[Cyborg] Fwd: [Noisebridge-discuss] Re: March Digikey Bulk Order

Lamont Lucas lamont at cluepon.com
Mon Mar 23 12:42:04 PDT 2009


Please add one more to the order for me, and I'll work with you on 
surface mounting the thing.  I have a hot-air rework station that will 
be useful for undoing whatever we mess up.  I've used a toaster oven for 
SMT reflow, but I'd like to do this with a regular hot-plate, as I think 
that method is superior.

We'll need to either order an adapter PCB for the PLLC-20 (aka LPCC-20), 
or make a custom one.  The board I have from sparkfun for the Honeywell 
HMC1052L is a 4 pin-per-side 16-pin-LLC.  I'm capable of designing and 
ordering the adapter board, but I wouldn't get a chance to do it till 
tuesday night at the earliest, and I'm out of town for a week starting 
friday.

This solderless socket might help with the prototyping: 
http://www.chiptool.net/adapter/plcc-1.htm

That 1052L chip, by the way, I spent the weekend trying to use.  Unlike 
the HMC5843, the HMC1052L requires a 400 mA pulse for 2 uS to clear out 
any lingering magnetic fields, which requires an h-bridge or at least a 
totem-configured pair of FETs.  I started wiring it up, but after I've 
added an h-bridge chip, 2 capacitors, two resistors etc, the resulting 
cost and bulk make me think that I should have just started with the $19 
5843, rather than "saving" via the $8.50 1052L.

That BUB board looks nice, although I'm still super happy with my FTDI 
cable, just for compactness's sake.

Adam Skory wrote:
> I want to order two of the HMC5843 3-axis compass chips in the hope
> that someone will help me figure out how to surface mount the damned
> things.
>
> ( http://parts.digikey.com/1/parts/1599656-sensor-magnetic-3-axis-20-lcc-hmc5843.html
> )
>
> Anyone else want some? It would be good to add them to today's digikey
> bulk order.
>
> Also, I'm looking at getting some RBBB kits and a couple USB BUB
> boards, separately from the digikey order, but it would good also to
> know how many of those we should get.
>
> ( http://moderndevice.com/RBBB_revB.shtml and
> http://www.moderndevice.com/connect.shtml )
>
> -Skory
>
>
> ---------- Forwarded message ----------
> From: miloh <froggytoad at gmail.com>
> Date: Mon, Mar 23, 2009 at 10:52 AM
> Subject: [Noisebridge-discuss] Re: March Digikey Bulk Order
> To: noisebridge-discuss at lists.noisebridge.net
>
>
> RE:  Digikey bulk order
>
> Correction:  didn't mean to suggest one needs to find dr_jesus on IRC,
> the directions for being included are posted on the wiki:
> https://www.noisebridge.net/wiki/Digikey_Bulk_Order
>
>
>
>
> On Mon, Mar 23, 2009 at 9:40 AM, miloh <froggytoad at gmail.com> wrote:
>   
>> Friendly reminder: the March Digikey is going out by the afternoon, contact dr_jesus in IRC to get in on the action.
>>
>> -rma
>>     
>
>
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>   



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