Datasheet

Light Sensor

There is an analog light sensor, part number ALS-

PT19 (https://adafru.it/tC2), in the top left part of the

board. This can be used to detect ambient light, with

similar spectral response to the human eye.

This sensor is connect to analog pin A8 and will read

between 0 and 1023 with higher values corresponding

to higher light levels. A reading of about 300 is common

for most indoor light levels.

With some clever code, you can use this as a color

sensor or even a pulse sensor!

Temperature Sensor

There is an NTC thermistor (Murata NCP15XH103F03RC)

that we use for temperature sensing. While it isn't an all-

in-one temperature sensor, with linear output, it's easy

to calculate the temperature based on the analog

voltage on analog pin #A9. There's a 10K resistor

connected to it as a pull down.

Microphone Audio Sensor

A MEMS microphone can be used to detect audio levels

and even perform basic FFT functions. Instead of an

analog microphone, that requires an external op-amp

and level management, we've decided to go with a PDM

microphone. This is a digital mic, and is a lot smaller and

less expensive! You will have to use the

MakeCode/CircuitPython/Arduino support libraries to

read the audio volume, you cannot read it like an analog

voltage.