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USBKEY carrier board - power issue   Message List  
Reply | Forward Message #352 of 360 |
Re: [RoboBricks2] Re: USBKEY carrier board - rev A

Hi,
The board is 4 in^2, so that is a straight $10 at BatchPCB prices.
Don't worry about mailing a check -- I'll catch up with you at the HBRC
meeting. I still have to complete some basic assembly notes for you anyway.

-dave

Wayne C. Gramlich wrote:
>
>
> Dave:
>
> I'm not going to make it to the Maker Faire, since my son
> wants to study for his three AP exams next week.
>
> When I look at all of the stuff I am trying to do, it
> is clear that working on the AT90USBKEY carrier board
> is not going to happen either this month or next for me.
>
> Please send me your address and the amount you are going
> to charge me for the board, and I'll mail you a check.
>
> If somebody is really anxious to get USB to RoboBricks2
> bus stuff going, I will gladly donate my rev. A board to
> the cause.
>
> -Wayne
>
> --- In RoboBricks2@yahoogroups.com
> <mailto:RoboBricks2%40yahoogroups.com>, Dave Curtis <dave@...> wrote:
> >
> > The AT90USBKEY carrier board arrived yesterday. I haven't
> > had a chance to do anything but open the envelope. I'll put
> > together a package of schematic and check plots and try to
> > scribble down a few notes -- if I can manage to get to it
> > today, maybe we can meet up at Maker Faire.
> > Otherwise early next week.
> [snippage]
>
>



Mon May 5, 2008 4:35 am

dave_n6nz
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Message #352 of 360 |
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I've been looking at the USB KEY carrier board idea again. I've got a basic design that I am happy with that breaks out a reasonable amount of I/O but is...
Dave Curtis
dave_n6nz
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Mar 29, 2008
1:07 am

... So far, so good. ... I would design the board so that it takes external battery at 6V+ and provides 5V for the RoboBricks2 bus. That way no surgery on the...
Wayne C. Gramlich
waynegramlich
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Mar 29, 2008
4:35 am

... My only quibble with that is that because of the diode and the fact that the LM340 is *not* an LDO regulator, if you drop below 7.0-7.1 input you are...
Dave Curtis
dave_n6nz
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Mar 29, 2008
5:42 am

Having slept on it, here is what I think makes the most sense: Four assembly options, the matrix being: Processor 3.3V v. 5.0V. CAN4Bots v. RoboBricks2. ...
Dave Curtis
dave_n6nz
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Mar 30, 2008
4:39 am

I'm at the checkplot/gerber review stage on a USBKEY breakout board as outlined below. My plan is to wrap up 3 or 4 other boards in the next 2 or 3 days and do...
Dave Curtis
dave_n6nz
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Mar 31, 2008
5:05 am

Dave: Could you sign me up for a Rev. A board? My goal is to be sure that there are 2 or 3 of these things lying around in the RoboBricks2 community. Getting...
Wayne C. Gramlich
waynegramlich
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Mar 31, 2008
6:42 pm

... Yes, will do. ... I'm just trying to set clear expectations. ... Yes, I'm doing a similar layering. Working bottom up: 1) CAN electrical and CAN framing...
Dave Curtis
dave_n6nz
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Mar 31, 2008
9:22 pm

Well, I've cleared the BatchPCB DRC-bot and ordered, so now we wait. ~3 weeks seems the norm. -dave...
Dave Curtis
dave_n6nz
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Apr 2, 2008
11:51 pm

The AT90USBKEY carrier board arrived yesterday. I haven't had a chance to do anything but open the envelope. I'll put together a package of schematic and...
Dave Curtis
dave_n6nz
Offline Send Email
May 2, 2008
4:17 pm

Dave: I'm not going to make it to the Maker Faire, since my son wants to study for his three AP exams next week. When I look at all of the stuff I am trying to...
Wayne C. Gramlich
waynegramlich
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May 4, 2008
8:05 pm

Hi, The board is 4 in^2, so that is a straight $10 at BatchPCB prices. Don't worry about mailing a check -- I'll catch up with you at the HBRC meeting. I...
Dave Curtis
dave_n6nz
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May 5, 2008
4:35 am

Dave: I forgot to order a USBKey with my last DigiKey order, so do not rush to document on my account. Please hit me up for the $10 at the next HBRC meeting. ...
Wayne C. Gramlich
waynegramlich
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May 10, 2008
7:52 pm

Dave: Sounds like a reasonable design to me. -Wayne...
Wayne C. Gramlich
waynegramlich
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Mar 31, 2008
7:09 pm
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