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bom.txt
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bom.txt
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## Bill of Materials
Desc: 4.5"^2 Circuit Board
Count: 1
Cost@1x: USD$21.25
Cost@25x: USD$5.00
Cost@Mass: USD$0.54
Source: http://www.goldphoenixpcb.biz/
Source: http://batchpcb.com/
Desc: ATtiny25-10S (EIAJ, "Wide" SOIC)
PartNames: IC1
Count: 1
Cost@1x: USD$1.80
Cost@25x: USD$1.10
Cost@Mass: USD$1.08
Source: http://www.mouser.com/Search/Refine.aspx?Keyword=ATTINY25-10S
Source: http://search.digikey.com/scripts/DkSearch/dksus.dll?keywords=ATtiny25-10S
AltParts: ATtiny25V-10S
Desc: 0805 or 0603 1µF Capacitor X7R
PartNames: C1, C2
Count: 2
Cost@1x: USD$0.27 (PN C2012X7R1A105K)
Cost@25x: USD$0.09 (PN CC0805KKX7R7BB105)
Cost@Mass: USD$0.016 (PN CC0805KKX7R7BB105)
Source: http://search.digikey.com/scripts/DkSearch/dksus.dll?keywords=CC0805KKX7R7BB105
Desc: 0805 or 0603 470kΩ Resistor
PartNames: R1, R2
Count: 2
Cost@1x: USD$0.02 (PN ERJ-3GEYJ474V)
Cost@25x: USD$0.02 (PN ERJ-3GEYJ474V)
Cost@Mass: USD$0.00131 (PN RC0603JR-07470KL)
Source: http://search.digikey.com/scripts/DkSearch/dksus.dll?keywords=RC0603JR-07470KL
Desc: 0.1" 6-Position Polarized Shrouded Header
PartNames: J1
Count: 1
Cost@1x: USD$1.56 (PN 102617-1)
Cost@25x: USD$1.40 (PN 102617-1)
Cost@Mass: USD$1.07 (PN 102617-1)
Source: http://search.digikey.com/scripts/DkSearch/dksus.dll?keywords=A26757-ND
** FUNCTIONALLY-OPTIONAL-PART
** The following part is needed for legal reasons, due to USPAT#6,108,751.
** It may be possible to negotiate a simple licence agreement with
** Maxim that could avoid adding this extra part, for a per-device
** license fee, but this remains to be seen.
Desc: DS2401X1 Silicon Serial Number (Flip-Chip)
PartNames: IC2
Count: 1
Cost@1x: USD$1.40
Cost@25x: USD$0.97
Cost@Mass: USD$0.59
Source: http://search.digikey.com/scripts/DkSearch/dksus.dll?keywords=DS2401X1
Source: http://www.mouser.com/Search/Refine.aspx?Keyword=DS2401X1
## Approximate Unit Part Cost Breakdown
Unit Cost @1x: USD$24.99 ~USD$124.95 for 5 Units
w/DS2401X1: USD$26.39 ~USD$131.95 for 5 Units
Unit Cost @25x: USD$7.70 ~USD$192.50 for 25 Units
w/DS2401X1: USD$8.67 ~USD$216.75 for 25 Units
Unit Cost @Mass: USD$2.82 ~USD$11,280.00 for ~4,000 Units
w/DS2401X1: USD$3.41 ~USD$13,640.00 for ~4,000 Units
## Parts for Mating Connector
Additionally, you may want some connectors to plug into that shrouded header:
Solder-socket plug:
http://search.digikey.com/scripts/DkSearch/dksus.dll?keywords=A33380-ND
Board-mount:
http://search.digikey.com/scripts/DkSearch/dksus.dll?keywords=A32934-ND
Housing:
http://search.digikey.com/scripts/DkSearch/dksus.dll?keywords=A25848-ND
http://search.digikey.com/scripts/DkSearch/dksus.dll?keywords=A25849-ND
Crimp-pins for housing:
http://search.digikey.com/scripts/DkSearch/dksus.dll?keywords=A25959
## Additional Finishing Materials
* Plasti-Dip, to water-deal the sensing section. <http://www.plastidip.com/>
* Epoxy or Silicone, for potting the electronics above the sensing section.
## Patent References
USPAT#5,210,846
USPAT#6,108,751
http://patimg1.uspto.gov/.piw?Docid=05210846&idkey=NONE
http://patimg1.uspto.gov/.piw?Docid=06108751&idkey=NONE
http://www.buoy.com/pipermail/1-wire-software-development/2004-November/000163.html
http://dics.voicecontrol.ro/process_mails/arata_discutia/129197/Implementing_1-wire_slaves.html