MOTM

I downloaded the "edge detector" circuit that Tony All recommended, I
appreciate all of your help, and I'll get back to the list once I spend
some more time studying op-amp behavior.

Anyway, while trying to figure out what hardware I need to order from
Synthesis Technology, I had an idea.  Paul sells 19" rack rails that are
tapped (ie. they have threaded holes) in order to mount modules.  Are they
flat pieces of metal, or are they like angle iron -- shaped like corner
pieces for increased rigidity??

If they are flat, I had this idea.  Why not get longer pieces that hold
more than 10U??  If they were 14U I could get 40% more modules!!

If that sounds insane, allow me explain my studio setup.  I have three 12U
plain racks.  Two are identical four-sided pressboard boxes with rack rails
that are underneath a keyboard stand.  These are filled with gear.

The third is a 12-space open frame rack.  By "open frame" I mean that it
doesn't have wood sides.  It isn't a box.  The top is only held together by
the gear in it.  This rack had one free space.  Last night I sold my
SPV-355, today I put the MKS-80 up for sale, that will give me a total of
5U, which is what I need for motm.  I hate to see the MKS-80 and SPV-355
go, but I also don't have much of a choice.  This is also the last free
rack space I have without buying something like a QuikLok ZM18 (14U
vertical, 14U horizontal) that probably won't even fit in the room.

So, these 10U of modules might be the last 10U of modules I get for a
_very_ long time.  However, by placing 2U on each side, outside of the
frame, then I'll have room for two more modules.

The extra modules would stick out like wings, which shouldn't look bad
because they are 5U tall.   Has anyone done anything like this??   Are the
rack rails Paul sells custom made for Synthesis Technology, or can I buy
longer ones from somewhere??  I have a hacksaw and a die grinder :)  Can
regular rack screws fit through the mounting holes in the modules??  If
that is the case, then I can just use larger screws with regular rails.