PCB v2.0
gauteh opened this issue · 4 comments
gauteh commented
- Notecarrier A
- Magnetometer: LIS3MDL or combined ISM330DHCX + LIS3MDL (https://www.adafruit.com/product/4569)
- External GPS: https://www.sparkfun.com/products/18037
It seems that the combined ISM330DHCX+LIS3MDL is the most available and compact one. Maybe we should aim for that one first (replacing the ISM330DHCX, and adding LIS3MDL).
- Create or find symbols for components above
- Create or find footprints for components above
- Wire new schematic:
- LIS3MDL and ISM330DHCX can be on same I2C bus
- GPS can be on same I2C bus as Notecard
- Onboard-antennas + GND-plane on Notecarrier should not be covered.
gauteh commented
LIS3MDL can act as external sensor to ISM330DHCX, which will probably be necessary to get sampling right and put the LIS3MDL readings into the ISM330DHCX FIFO.
gauteh commented
First revision ready, all seems to work, but a few things to fix in next iteration:
- swap direction on sd-card
- replace temp-sensor with uart pins+add resistor
- add output for pt1000 and chip-select pins
- add on-off button?
- maybe add DS248-100 for 1-wire
gauteh commented
gauteh commented
Next iteration in progress, board is slightly too big for bottle, but possible to force down. For next version:
- Reduce board size