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| -rw-r--r-- | docs/Measuring_Resonances.md | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/docs/Measuring_Resonances.md b/docs/Measuring_Resonances.md index e346a178..481f5cea 100644 --- a/docs/Measuring_Resonances.md +++ b/docs/Measuring_Resonances.md @@ -8,6 +8,12 @@ Note that using ADXL345 requires some soldering and crimping. ADXL345 can be connected to a Raspberry Pi directly, or to an SPI interface of an MCU board (it needs to be reasonably fast). +When sourcing ADLX345, be aware that there is a variety of different PCB +board designs and different clones of them. Make sure that the board supports +SPI mode (small number of boards appear to be hard-configured for I2C by +pulling SDO to GND), and, if it is going to be connected to a 5V printer MCU, +that it has a voltage regulator and a level shifter. + Installation instructions =========================== |