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On 10/15/2016 01:51 PM, Robert Gasiorowski wrote:<br>
<blockquote
cite="mid:CAEU50hVSJoTbGibPMTLy3d4hdw_POt9jbAXb9MG6jsAAL+9EDg@mail.gmail.com"
type="cite">
<div dir="ltr">1% resistors are between $0.005 to $0.01, 0.1% are
10x-25x more. </div>
</blockquote>
In your dreams. Look up the price of, for example, 1210 size 1/2
watt resistors with values of 11 through 19 ohms. You'll find them
slightly higher cost. Like a few hundred times higher.<br>
<br>
You didn't read what I wrote. I said that because the required
values are NOT E96 they are much more expensive. <br>
<br>
Feel free to use octopart, but results for that search engine were
less than pitiful when I tried it just now. Here's what Digikey
offers for the 11-19 ohm values. Notice only a subset are available,
and for a single package size, a smaller subset.<br>
<br>
<a
href="http://www.digikey.com/product-search/en/resistors/chip-resistor-surface-mount/65769?k=resistor&k=&pkeyword=resistor&v=10&pv7=2&pv1=1080&pv1=1081&pv1=1083&pv1=1084&pv1=1085&pv1=1086&pv1=2370&pv1=1087&pv1=3655&pv3=1&pv2=5&FV=fff40001%2Cfff800e9&mnonly=0&newproducts=0&ColumnSort=0&page=1&stock=1&quantity=0&ptm=0&fid=0&pageSize=25">http://www.digikey.com/product-search/en/resistors/chip-resistor-surface-mount/65769?k=resistor&k=&pkeyword=resistor&v=10&pv7=2&pv1=1080&pv1=1081&pv1=1083&pv1=1084&pv1=1085&pv1=1086&pv1=2370&pv1=1087&pv1=3655&pv3=1&pv2=5&FV=fff40001%2Cfff800e9&mnonly=0&newproducts=0&ColumnSort=0&page=1&stock=1&quantity=0&ptm=0&fid=0&pageSize=25</a><br>
<br>
<br>
Mouser's offerings are not as good. <br>
<br>
Notice the few values Digikey and Mouser offer are automotive. I
guess something drives those guys to avoid standard E96.<br>
<br>
Again, I'm asking you *where* one would find these magically
inexpensive resistors in 1210 size with the 63 values required?<br>
<br>
Instead of wondering if it would take me an hour or more to "design"
a copy of a completely regular PCB like this, I'll point out that it
only changes one of the product terms: the other one is still
assumed to be zero.<br>
<br>
-Pete<br>
<br>
<br>
<blockquote
cite="mid:CAEU50hVSJoTbGibPMTLy3d4hdw_POt9jbAXb9MG6jsAAL+9EDg@mail.gmail.com"
type="cite">
<div dir="ltr">You don't need E96, those decades use 1R, 10R,
100R, 1K, 10K, 100K, and 1M values only (each *10)
<div>I can design board like that in less than an hour, just
need to know dimensions.</div>
<div>You can use through hole or SMD and I would not do them
myself, I would pay fab house to solder them, $0.04 per pad TH
and $0.03 per SMD.</div>
<div>Soldering headers would add $5.60 (without discount,) but
anyone could solder them at home.</div>
<div><br>
</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Sat, Oct 15, 2016 at 12:13 PM, <a
moz-do-not-send="true" href="mailto:pete@soper.us">pete@soper.us</a>
<span dir="ltr"><<a moz-do-not-send="true"
href="mailto:pete@soper.us" target="_blank">pete@soper.us</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div style="font-family:'Calibri','sans-serif'">
<div dir="ltr">Where are the 1% 1/2 watt resistors with
the required values for a few cents each? In my
experience stepping away from E96 values gets pricey,
assuming you can find a source at all. Then there's the
notion of the time to design the board, get it and a
stencil made, paste and pick and place the parts and
solder it, then add the barrier strip. So that's $0/hr
for labor and magical sources for parts. <span
class="HOEnZb"><font color="#888888">
<div dir="ltr"><br>
<div dir="ltr">Pete</div>
</div>
</font></span></div>
<div>
<div class="h5"><br>
<div id="m_179457805397417647htc_header">----- Reply
message -----<br>
From: "Robert Gasiorowski" <<a
moz-do-not-send="true"
href="mailto:rgresume@gmail.com" target="_blank">rgresume@gmail.com</a>><br>
To: "Pete Soper" <<a moz-do-not-send="true"
href="mailto:pete@soper.us" target="_blank">pete@soper.us</a>><br>
Cc: "Triangle Embedded Computing Discussion" <<a
moz-do-not-send="true"
href="mailto:TriEmbed@triembed.org"
target="_blank">TriEmbed@triembed.org</a>><br>
Subject: [TriEmbed] bad news about decade resistor
boards<br>
Date: Sat, Oct 15, 2016 9:31 AM</div>
</div>
</div>
</div>
<div class="HOEnZb">
<div class="h5"><br>
<div dir="ltr">It would probably cost less if you made
them yourself, and that's including assembly!
<div>You could make them custom size, so that they fit
the box of your choice.<br>
</div>
<div>You could also use higher precision resistors
(0.1% or better) for 1k, 10k, and 100k, to make your
decade box even better.</div>
<div>High precision resistors are expensive, but in
bulk might not be that bad.</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Sat, Oct 15, 2016 at 8:55
AM, Pete Soper via TriEmbed <span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:triembed@triembed.org"
target="_blank">triembed@triembed.org</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">Just
a few folks expressed interest in the decade board
a while back. I thought it might be more
interesting mounted on a laser-cut acrylic base
and I wasted some time exploring these and other
cute accessories. In the meantime the price was
jacked up to $14 +$3 shipping each. I searched
around and couldn't find the quantity five deal
Paul pointed us too either. I was going to just
get a bunch on spec and coordinate with Jeff to
offer them in return for Splatspace donations. But
at this price they're no longer interesting.
Here's the item in question:<br>
<br>
<a moz-do-not-send="true"
href="https://smile.amazon.com/Electronics-Salon-1R-9999999R-Programmable-Resistor/dp/B01CZLPAOM/ref=lp_8937979011_1_3?srs=8937979011&ie=UTF8&qid=1476535329&sr=8-3"
rel="noreferrer" target="_blank">https://smile.amazon.com/Elect<wbr>ronics-Salon-1R-9999999R-Progr<wbr>ammable-Resistor/dp/B01CZLPAOM<wbr>/ref=lp_8937979011_1_3?srs=893<wbr>7979011&ie=UTF8&qid=1476535329<wbr>&sr=8-3</a><br>
<br>
-Pete<br>
<br>
<br>
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href="http://TriEmbed.org" rel="noreferrer"
target="_blank">http://TriEmbed.org</a><br>
</blockquote>
</div>
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