--- /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
--- /dev/null
+v 20201211 2
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+{
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+netname=v_usb
+}
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+{
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+1
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+csm84io.sch
+T 87700 40100 9 10 1 0 0 0 1
+http://altusmetrum.org/
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+vendor_part_number=MCP9700-E/TO-ND
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+{
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+device=LED
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+}
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+{
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+}
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+{
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+}
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+{
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+}
+C 72700 54000 1 0 0 resistor.sym
+{
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+T 73000 53900 5 10 1 1 180 0 1
+refdes=R12
+T 73500 53900 5 10 1 1 180 0 1
+value=1k
+T 72700 54000 5 10 0 0 90 0 1
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+}
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+{
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+T 73700 54600 5 10 0 0 0 0 1
+device=LED
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+}
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+value=On/Off
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+vendor_part_number=MMA7260QT-ND
+T 13300 -8600 8 10 0 1 0 0 1
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+vendor_part_number=MMA7260QT-ND
+T 13300 -8600 8 10 0 1 0 0 1
+vendor_part_number=MCP9700-E/TO-ND
+C 70500 59900 1 90 0 capacitor.sym
+{
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+device=CAPACITOR
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+}
+N 70300 60800 70300 60900 4
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+{
+T 59200 41300 5 10 0 0 0 6 1
+footprint=0-215079-4
+T 59200 41300 5 10 0 0 0 6 1
+loadstatus=noload
+T 59200 41300 5 10 0 0 0 6 1
+device=CONNECTOR
+T 58800 42900 5 10 1 1 0 6 1
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+T 59000 41100 5 10 1 1 0 6 1
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+}
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+N 59200 42200 60300 42200 4
+{
+T 60300 42300 5 10 1 1 0 6 1
+netname=reset_n
+}
+N 59800 45300 59200 45300 4
+{
+T 59300 45400 5 10 1 1 0 0 1
+netname=v_usb
+}
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+N 62900 50500 64200 50500 4
+{
+T 62900 50600 5 10 1 1 0 0 1
+netname=reset_n
+}
+C 59200 43300 1 0 1 USBmicroB.sym
+{
+T 58845 43695 5 10 0 1 0 6 1
+footprint=11071
+T 59200 43300 5 10 0 0 0 0 1
+device=CONNECTOR
+T 59200 43300 5 10 0 0 0 0 1
+value=USBmicroB
+T 58205 45700 5 10 1 1 0 6 1
+refdes=J5
+}
+N 64200 44900 61000 44900 4
+{
+T 63400 45000 5 10 1 1 0 0 1
+netname=usbdm
+}
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+{
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+netname=usbdp
+}
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+N 64100 50100 64200 50100 4
+N 59200 41800 60900 41800 4
+{
+T 59700 41900 5 10 1 1 0 0 1
+netname=swdio
+}
+N 59200 41400 61300 41400 4
+{
+T 59700 41500 5 10 1 1 0 0 1
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+}
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+{
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+symversion=0.1
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+}
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+{
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+device=CAPACITOR
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+}
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+{
+T 68600 52200 5 10 0 0 0 0 1
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+}
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+{
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+}
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+{
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+}
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+{
+T 60700 45200 5 10 0 0 0 6 1
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+}
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+ Copyright 2020 by Bdale Garbee <bdale@gag.com>
+Licensed under the TAPR Open Hardware License, http://www.tapr.org/OHL
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