+++ /dev/null
-2010.12.25
-- thinking more about a bluetooth TeleDongle variant. the basic idea is to
- use a cc2540 soc to provide usb and/or bluetooth interfaces, and a cc1101
- transceiver on one SPI port for our RF modes. Thus the code runs on the
- bluetooth part unlike all our other designs.
-
- swrr072 is a USB dongle design that shows use of a Johanson integrated balun
- that's 0.68 at q100 with a pcb trace antenna on 2.4ghz .. pcb is 4 layers
- and 1.616 x 0.632" .. looks like I could take the RF end of the design as is
- for the 2.4gzh end. Maybe make the board wider to fit some hammond box?
-
- using a Hammond 1591XXMTBU or 1591XXLTBU, could put the 2.4ghz antenna on
- one of the long sides, and UHF SMA and USB+power switch on opposite small
- sides? Can I find a suitable lipo to mount on the non-2.4ghz side?
-
- 38 x 27 x 3mm 330mAh
- http://cgi.ebay.com/3-7V-330mAh-lithium-battery-Polymer-Ipod-Mp3-GPS-/220713108705?pt=US_Batteries&hash=item336386c4e1
-
- 62 x 35 x 3mm 765mAh
- http://cgi.ebay.com/3-7V-765mAh-lithium-battery-Polymer-Ipod-Mp3-GPS-/220713108713?pt=US_Batteries&hash=item336386c4e9
-
- 43 x 30 x 4mm 450mAh
- http://cgi.ebay.com/LiPo-Lithium-Polymer-Battery-3-7V-450mAh-MP3-MP4-GPS-/300427570775?pt=US_Batteries&hash=item45f2e0ee57
-
- 52 x 34 x 4mm 600mAh *good choice?* $2.30 plus shipping
- http://cgi.ebay.com/Lithium-Polymer-Battery-3-7V-600mAh-MP3-MP4-GPS-NAT-/290433981343?pt=US_Batteries&hash=item439f36db9f
-
-2010.12.30
-- after much online discussion, the new plan is to use a cc1111 and a Rayson
- BTM-182 bluetooth module .. the latter should be budgeted at about $15 each
- in quantity 100 .. uses async serial, less dev effort, no regulatory issues
-
-2011.03.31
-- Raysom BTM-182 peak current draw is 58mA, Roving Networks RN-42 peaks at 50mA
-
- Raysom gave us a quote of $10 per delivered at q100
-
- RovingNetworks replied to our quote request but we don't have a number yet
-
- Rough estimate of cogs puts us at retail price of $150
-
-2011.04.13
-- Pondering how much to clip off the SMA end of the PCB to ensure the SMA
- flange fits inside the box.
-
- Our connector needs 3.81 mm "above" the PCB which for TeleBT actually
- means between the PCB bottom surface and the base of the box. The box
- boss height is specified as 4mm, so that fits in a purely vertical sense,
- but I'm worried about the box wall to base radius, and the fact that the
- box walls aren't exactly vertical.
-
- Hammond doesn't specify the radius between the wall and base of the 1551K
- box. Given other things they do specify, it might be that 1 mm is a
- conservative guess. The specification for the inside dimensions of the lip
- around the lid is 10 mils smaller than the max PCB dimensions, and it *looks*
- like that inside edge might be about where the wall radius ends. The drawing
- shows the lid inside as 6.73mm less than box outside dimension, which seems
- reasonably consistent with my estimate of a 2mm wall thickness, about 1mm
- for the lid lip, and some mold tolerances. So, let's use the box lid lip
- inside dimensions as a proxy for the box base inside dimensions until proven
- otherwise.
-
- So we need to peel 5 mils off to account for the box radius. The flange
- itself is 40 mils. And I'm nervous about the guesstimates so I'll add
- another 5 mils of margin. So we need to take 50 mils off the SMA end of
- the PCB.
-
- As a sanity check, on TeleDongle the closes screw hole is 78 mils from the
- SMA edge of the PCB, which is 50 mils less than a maximum-size PCB would
- have. If anything, the TeleDongle SMA ends up inside the wall a bit more
- that necessary, such that tightening the SMA nut deflects the wall inward.
- So, 50 mils might indeed be a good choice for TeleBT. We'll give it a try!
-
-2011.06.07
-- as I start to work on rotating the design, noting the changes between the
- max 1551 board outline and what I used for v0.1:
-
- outline layer:
-
- - Line[278543 24606 291339 24606 1000 2000 "lock"]
- - Line[291339 24606 291339 129921 1000 2000 "lock"]
- - Line[287402 133854 24606 133854 1000 2000 "lock"]
- - Arc[287402 129921 3937 3937 1000 2000 90 90 "lock"]
- + Line[278543 24606 286338 24606 1000 2000 "lock"]
- + Line[286338 133854 24606 133854 1000 2000 "lock"]
- + Line[286338 24606 286338 133854 1000 2000 "lock"]
-
- similar changes on the top layer:
-
- - Line[287402 133854 24606 133854 100 2000 "clearline,lock"]
- - Line[24606 133854 24606 121063 100 2000 "clearline,lock"]
- - Line[12795 109252 0 109252 100 2000 "clearline,lock"]
- - Line[3927 0 266732 0 100 2000 "clearline,lock"]
- - Line[291339 24606 291339 129921 100 2000 "clearline,lock"]
- - Line[278543 24606 291339 24606 100 2000 "clearline,lock"]
- - Line[266732 0 266732 12795 100 2000 "clearline,lock"]
- - Line[0 109252 0 3937 100 2000 "clearline,lock"]
- - Arc[3937 3937 3937 3937 100 2000 270 90 "clearline,lock"]
- - Arc[278543 12795 11811 11811 100 2000 0 90 "clearline,lock"]
- - Arc[287402 129921 3937 3937 100 2000 90 90 "clearline,lock"]
- - Arc[12795 121063 11811 11811 100 2000 180 90 "clearline,lock"]
- + Line[286338 24606 286338 133854 600 2000 "clearline,lock"]
- + Line[286338 133854 24606 133854 600 2000 "clearline,lock"]
- + Line[24606 133854 24606 121063 600 2000 "clearline,lock"]
- + Line[12795 109252 0 109252 600 2000 "clearline,lock"]
- + Line[3927 0 266732 0 600 2000 "clearline,lock"]
- + Line[278543 24606 286338 24606 600 2000 "clearline,lock"]
- + Line[266732 0 266732 12795 600 2000 "clearline,lock"]
- + Line[0 109252 0 3937 600 2000 "clearline,lock"]
- + Arc[3937 3937 3937 3937 600 2000 270 90 "clearline,lock"]
- + Arc[278543 12795 11811 11811 600 2000 0 90 "clearline,lock"]
- + Arc[12795 121063 11811 11811 600 2000 180 90 "clearline,lock"]
-
-2013.01.25
-- reviewing design with an eye towards moving to production
-
- - we have the ability to sample v_lipo, but is it useful?
-
-- need to move design to current preferred parts list
-- verify button fits cleanly through box wall
-- artwork is solid .. did a lot for v0.3
-
-2013.04.08
-- problems in v1.0 build fixed for v1.1
- + companion and debug connectors should be rotated so cable dresses
- towards center of board like TD
- + update D1 footprint to clearly indicate cathode end so we don't
- mess that up again
- + we're not loading the flash part, so just remove it
-
-2016.03.20
-- to build a TeleBT with BTle:
- + swap out Rayson module for DK BM70BLES1FC2-0002AA-ND
- ? swap out CPU for STM32F042, since it has in-built USB bootloader
projects / hw / csm84io / commitdiff