heat was never a problem while i used it. But it is very nasty stuff... ST
Re: First PCB....
2004-05-18 by leon_heller
... water ... The hydrated form doesn t generate very much heat or splash much. It should be added to the water rather than vice versa. The anhydrous form
Re: LaserJet 5P
2004-05-18 by leon_heller
... with ... upgraded ... I went ... fixed ... White ... run out, ... be less ... Tracing paper works very well, I buy it by the A4 size pad from the local
Re: First PCB....
2004-05-18 by onenastyviper
Maplins has the hexahydrate, I thought there was two types: hexahydrate and another anhydrous one? Don t ask me if there is a difference, I haven t studied any
Re: New to group and first attempt at PCB
2004-05-18 by teilhardo
Hi Guys, Thanks a lot for all of your helpful input, it really paid off. I finally got the eagle software working and printed out a beautiful pcb negative