Raspberry Pi Forums

Is it possible or has anyone managed to do it?
Use the LED array as a light sensor.

I know the micro:bit now does this with its LED array, have any of the AstroPi challenges or hobbyist managed to get something similar working, if it is possible on the SenseHAT.


(Edit to add a link to the concept since they have a nice explanation https://lancaster-university.github.io/ ... t-sensing/)

The matrix LEDs are all connected to digital logic. The driver IC (that drives at constant-current) is an open-drain type input and the column selects are driven via FET to 5V. Basically, no the LEDs can't be used as photodiodes.

But if you configure PD0-7 of ATTINY88 as inputs and vary RGB maybe you could measure some interval on PD0-7.
https://www.raspberrypi.org/documentati ... T-V1_0.pdf