MOTM

((obscure '70s movie reference))

Well, it's 18F outside and raining ICE (not snow, ICE). By tomorrow, they are predicting 3 to 5
INCHES of SOLID ICE covering everything. No schools or business will be open until Thursday! So,
nothing will ship until the thaw.

Meanwhile, I'm captive here, kitting and soldering :)

Paul S.
brrrrrr

At least your at home!

I got "iced" in a lousy hotel in the upper part of North Carolina last
weekend. Yuck! Much rather get stuck at home!

Good chance to start catching up on MOTM kits, huh? Got nothing else to do
and nowhere to go now, huh?

Hope you got some firewood and hot chocolate!

Well, we (CT) have had nearly three feet of snow in the last two weeks, and it
rained ICE yesterday, so I sorta know what you're going through.  Even good ol'
Boris would have had a hard time with this weather. ;)

Keep warm by the iron!

George

----- Original Message -----
From: Paul Schreiber <synth1@...>
To: MOTM listserv <motm@yahoogroups.com>
Sent: Monday, February 24, 2003 11:44 PM
Subject: [motm] Ice Station Zebra


> ((obscure '70s movie reference))
>
> Well, it's 18F outside and raining ICE (not snow, ICE). By tomorrow, they are
predicting 3 to 5
> INCHES of SOLID ICE covering everything. No schools or business will be open
until Thursday! So,

> nothing will ship until the thaw.
>
> Meanwhile, I'm captive here, kitting and soldering :)
>
> Paul S.
> brrrrrr

Good thing you're not in Michigan! You'd still be expected to get your sorry
butt to work!
We have a thing on the west side of the state called 'lake effect'. Lake M
acts like a big heat sink as the storms move across it and really messes
with the weather! Last summer was warmer then normal so the lake stored up a
lot more energy and paid us back this winter with several thunder snow
storms (talk about weird) and tons of snow.

Have fun kitting!

-----Original Message-----
From: Paul Schreiber [mailto:synth1@...]
Sent: Monday, February 24, 2003 11:45 PM
To: MOTM listserv
Subject: [motm] Ice Station Zebra

((obscure '70s movie reference))

Well, it's 18F outside and raining ICE (not snow, ICE). By tomorrow, they
are predicting 3 to 5
INCHES of SOLID ICE covering everything. No schools or business will be open
until Thursday! So,
nothing will ship until the thaw.

Meanwhile, I'm captive here, kitting and soldering :)

Paul S.
brrrrrr





Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/

Wow, just this morning I was recalling cold mornings of my childhood when
I'd listen to the radio for school closure announcements, not because of
snow but because of freezing rain. Nasty stuff. This was in Oregon. Now I
live in Colorado, where it was -3F night before last.

--Adam

> ((obscure '70s movie reference))
> 
> Well, it's 18F outside and raining ICE (not snow, ICE). By tomorrow, they are
> predicting 3 to 5
> INCHES of SOLID ICE covering everything. No schools or business will be open
> until Thursday! So,
> nothing will ship until the thaw.
> 
> Meanwhile, I'm captive here, kitting and soldering :)
> 
> Paul S.
> brrrrrr

NKK MB2011SS1W01 (pushbutton)
with
NKK AT407C (cap)
with
NKK AT512CH (conical nut)

The buttons which Paul has specced for the '600 and
'650 are not "standard" for all other modules.  They
are really more for the more digital modules in the
line-up.

Moe has proposed a standard pushbutton (E-Switch
RP3502MA-RED at
http://www.hotrodmotm.com/parts_list.htm), and one
that many people have used for the DIY and conversion
projects.

While I personally like the E-Switch button, it does
not really fall into line with some of the other items
which are already standard for MOTM.

This is in the same series of switches (M and MB2000 
Series) which are already specced and standard for
MOTM.  When comparing, please note the Moe has
incorrectly listed for the SP switches.  The NKK part
numbers should begin with "M201".  The 0 and 1 just
got reversed.  Everything else is correct.

This switch is not made in SPST, so SPDT has been
selected.  You just do not connect part of the
circuit.  So it is an On-(On) switch which we will
have functioning as a Off-(On) switch.  The
parenthesis denote momentary function for those not
familiar with this nomenclature.

I have specified the Screw-on Cap (S), but that is up
for debate.  The cap specified also reflects this.

The bushings, ratings, materials and terminals are the
same as the other MOTM switches.

I have specified the larger of the two cap sizes in
red (the latter is also up for debate).  The number I
have listed does not include the cap.  I think most of
the parts supply houses supply this separately to help
better manage inventory.  AT407C is the large size cap
in red PBT.

The number of pushes you can safely get out of the
switch is at least 50,000.  But since we are putting a
realtively low voltage through the switch (compared to
what it is rated) at a much lower amperage, I estimate
this number to be closer to be well over 1,000,000.  

This button takes a 3/8" hole in the panel as with the
other switches and jacks.  Each switch comes with 2
hex nuts we all know and love and one (F-11 style)
lockwasher.

Finally, the third part specified is a conical nut. 
This helps add stability to the switch when being
pressed, helps prevent damage from being struck from
the side and helps prevent anything from being caught
under the bottom lip of the button itself.  And I
think it looks nicer.

There are other pushbuttons available from NKK.  The
problem is that most of them have smaller surface
areas to push on.  The only advantage to using another
pushbutton is the snappiness or speed of pressing and
depressing the button.  Additionally, this is a
momentary switch as opposed the a snap type. 
Comments???  Other possibilities are SCB Series (e.g.
SCB25S10D-3CA), SB Series (e.g. SB221NO with ATT414
cap) or MB2400 Series (e.g. MB2411S1W01-HC w/ AT512
(also AT 532, AT533 or AT501)).

Here is some info from the supply houses which carry
this series of pushbuttons:

Allied
http://www.alliedelec.com/catalog/catalogpages/2002/935.pdf
Switch Zone
http://us.switchzone.com/pdf/MB2000Bushing.pdf
Mouser
http://www.mouser.com/catalog/612/595.pdf

--Shemp

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I'm using a Switchcraft type 923 in my VC EG prototypes because I have 
some of them already.  The 903 is probably a better 'production' choice as 
Allied has those.  (I only order from Newark as a last resort--their 
prices stink. ;)

http://www.newark.com/product-details/text/CD120/4998.html

Crow
/**/

The proposed switch "sticks out" too far. The SB series is probably better (look at the Allied
PDF catalog page, left side about 1/2 way down). I haven't had a need for a pushbutton switch up
until now.

Paul S.

This is a very nice switch.  It has a nice selection of colored caps.  The
knurled-face nut would look attractive, however it wouldn't match other nuts.
There's one with a red plunger (instead of black), but I don't think Allied has
it. (SB4011NOHC)

One downer: it needs a metric 12mm hole (.472").

George
----- Original Message -----
From: Paul Schreiber <synth1@...>
To: <motm@yahoogroups.com>; Tentochi <tentochi2003@...>
Sent: Tuesday, February 25, 2003 5:38 PM
Subject: Re: [motm] New Pushbutton Proposal


> The proposed switch "sticks out" too far. The SB series is probably better
(look at the Allied
> PDF catalog page, left side about 1/2 way down). I haven't had a need for a
pushbutton switch up

> until now.
>
> Paul S.

Actually, now that I've given it more than two seconds of thought :) with the
added paint thickness, a 1/2 inch hole is probably perfect.

George
----- Original Message -----
From: <groovyshaman@...>
To: <motm@yahoogroups.com>; Tentochi <tentochi2003@...>; Paul Schreiber
<synth1@...>
Sent: Tuesday, February 25, 2003 6:14 PM
Subject: Re: [motm] New Pushbutton Proposal


> This is a very nice switch.  It has a nice selection of colored caps.  The
> knurled-face nut would look attractive, however it wouldn't match other nuts.
> There's one with a red plunger (instead of black), but I don't think Allied
has

> it. (SB4011NOHC)
>
> One downer: it needs a metric 12mm hole (.472").
>
> George
> ----- Original Message -----
> From: Paul Schreiber <synth1@...>
> To: <motm@yahoogroups.com>; Tentochi <tentochi2003@...>
> Sent: Tuesday, February 25, 2003 5:38 PM
> Subject: Re: [motm] New Pushbutton Proposal
>
>
> > The proposed switch "sticks out" too far. The SB series is probably better
> (look at the Allied
> > PDF catalog page, left side about 1/2 way down). I haven't had a need for a
> pushbutton switch up
> > until now.
> >
> > Paul S.
>
>
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>

It looks like all of the SB series pushbuttons are all
not grouped together.

This looks like the best current canidate to me:

     SB4011NOHC

This is a SPST Off-(On) button.  These also come with
2 hex nuts and 1 lockwasher.  The C denotes a red
plunger (black also available).  Pluger is made of
pholic resign.  The height from the threads is only
0.248".  Pre-travel is 0.031".  Over-travel is 0.057".
 And total travel of plunger is 0.088".

There is also a polyethylene slip-on cap that goes
over the plunger.  I really like this.  And it
increases the diameter of the plunger from 0.331" to
the cap diameter of 0.394".  The part number for the
red slip-on cap is AT422-2C.  It does increase the
hight from the threads to 0.346".

The Switch Zone listed lots of distributers for this
pushbutton.  Here is some of the NKK info on this:

     http://us.switchzone.com/pdf/SB40.pdf

--Shemp

> The proposed switch "sticks out" too far. The SB
> series is probably better (look at the Allied
> PDF catalog page, left side about 1/2 way down). I
> haven't had a need for a pushbutton switch up
> until now.


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I have the OD listed as 0.492" (12.5mm) for all
SB4011's.  I agree; a 1/2" hole would be perfect. 
This also happens to be the same hole diameter as
Moe's E-Switch pushbutton, so there should be an easy
swap-out if anyone would ever choose to do that.

I am not sure what the specced paint thickness is on
the surface.  Nor on the hole.  Paul?  Larry?

--Shemp

> Actually, now that I've given it more than two
> seconds of thought :) with the
> added paint thickness, a 1/2 inch hole is probably
> perfect.

> > One downer: it needs a metric 12mm hole (.472").


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