Homebrew PCBs

How important is the 1 amp? Do I have to limit it to 1 amp or will it
draw up to one amp?

My power supply will deliver about 20amps at 5 volt (recycled computer
PSU) so I am going to need to put a resistor in there it limit it.



> -----Original Message-----
> From: mpdickens [mailto:md30022@...] 
> Sent: Friday, November 14, 2003 6:07 PM
> To: Homebrew_PCBs@yahoogroups.com
> Subject: Re: [Homebrew_PCBs] Etchant regeneration by electroplating
> 
> 
> Well, the copper is electroplating out. Here is my
> setup:
>                     1 AMP
>                   (-)   (+) 
>                    |     | 
>                   /       \
>                  /         \
>                (-)         (+)
>                 |           |
>                 |           |
>             ---------------------  Top of fecl2
>                 |           |
>             ---------    ---------     
>             |  (-)  |    |  (+)  |
>             | iron  |    | iron  |
>             | plate |    | plate |
>             |cathode|    | anode |
>             ---------    ---------
> 
> I'm thinking that if I adjust the ph by adding a
> little hcl, the colloidal copper solids (The dirty
> white lumps in the bottom of the tank) will dissolve
> back into solution. I suspect this would make the
> process much more efficient and faster. I'm going to
> get some litmus paper and see what the ph of fresh,
> unused ferric chloride is and then adjust the used
> fecl3 to match it. 
> 
> Best regards
> 
> Marvin Dickens
> 
> =====
> Registered Linux User No. 80253
> If you use linux, get counted at: 
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