[Cyborg] Fwd: [Noisebridge-discuss] Re: March Digikey Bulk Order
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
This solderless socket might help with the prototyping:
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
> ( 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 )
> ---------- 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:
> 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.
> Noisebridge-discuss mailing list
> Noisebridge-discuss at lists.noisebridge.net
> Cyborg mailing list
> Cyborg at lists.noisebridge.net
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