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USBKEY carrier board - power issue   Message List  
Reply | Forward Message #353 of 360 |
Re: USBKEY carrier board - rev A

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.
I'll pay in cash rather than check.

-Wayne

--- In RoboBricks2@yahoogroups.com, Dave Curtis <dave@...> wrote:
>
> 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.
Sat May 10, 2008 7:52 pm

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waynegramlich
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Forward 		Message #353 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
Offline Send Email 		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
Offline Send Email 		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
Offline Send Email 		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
Offline Send Email 		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
Offline Send Email 		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
Offline Send Email 		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
Offline Send Email 		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
Offline Send Email 		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
Offline Send Email 		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
Offline Send Email 		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
Offline Send Email 		May 10, 2008
7:52 pm

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