xtech/hw-openmower-utilsOpenMower V1 Mainboard 0.9.x up to 0.10.x requires an external plugged in IMU into J20. Unfortunately you don't get a non-faked MPU9250 anymore, so the only alternative you had, is the (non-cheap) WT901 for which you…
Hw openmower utils v1-arduino uno um9x is an open-source printed circuit board by xtech, from the xtech/hw-openmower-utils repository on GitHub. It is a 2-layer board of 68.6 × 53.3 mm with 19 parts on 34 nets, routed with 38 tracks and 116 vias.
Its parts include 2 connectors and 1 IC. It belongs with the AVR (ATmega, ATtiny) boards of this library.
OpenMower V1 Mainboard 0.9.x up to 0.10.x requires an external plugged in IMU into J20.
Unfortunately you don't get a non-faked MPU9250 anymore, so the only alternative you had, is the (non-cheap) WT901 for which you also need to solder an adapter (if you don't wanna block your sound option).
That's why I designed this alternative.
I used and tested this only on an OpenMower (V1) 0.9.x Mainboard, but it should be compatible also for 0.9.x up to 0.13.x Mainboard variants. So you should be also able to use it for the case that you've a damaged or malfunction mainboard-assembled IMU (if you disable/remove the assembled one before).
Plug into J20 (take attention to Pin-1 direction) and install Firmware with "_LSM6DSO" suffix (for 0.9.x up to 0.11.x). As of 0.12.x LSM6DSO is compiled in by default.
Due to the LGA package of LSM6DSx, PCBA production is relatively expensive in special for lower number of pieces (<20).
Please contact me at joerg at ebeling dot ws, I've probably some tested prototypes with an assembled LSM6DSO left for sell.
If you're good in Hot-Plate soldering, I also have some prototypes without assembled LSM6DSO...
| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | MountingHole | TestPoint:TestPoint_THTPad_D2.0mm_Drill1.0mm | H8, H9, H10, H11, H12, H13, H14, H15 |
| 4 | MountingHole_Pad | MountingHole:MountingHole_3.2mm_M3_DIN965_Pad_TopBottom | H1, H2, H3, H4 |
| 3 | IPX cable hole | MountingHole:MountingHole_3.2mm_M3 | H5, H6, H7 |
| 1 | Arduino_Uno_R3_Shield | Library:Arduino_Uno_R3_OpenMower_Shield | A1 |
| 1 | Conn_01x05_Pin | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical | J2 |
| 1 | Conn_02x06_Top_Bottom | Library:PinSocket_2x06_P2.54mm_Horizontal_Top_Bottom | J1 |
| 1 | UM9x_module | Library:UM9x_module | U1 |
xtech/hw-openmower-utils
OpenMower V1 Mainboard 0.9.x up to 0.10.x requires an external plugged in IMU into J20. Unfortunately you don't get a non-faked MPU9250 anymore, so the only alternative you had, is the (non-cheap) WT901 for which you…
xtech/hw-openmower-utils
OpenMower V1 Mainboard 0.9.x up to 0.10.x requires an external plugged in IMU into J20. Unfortunately you don't get a non-faked MPU9250 anymore, so the only alternative you had, is the (non-cheap) WT901 for which you…
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It measures 68.6 × 53.3 mm and has 2 copper layers, 1.59 mm thick.
19 parts. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
From the xtech/hw-openmower-utils repository on GitHub, at the commit this page was made from: the board is hw-openmower-utils-v1-arduino-uno-um9x/hw-openmower-utils-v1-arduino-uno-um9x.kicad_pcb and its schematic hw-openmower-utils-satabob/hw-openmower-utils-satabob.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Its repository states no licence, so its author keeps all rights: ask xtech before reusing the design.