Activity

From 12/28/2009 to 01/26/2010

01/27/2010

11:37 pm Bug #1032: Part Change
http://mouser.com/ProductDetail/Atmel/AT45DB161D-SU/?qs=sGAEpiMZZMuJXIph4YZFJU7D9eQuNJm0pgTssCTreYg%3d
16Mbit flas...
Kevin Woo
11:28 pm Task #1036 (Invalid): Doublecheck SDRAM footprint
Went back to the BGA part because there was an error in that footprint Kevin Woo
09:30 pm Revision 0e7dce07 (scoutece): Changedthe 28-QFN footprint, the center pad is now 1mm smaller in b...
Kevin Woo
08:27 pm Revision 03e9c04a (scoutos): untarred prex
Brad Neuman
08:22 pm Revision d1d999a3 (scoutos): deleted test file
Brad Neuman
08:11 pm Revision 44c54fdd (scoutos): testing
Bradford Neuman
08:07 pm Revision 89baf240 (scoutos): test
Kevin Woo
07:50 pm Revision b291a555 (scoutece): Deleted the test
Kevin Woo
07:49 pm Revision 4ca13574 (scoutece): test
Kevin Woo
07:43 pm Revision f9b43048 (scoutece): Initial commit of the unfinished scout board and the current scout ...
Kevin Woo

01/25/2010

12:21 am Task #1047 (Fixed): Team Member Bios
Make a sample bio for team members to list on www.colonyscout.com
Should describe (in 3rd person) a brief bio of eac...
Dan Shope

01/23/2010

08:24 pm Task #1038 (Fixed): Modify Power supply
Kevin Woo

01/22/2010

06:42 pm Task #1046 (Fixed): Update BOM
Lots of parts have changed. Kevin Woo
05:26 pm Task #1045: Add a USB A port to the board on the host controller
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=AE10332-ND Kevin Woo
05:22 pm Task #1045 (Fixed): Add a USB A port to the board on the host controller
Kevin Woo
05:20 pm Bug #1035 (Fixed): Redo decoupling caps on ARM
Kevin Woo
02:38 am Bug #1035 (Fixed): Redo decoupling caps on ARM
Kevin Woo
05:07 pm Bug #1044: Choose a new rtc backup battery
Using 2 diode drops. Schottky and standard diode -> .3 + .7 in the worst case leads to 2V which is a little dangerous... Kevin Woo
04:30 pm Bug #1044: Choose a new rtc backup battery
Wikipedia says that the typical capacity is 25mAh with our current draw of 5uA. This leads to about 208 days of runni... Kevin Woo
04:18 pm Bug #1044: Choose a new rtc backup battery
http://www.allspectrum.com/store/product_info.php?cPath=76_156&products_id=576&osCsid=f6ab02f15e80a8597fbd2cce9064f1f... Kevin Woo
03:27 pm Bug #1044 (Fixed): Choose a new rtc backup battery
We need to run on 1.8V Kevin Woo
03:13 pm Task #1037: Put 50MHz oscillator on the ethernet phy chip
Using this chip: http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=478-4792-1-ND Kevin Woo
12:18 pm Task #1037: Put 50MHz oscillator on the ethernet phy chip
The datasheet is wrong, its actually a 50MHz chip as they say everywhere else. Confired with the application note Kevin Woo
03:06 am Task #1037 (Fixed): Put 50MHz oscillator on the ethernet phy chip
-http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=XC1433TR-ND- Kevin Woo
03:34 am Bug #1039 (Fixed): Tie oscsel to the RTC Battery
Kevin Woo
03:07 am Task #1038 (Fixed): Modify Power supply
* The ARM needs the voltages to be sequenced.
* Eliminated the 1.2V domain
Kevin Woo
02:39 am Task #1036 (Invalid): Doublecheck SDRAM footprint
The eagle part is mislabelled, just double check to make sure that using the "wrong" part is correct. Kevin Woo
02:37 am Bug #1032: Part Change
All above parts won't work, the pitch is too small. New parts:
ARM AT91SAM http://search.digikey.com/scripts/DkSea...
Kevin Woo
02:35 am Task #1033 (Fixed): Email OneStopAssembly
Assuming that they're actually advanced circuits, they can't do the small holes we needed. Kevin Woo

01/21/2010

12:27 am Bug #1032: Part Change
not using the ARM, awaiting results to decide what ARM to use. Flash may change. SDRAM should remain constant. Kevin Woo
08:14 pm Bug #1032 (Fixed): Part Change
-New ARM: http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=568-4529-ND-
-New SDRAM: http://search.di...
Kevin Woo
12:26 am Task #1030 (Fixed): GoldPhoenix Quote
about $40 / board for 4 Kevin Woo
12:26 am Task #1033: Email OneStopAssembly
sent, awaiting reply Kevin Woo
11:38 pm Task #1033 (Fixed): Email OneStopAssembly
Got a quote online, but only showed assembly cost
Email sales and ask for fab cost
http://onestopassembly.com/how...
Dan Shope

01/20/2010

05:14 pm Task #976 (Fixed): Scoutfly Connectors
Dan Shope
05:13 pm Task #1030 (Fixed): GoldPhoenix Quote
Get a quote for the board with specs using the NXP ARM9 Dan Shope

01/19/2010

02:31 pm Task #1023 (Fixed): Double check ARM Analog VDD supply voltage
Should be tied to 3.3V Kevin Woo
02:28 pm Bug #1022 (Fixed): Replace hex schmitt triggers with duals
Kevin Woo
02:16 pm Bug #1021 (Fixed): I2C Level shifter on the AVR I2C lines
Kevin Woo

01/18/2010

02:01 am Task #1023 (Fixed): Double check ARM Analog VDD supply voltage
There isn't one right now, check what it should be Kevin Woo
01:53 am Bug #1022 (Fixed): Replace hex schmitt triggers with duals
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=NL27WZ14DFT2GOSCT-ND
We're wasting space for the ...
Kevin Woo

01/17/2010

03:10 pm Bug #1021 (Fixed): I2C Level shifter on the AVR I2C lines
Accelerometer runs at 3.3V, also there are currently no pullup lines Kevin Woo

01/16/2010

04:02 pm Task #1018 (Fixed): Test motor backdrive
Test how much power the motors can generate when driven by hand when the robot is off Kevin Woo
04:02 pm Enhancement #1017 (Wontfix): Separate grounds
We should have analog, chassis, and digital ground planes to limit noise around the board Kevin Woo
04:01 pm Enhancement #1016 (Wontfix): ESD Protection
Add ESD protection on any exposed pins to the board Kevin Woo
04:00 pm Bug #988 (Fixed): Jumper on USB data line to ARM
jumpered on the OTG PHY power lines instead so that the chip just won't power on unless the jumper is in place Kevin Woo
02:47 pm Enhancement #1015 (Fixed): Resnets for LED arrays
Kevin Woo
11:31 pm Enhancement #1015 (Fixed): Resnets for LED arrays
for the debug LEDs put on 13 element resnets
2K for the base: http://search.digikey.com/scripts/DkSearch/dksus.dll...
Kevin Woo
12:22 am Bug #1013 (Fixed): Circuit simulate LEDs
updated resistor values and changed circuits for the leds accordingly Kevin Woo
10:55 pm Task #969 (Fixed): Look for smaller ethernet connector
Kevin Woo
10:00 pm Bug #983 (Fixed): Add micro a/b usb-otg connector
Used a different connector which is 100% smt. This one had tabs which I couldn't make in Eagle without hacks. Kevin Woo

01/15/2010

05:09 pm Task #969: Look for smaller ethernet connector
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=553-1482-ND
Smaller but no LEDs so we need to ad...
Kevin Woo
04:58 pm Bug #1005 (Fixed): Move pushbutton to ffc
Kevin Woo
04:58 pm Bug #1005: Move pushbutton to ffc
Incorrect name. We actually are placing the button on the board. Using the standard smt pushbutton Kevin Woo
12:37 am Bug #1005 (Fixed): Move pushbutton to ffc
It shouldn't have its own header Kevin Woo
04:56 pm Bug #1013 (Fixed): Circuit simulate LEDs
Make sure that we don't need resistors on the base and not blow the ARMs current limit Kevin Woo
04:55 pm Bug #1004 (Fixed): Split power into input and output connectors
Made two separate RA .1" headers. Broke everything up Kevin Woo
12:35 am Bug #1004 (Fixed): Split power into input and output connectors
Put battery and charging on its own 4pin connector and 5v/3.3v/unreg/gnd/motors on a separate connector. Both 0.1" cg... Kevin Woo
04:35 pm Enhancement #1003 (Fixed): Replace giant DPAK BJTs with a smaller one
Used dual npn in a SOT223-8 package Kevin Woo
12:34 am Enhancement #1003 (Fixed): Replace giant DPAK BJTs with a smaller one
Older DPAKs for current limiting the motors may have been oversized. These should be ok: http://search.digikey.com/sc... Kevin Woo
12:32 am Bug #988: Jumper on USB data line to ARM
might be easier to do it on the power lines instead Kevin Woo
12:32 am Bug #983: Add micro a/b usb-otg connector
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=WM17143CT-ND Kevin Woo

01/14/2010

12:58 pm Task #999 (Fixed): Colony III Members
Define systems that need worked on
- Charging
- AVR (inputs, outputs)
Dan Shope
02:42 am Bug #992 (Fixed): Pin out rest of AVR ADC
Kevin Woo
09:37 pm Bug #992 (Fixed): Pin out rest of AVR ADC
Rich Hong
02:42 am Bug #984 (Fixed): Add ffc connectors to the board to replace cgrids
Kevin Woo
08:07 pm Bug #984 (Fixed): Add ffc connectors to the board to replace cgrids
Kevin Woo
12:59 am Bug #989 (Fixed): Test point on 2 test clocks on ARM
Kevin Woo
09:24 pm Bug #989 (Fixed): Test point on 2 test clocks on ARM
Rich Hong
12:54 am Task #987 (Fixed): Jumper on Power Kill Line
Kevin Woo
08:57 pm Task #987 (Fixed): Jumper on Power Kill Line
Jumper between power kill and AVR Dan Shope
12:53 am Bug #991 (Fixed): Remove AVR reset and replace with IO from ARM
Kevin Woo
09:36 pm Bug #991 (Fixed): Remove AVR reset and replace with IO from ARM
Rich Hong
12:49 am Bug #995 (Fixed): Put wireless amp enable lines on ARM
Kevin Woo
09:45 pm Bug #995 (Fixed): Put wireless amp enable lines on ARM
PAEN to EN and send it to the ARM Rich Hong
12:48 am Bug #994 (Fixed): Hook up Gyro PD and ST through level shifter to AVR
Kevin Woo
09:41 pm Bug #994 (Fixed): Hook up Gyro PD and ST through level shifter to AVR
Rich Hong
09:51 pm Task #997 (Wontfix): Spec out microphone
Rich Hong
09:40 pm Task #993 (Assigned): Look into accelerometer speed
http://www.sparkfun.com/datasheets/Sensors/Accelerometer/ADXL345.pdf Rich Hong
09:32 pm Bug #990 (Invalid): TVS diode on motors
Rich Hong
09:23 pm Bug #988 (Fixed): Jumper on USB data line to ARM
Rich Hong
08:50 pm Task #986 (Fixed): Charging Station Fuse
Opted to put a fuse in the charging station/system instead of the Scout. Dan Shope
08:25 pm Bug #981 (Fixed): Modify accessory ports
Kevin Woo
07:48 pm Bug #981 (Fixed): Modify accessory ports
Add 1 ADC, remove second accessory port. Kevin Woo
08:24 pm Bug #982 (Fixed): Add UART for the BOM
Kevin Woo
07:51 pm Bug #982 (Fixed): Add UART for the BOM
Kevin Woo
08:22 pm Bug #985 (Fixed): Add RX/TX UART pin bypass to the AVR for debugging
Kevin Woo
08:20 pm Bug #985 (Fixed): Add RX/TX UART pin bypass to the AVR for debugging
Kevin Woo
08:15 pm Task #968 (Fixed): Double-check Resistor Divider Values
Fixed a reverse divider on the LDO Kevin Woo
07:58 pm Bug #983 (Fixed): Add micro a/b usb-otg connector
Kevin Woo

01/13/2010

12:24 am Task #967 (Fixed): Double-check IC Footprints
Kevin Woo
09:34 pm Enhancement #972 (Fixed): Replace RF chip crystal with smaller oscillator
Kevin Woo

01/12/2010

05:04 pm Task #978 (Assigned): System Wiring
Formalize lengths, gauges, and organization of wiring for sensors and actuators. Signals should be transferred on the... Dan Shope
05:01 pm Task #976: Scoutfly Connectors
This looks like a good, fairly low cost solution. Routing power/gnd separately is no problem. Dan Shope
02:09 pm Task #976: Scoutfly Connectors
There are a lack of 40pin FFC connectors, the common sizes seem to be <= 30 pins. We can do 2 20-pin connectors to me... Kevin Woo
11:42 am Task #976 (Fixed): Scoutfly Connectors
Find 40+pin FFC (flexible flat cable) connector and cable (4+" length)
Find as inexpensive as possible (<$5 ideal)
Dan Shope
11:59 am Task #974: Accessory Ball Bearing
Use bushing instead of bearing (overkill)
Low profile (3/8" thickness) flange not necessary, but is good if we hav...
Dan Shope
05:32 am Task #974 (Fixed): Accessory Ball Bearing
Add block for ball bearing and choose part
Recommend 0.250" ID, plain vanilla ball bearing (read: cheap) or use simp...
Dan Shope
05:34 am Task #973 (Fixed): Share schematic + board on dropbox with dan
Dan Shope
07:30 pm Task #973 (Fixed): Share schematic + board on dropbox with dan
Kevin Woo
05:34 am Task #975 (Wontfix): Hood Buttons
Once dev board layout is finalized (for dev), design buttons and determine placement on hood piece.
Buttons may be...
Dan Shope
08:32 pm Enhancement #971 (Fixed): Remove led bar and use individual LEDs instead
Kevin Woo

01/11/2010

10:57 pm Enhancement #972 (Fixed): Replace RF chip crystal with smaller oscillator
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=535-10013-1-ND
is 100 x 100 mils
Kevin Woo
10:55 pm Enhancement #971 (Fixed): Remove led bar and use individual LEDs instead
* red, green, same as the FTDI's
* Add 1 more of each so that we can fully utilize those pnps
Kevin Woo
10:55 pm Task #970 (Fixed): Find all resistors we need
0603 unless it can't withstand the power disspation Kevin Woo

01/10/2010

04:06 pm Task #969 (Fixed): Look for smaller ethernet connector
Current one takes up a significant amount of room on the board Kevin Woo
03:59 pm Task #968 (Fixed): Double-check Resistor Divider Values
Some may be reversed Kevin Woo
03:59 pm Task #967 (Fixed): Double-check IC Footprints
Some may be reversed Kevin Woo
 

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