Originally Posted by stamandster
Homer, did you post your process for etching the boards already?
Walker, I ordered 4 kits
Just because it makes more sense with shipping.
I am using the laser printer method. There are hundereds of articles online. It basically goes like this:
Make layout and print on Laser printer in REVERSE. OR, print on ANY printer and then make copies on a laser copier with darkness set to HIGH.
The idea is to get as much toner on the paper as possible.
Use a green scrubby and alcohol to get the tarnish and oils from some copper clad.
Iron the design onto the board. The plastic toner will stick to the board. Soak the board and paper in water for a while to soften the paper and GENTLY wipe the paper from the board, leaving the layout still attached.
Then soak the board in etching solution until the copper is eaten away. The copper under the toner will remain, leaving traces. Then wipe the toner away with some acetone.
I then "Tin" the traces with a hot iron and some solder.
The etching solution I ended up using is 2 parts Hydrogen Peroxide and 1 part Muriactic Acid (swimming pool/hot tub supply store). The first board will etch in a couple of minutes!NOTE: this solution is VERY bad for the environment, since it now contains a lot of copper! Please don't pour this stuff down the drain!
I've read that it can be used over and over and if the etching isn't working you can just add more peroxide and acid. If you start getting too much you can let it evaporate. (outside, since the fumes are pretty nasty)
Google that stuff.
Last night I finish my first working board. I still need to tweak the process, but it worked out ok I think.
Another tip is to use the cheapest, thinnest, sales ad paper you can find. with a bit of gloss on it. This allows the toner to stick to the OUTSIDE of the paper, and yet it also allows the paper to be removed from the board easily.
It takes a bit of practice to get the print and the ironing done just right. But you can always clean the board with acetone and try again!