Fabrication Workshop Followup.

First let me thank the group of people who came on sunday for the first crack at the fabrication and circuit board workshop. I realize that we spent a lot of time in eagle and not enough time actually doing the etch process. In the future I will probably do a separate workshop for eagle alone.

For this reason I will be available Sunday at TDIs workshop at 833 SE Main #125 for any of yesterdays participants who would like to go over the process of etching the board again and to get some hands on practice.

You are also welcome to come to the TechShop session on june 14th (before carpooling to the dorkbot event at about us).

I have also uploaded the folder with the Anderton superfuzz design files ( http://dorkbotpdx.org/files/fabclass.zip ) and the hobby design rules You should try to run the drc error check and you should notice that with the wider pads a few of the parts will need to be moved.

The 1458 can be replaced with any of the following low noise equivalents (the lt and ne parts are spendy).

* http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=296-1410-5-ND
* http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=LT1113CN8%23PBF-ND
* http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=OPA2134UA/2K5E4-ND
* http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=296-1812-5-ND

For those of you who missed the session because you were away there will be a second session at techshop in the afternoon before the evenings event at about us.

  1. I assume that you mean this upcoming Sunday, June 7th…about what time range will you be there?

  • I enjoyed the fab class and got a lot out of it. But clearly there was too much material to cover in the time available. Not having a lot of Eagle experience, I learned a lot but I suspect that others with more experience would have been happy to move through that part faster. A separate Eagle session really is the answer. As far as the next fab class, I think you need to start with a schematic ready to go in Eagle and just cover a few particular hints about getting schematics drawn effectively. Then you can spend more time on the board layout process and what it takes to get a good design which can be produced successfully (either at a fab or by hand). This is where I felt I got somewhat lost on Sunday. And of course, the whole etching process needed some more time as well (although with a bit of practice I think I could get that part down).

    I will likely try to drop in to the June 14th session for a bit to try to learn some more about board layout and etching.

    Thanks for the class. It was fun.


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