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From: Joerg on 12 Apr 2010 11:10
Hello Folks,

Got an inductor that someone has seriously underrated for saturation
current, the 176uH version of this one, footprint S2 (0.394" pad distance):

http://www.alfamag.com/PDF/InductorsChokes/Power%20Inductors%20&%20Chokes/SW_150kHz_Series.pdf

Found this one that we could probably cram on there and at 220uH/1A it's
already more than twice as sturdy:

http://www.yuden.co.jp/ut/product/pdf/enr1_e.pdf

Since the current peaks in the converter will be up to 1.5A it'll still
be a squeeze. Does anyone know an inductor series that fits the
footprint dimensions but has even more oomph? Can be taller, height is
not much of an issue. Shielded would be nice but we may not have a
choice here. The exact inductance doesn't matter either as long as it's
above 175uH.

Other question: Does anyone know whether it's possible to order at
places like Digikey using a clients credit card? Or fill in a Digikey
order with shipping address and all, send to client, and they just need
to add their payment info but not have to enter all the parts again?
That would make invoicing less cluttered.

--
Regards, Joerg

http://www.analogconsultants.com/

"gmail" domain blocked because of excessive spam.
Use another domain or send PM.
From: Muzaffer Kal on 12 Apr 2010 11:27
On Mon, 12 Apr 2010 08:10:56 -0700, Joerg <invalid(a)invalid.invalid>
wrote:

>Hello Folks,
>...
>
>Other question: Does anyone know whether it's possible to order at
>places like Digikey using a clients credit card? Or fill in a Digikey
>order with shipping address and all, send to client, and they just need
>to add their payment info but not have to enter all the parts again?
>That would make invoicing less cluttered.

After you enter the order at Digikey, you can get a pair of number
called "Web ID" and "Access ID" which allow you to access the order
again from anywhere on the web. You can email those numbers to your
client/purchaser and they can finalize the order. That's what I do.
You can also make billing and shipping addresses different and enter
any credit card number (you may have to know the 3 digit code in the
back but I am not sure.)
--
Muzaffer Kal

DSPIA INC.
ASIC/FPGA Design Services

http://www.dspia.com
From: Rich Webb on 12 Apr 2010 11:31
On Mon, 12 Apr 2010 08:10:56 -0700, Joerg <invalid(a)invalid.invalid>
wrote:

>Other question: Does anyone know whether it's possible to order at
>places like Digikey using a clients credit card?

Should be possible, providing they supply the necessary credentials
(card number, name, billing address, magic number) and the shipping
address is an authorized address (something they'll probably have to
handle with their credit card company).

> Or fill in a Digikey
>order with shipping address and all, send to client, and they just need
>to add their payment info but not have to enter all the parts again?
>That would make invoicing less cluttered.

Could also be done but it looks like you'd need to give them your
Digikey username and password in order for them to access the order.

--
Rich Webb Norfolk, VA
From: Spehro Pefhany on 12 Apr 2010 11:45
On Mon, 12 Apr 2010 08:10:56 -0700, Joerg <invalid(a)invalid.invalid>
wrote:

>
>Other question: Does anyone know whether it's possible to order at
>places like Digikey using a clients credit card? Or fill in a Digikey
>order with shipping address and all, send to client, and they just need
>to add their payment info but not have to enter all the parts again?
>That would make invoicing less cluttered.

Joerg:-

You can send them a csv file and get them to do this:

http://dkc3.digikey.com/RUD/US/OrderFileUpload.html

You can set up an uncommitted order and grab the stuff off the screen
with a bit of editing.

From: Tim Wescott on 12 Apr 2010 12:19
Joerg wrote:
> Hello Folks,
>
-- snip --

> Other question: Does anyone know whether it's possible to order at
> places like Digikey using a clients credit card? Or fill in a Digikey
> order with shipping address and all, send to client, and they just need
> to add their payment info but not have to enter all the parts again?
> That would make invoicing less cluttered.

It would indeed make invoicing less cluttered, but then it makes your
timetable dependent on your client's purchasing department. I wouldn't
do it unless I knew that I could monitor the status of the order and
rattle some bars with the client if it wasn't getting entered.

I'd have to trust the client's purchasing department, and even then I
can already see the finger-pointing contest when my work was late
because their purchasing department didn't get around to dealing with
the order.

Clearly this would work well if whoever holds the credit card on the
client's end is motivated, responsive, and responsible. So I'm not
saying "don't do it, it'll be a nightmare" -- but I am most certainly
saying "think about it, it _may well_ be a nightmare". Depends on the
client, and you, on how much you trust them to be speedy with ordering
vs. how much you trust them to be speedy with paying invoices, and on
how willing you are to bankroll their inventory.

--
Tim Wescott
Control system and signal processing consulting
www.wescottdesign.com
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