Sensor Locations

Hardware Nano Family Nano 33 BLE
1

Is there a board layout diagram somewhere that shows where each sensor is located. I am specifically interested in knowing the location of the color sensor. Also, when you are looking at the top side of the board with the USB connector on the right, there is an unpopulated IC location near the top row of pins between the USB connector and the RESET button. Does anyone know what might go in that location? Thanks, Ed

2

If you look at the page for the Nano 33 BLE in the Arduino Store, under Documentation you will find the schematics and Eagle files, which contain the PCB layout. If you look at the Nano 33 BLE Sense, it appears to use the same PCB, with a component added where the unpopulated IC location is (at least in some of the pictures, in others it is unpopulated, possibly a mix-up in the photos between the two boards).

3

Well, I have most of my answers, but still some confusion.

If you are holding the Nano with the USB connector on the left (as per the photo on the Arduino.cc web page):

  1. The device immediately to the left of the blox module is the microphone, which STM identifies as an omnidirectional stereo microphone. (That sounds like a bit of an oxymoron.)

  2. The device immediately to left of the above device is the proximity/light/color/gesture sensor.

  3. The device below the proximity sensor and near the edge pins is the nano pressure sensor.

  4. The device just above and to the right of the "T" in the "RST" silkscreen is the temperature and humidity sensor.

Here is where Arduino starts making it confusing.

A. In some of their photos of the Nano 33 BLE sense there is a missing device just above the microphone. In other photos, there is a device in that location (which looks like the device on my Sense board. The photo of the Nano 33 BLE shows a different device in that location.

B. In some photos of the Sense board there is an 8-pin device installed near the edge pins below and to the left of the RESET button. The device is labelled TW8477J8, which does not return anything useful on Google. This device is missing on the Nano 33 BLE photos, some of the Nano 33 BLE Sense photos, and my Sense board.

I probably won't spend any more time on this since I have located the color sensor.