Monday, July 18, 2005

visual documentation

The procedure for etching a circuit board is roughly as follows:
-transfer your circuit design onto the board using any of the various means out there.
-dump the board into a tub of ferric chloride. This etches away the copper from the board that is *not* covered by the ink from your transfer.
-when fully etched, use Mystery Enclosed Cleaning Solution to wipe the ink off.
-neutralize the etch with cold water.

After the struggle with getting our design on the board free hand, we were ready to etch, using our newly purchased Pyrex pan as a tub for the ferric:



So we put in the board, agitated, stirred, waited, agitated, waited, waited...
After an hour or so (where the kit stated part should take us "twenty to thirty minutes", Ms S suggested we should head down to the Fleetwood Diner while we wait. One lovely greasy late breakfast later, we came back to find /some/ etching happening at the edges of the board, but certainly not a significant amount.
More agitating:

3 Comments:

Blogger apete said...

So are we going to see before and after photos of the circuit board. That would be sweet.

8:53 PM  
Blogger chrispy said...

good idea. i'll scan them in.

9:27 AM  
Blogger chrispy said...

Who are you?

No, I thought I told you guys about this. Sorry. Yes.

9:28 AM  

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