Are the BOMs for the sensor boards?

[dzfranklin]

I couldn't find any sort of BOM for the sensor boards. Am I missing something, or is what specific component to use something I should figure out myself?

(I'm mainly interested in the hiking log board.)

[tahnok]

I don't believe there are BOMs, you'll have to look at the schematic and make your own (or maybe eagle can export one?)

…

On Fri, Nov 25, 2022, 17:34 Daniel Franklin ***@***.***> wrote: I couldn't find any sort of BOM for the sensor boards. Am I missing something, or is what specific component to use something I should figure out myself? (I'm mainly interested in the hiking log board.) — Reply to this email directly, view it on GitHub <#145>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AACYSEIZBMDRYRXDUG4XFS3WKE5GJANCNFSM6AAAAAASLVA4ZI> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[ghost]

Eagle can indeed export BOMs. For example, for the hiking log:

Partlist exported from C:/Users/jackb/Sensor-Watch/PCB/Sensor Boards/OSO-MISC-21-008 Hiking Log.sch at 27/11/2022 23:50

Part Value                 Device                Package                Description                                                                                    DESCRIPTION                                                              DIGI-KEY_PART_NUMBER DIGI-KEY_PURCHASE_URL                                                                                                                                     MF                 MP       PACKAGE                  
C1   10µF                  CAP_CERAMIC_0402MP    _0402MP                Ceramic Capacitors                                                                                                                                                                                                                                                                                                                                                                                          
C2   0.1uF                 CAP_CERAMIC_0402MP    _0402MP                Ceramic Capacitors                                                                                                                                                                                                                                                                                                                                                                                          
R1   1% 10K                RESISTOR_0402MP       _0402MP                Resistors                                                                                                                                                                                                                                                                                                                                                                                                   
RT1  NTC 10K               RESISTOR_0402MP       _0402MP                Resistors                                                                                                                                                                                                                                                                                                                                                                                                   
U$3  FH19C-9S-0.5SH_10-FFC FH19C-9S-0.5SH_10-FFC FH19C9S05SH10-FFC                                                                                                                                                                                                                                                                                                                                                                                                                  
U1   LIS2DHTR              LIS2DHTR              PQFN35P200X200X100-14N MEMS digital output motion sensor: ultra low-power high performance 3-axes femto accelerometer  Accelerometer X, Y, Z Axis ±2g, 4g, 8g, 16g 0.5Hz ~ 672Hz 14-LGA _2x2_  497-13795-1-ND       https://www.digikey.com/product-detail/en/stmicroelectronics/LIS2DHTR/497-13795-1-ND/4209308?utm_source=snapeda&utm_medium=aggregator&utm_campaign=symbol STMicroelectronics LIS2DHTR LGA-14 STMicroelectronics

note that FH19C-9S-0.5SH_10-FFC is not something you need as this is the watch-side connector for the sensor PCBs. so the only specific component you need is the LIS2DHTR, which you can google (or use the DigiKey link provided). the rest are fairly generic components, as long as you buy something fitting the specified package size, resistance/capacitance, etc.

[joeycastillo]

So FYI, I haven't tested all of the boards in that folder. The project kind of migrated from "thing I'm hacking on" to "product that people use" without me doing a pass to clean up a lot of sort of draft work. Case in point: I never actually tested the Hiking Log board, as the LIS2DH was way too fine-pitched for me to place consistently. Instead I've moved on to using the LIS2DW. That accelerometer does technically have a temperature sensor inside, tho I haven't written code to make use of it yet or gotten a sense for its accuracy.

There's a tested design called Sensor Watch Motion II in there (OSO-MISC-21-021), and the BOM for that is just the LIS2DW and two 0603 capacitors (10µF and 100nF).