2 - thinking more about a bluetooth TeleDongle variant. the basic idea is to
3 use a cc2540 soc to provide usb and/or bluetooth interfaces, and a cc1101
4 transceiver on one SPI port for our RF modes. Thus the code runs on the
5 bluetooth part unlike all our other designs.
7 swrr072 is a USB dongle design that shows use of a Johanson integrated balun
8 that's 0.68 at q100 with a pcb trace antenna on 2.4ghz .. pcb is 4 layers
9 and 1.616 x 0.632" .. looks like I could take the RF end of the design as is
10 for the 2.4gzh end. Maybe make the board wider to fit some hammond box?
12 using a Hammond 1591XXMTBU or 1591XXLTBU, could put the 2.4ghz antenna on
13 one of the long sides, and UHF SMA and USB+power switch on opposite small
14 sides? Can I find a suitable lipo to mount on the non-2.4ghz side?
17 http://cgi.ebay.com/3-7V-330mAh-lithium-battery-Polymer-Ipod-Mp3-GPS-/220713108705?pt=US_Batteries&hash=item336386c4e1
20 http://cgi.ebay.com/3-7V-765mAh-lithium-battery-Polymer-Ipod-Mp3-GPS-/220713108713?pt=US_Batteries&hash=item336386c4e9
23 http://cgi.ebay.com/LiPo-Lithium-Polymer-Battery-3-7V-450mAh-MP3-MP4-GPS-/300427570775?pt=US_Batteries&hash=item45f2e0ee57
25 52 x 34 x 4mm 600mAh *good choice?* $2.30 plus shipping
26 http://cgi.ebay.com/Lithium-Polymer-Battery-3-7V-600mAh-MP3-MP4-GPS-NAT-/290433981343?pt=US_Batteries&hash=item439f36db9f
29 - after much online discussion, the new plan is to use a cc1111 and a Rayson
30 BTM-182 bluetooth module .. the latter should be budgeted at about $15 each
31 in quantity 100 .. uses async serial, less dev effort, no regulatory issues
34 - Raysom BTM-182 peak current draw is 58mA, Roving Networks RN-42 peaks at 50mA
36 Raysom gave us a quote of $10 per delivered at q100
38 RovingNetworks replied to our quote request but we don't have a number yet
40 Rough estimate of cogs puts us at retail price of $150