[OH Updates] SM boards

Bruce Perens bruce at perens.com
Wed Sep 21 07:58:56 PDT 2011


On 09/21/2011 07:14 AM, Andrew Stone wrote:
>  A few weeks ago I offered to run a surface mount workshop 
> (http://effluviaofascatteredmind.blogspot.com/2011/09/diy-surface-mount-workshop.html) 
> with a 16,24,28,32 QFN BOB (literally; the pins go straight to 
> DIP-style headers for breadboarding)
That's great. I've seen something like that from Schmartboard before. He 
uses double-thick solder mask to make hand soldering easier and has 
unfortunately patented that.

Be cognizant of the /value in your tutorial program./ This, rather than 
a board, is what people came for. Preserve what you can.

About the best Open Hardware teaching program I've seen is at MIT 
SeaPerch <http://www.seaperch.org/index>, it's a PVC pipe submarine 
which can be built in a day. They offer a building kit and a teacher's kit.

I was able to buy the parts easily from their BOM, and taught a class 
for teachers in Norway in which we built two of them. I attached an 
underwater TV camera to one and we drove it around the harbor in 
Lillesand, watching the view from a TV on the dock.

One surprising finding was that PVC pipe in the hardware store there 
cost 20 times what it did in the U.S. I ended up importing a box of pipe 
as luggage.
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