Embedded Electronics Classes/Kits for Ingenuity - Makers' Alliance

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Message from discussion Embedded Electronics Classes/Kits for Ingenuity
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Subject: Re: [makersalliance] Embedded Electronics Classes/Kits for Ingenuity
From: Sam Harmon <samuel.har...@gmail.com>
In-Reply-To: <72c6754e-972e-4ab6-9b93-0932df8559c9@googlegroups.com>
Date: Fri, 31 Aug 2012 12:40:19 -0400
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I did some number crunching, and I think we can make 100 work. It goes =
over the funding by a little bit, but we'll be taking donations and =
whatnot, so I think it'll be ok.

Now we just need to get the funding secured from Ingenuity=85

Sam

On Aug 31, 2012, at 11:11 AM, Joe Logan wrote:

> In quantity 50, your BOM cost is going to rise 20-25% since all this =
stuff is sourced from Digikey and Mouser. On the PCBs, you are looking =
at a minimum order or 100 sq inches. Assuming these guys are about .5 x =
2 in, it works out to be a $200 minimum order, 1 wk turn, with a net of =
100 PCBs.=20
>=20
> On Thursday, August 30, 2012 9:47:52 PM UTC-4, Joe Gorse wrote:
> Joe,
>=20
> How does changing the quantity to 50 affect the unit cost on the =
drawdio?
>=20
> I would like to do a combination of Drawdio, the learn to solder badge =
kit, and Diavolinos on a lanyard for the Ingenuity Maker/Hacker Badge. I =
think this allows for a decent amount of flexibility and hackability, =
though we may be a bit light on sensors and interface hardware yet.
>=20
> Cheers,
> Joe
>=20
> On Thu, Aug 30, 2012 at 10:18 AM, Joe Logan <jd...@case.edu> wrote:
> The drawdio is a tone generator that makes noises as the user draws on =
paper using a pencil. I have not built or used one before, but there are =
numerous videos up on youtube that provide a good demonstration of what =
it is and what it does. I am all for doing more complicated and original =
kits and projects, but I feel like the time limit until ingenuity fest =
means that we should really be looking for a low risk, proven project =
such as this.=20
>=20
> Benefits of the drawdio:
> -excellent instructions already available on the internet
> -open source schematic and PCB artwork in Eagle format
> -involves both audio (noise from speaker) and visual arts (drawing)
> -highly obnoxious=20
> -proven, low risk design
> -inexpensive BOM (few bucks each in volume)
> -easy to construct for soldering newbies (all thru hole components)
> -entertaining for adults/children/inebriated adults alike
>=20
> I put together a BOM with digikey and mouser part numbers, quantities, =
and estimated per-component prices assuming medium volume (~200), which =
is attached to this email. In order to purchase PCBs, someone will have =
to download the Eagle board file, install the free version of Eagle, and =
cut gerber files. I work with Malaysian PCB houses that can do either a =
1 or 2 week turn with 2-day delivery.=20
>=20
> An additional note - I forgot to include a AAA battery on the BOM.=20
>=20
> On Wednesday, August 29, 2012 3:29:02 PM UTC-4, Sam Harmon wrote:
> Ok, here is my "mostly readymade" submission of a plan for the =
Ingenuity kits:=20
>=20
> This plan gets us:=20
> A- a really quick & easy to put together thing that is cheap ($1.50 =
each in quantity, can sell for $2-$3, or just in exchange for a donation =
or something)=20
> B- An "Arduino Enough" thing that hopefully keeps us in the spirit and =
close enough to the letter of what we're supposed to be doing. If no one =
buys them, we'll have a bunch of extra Arduinos to do workshops and =
crazy stuff with in the future=85=20
> Also: If people really want a morse code blinky thing: =
http://brainwagon.org/2009/11/14/another-try-at-an-arduino-based-morse-bea=
con/ - which will blink the Diavolino's built-in LED.=20
> C- Some additional tools so people can put these together about a =
dozen at a time...=20
>=20
> Learn to Solder Skill Badge Kit=20
> http://www.makershed.com/Learn_to_Solder_Skill_Badge_Kit_p/mkls01.htm=20=

> 250 for $375 (+ $5 shipping), ships in 1-2 business days from =
California (time to receive  1 week-10 days?)=20
>=20
> TOTAL FROM MAKERSHED: $380=20
>=20
> EMSL Diavolino (w/6&8pin header set)=20
> http://evilmadscience.com/productsmenu/tinykitlist/180-diavolino=20
> 7...@12.50 w/headers & 3AA battery holder ($937.50)=20
>=20
> Adafruit FTDI Friend - Not really for us to sell, just so we can =
program the Diavolinos a few at a time, and maybe cope with one or two =
walking off...=20
> http://evilmadscience.com/productsmenu/accessories/210=20
> 10@$15 each ($150)=20
>=20
> TOTAL FROM EMSL=3D$1087.50 (Free Shipping over $75, time to receive 1 =
week-10 days?)=20
>=20
> Parts-Express=20
> Stahl Tools SSVT Soldering Station (we already have 6 of these =
already)=20
> http://www.parts-express.com/pe/showdetl.cfm?partnumber=3D374-100=20
> 6@$15.98  =3D $95.88=20
> 60/40 solder, 1 lb=20
> http://www.parts-express.com/pe/showdetl.cfm?partnumber=3D370-032=20
> 2@$23.49 =3D 46.98=20
> Tip cleaner=20
> http://www.parts-express.com/pe/showdetl.cfm?partnumber=3D341-223=20
> $8.48=20
> TOTAL FROM PARTS EXPRESS: $162.69  (7.5% Ohio sales tax, free =
shipping, total time to receive 1-2 business days)=20
>=20
> TOTAL COST: $1630.19, leaving us with about $170 for incidentals (AA =
batteries for the Diavolinos?, more tools? anything else?)=20
>=20
> That's my thought, anyway.=20
>=20
> Sam
>=20
> --=20
> =20
> =20
>=20
>=20
>=20
> --=20
> Joe Gorse
>=20
> C: 440-552-0730
> T: jhgorse
> FB: jhgiv
> G+: jhgorse
>=20
>=20
>=20
> --=20
> =20
> =20
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