Hi everyone,
I have a project where there is a laser modulated at 100kHz and a TIA photodiode that output all the spectrum from 3kHz to 15MHz. After the TIA I will put a very narrow filter centered at 100kHz.
If the required event occurs, then the photodiode will receive the 100kHz signal from the laser.
Else, there is just the noise.
When there is the 100kHz signal at the output of the TIA connected to the teensy, I would like that the teensy outputs a 5v signal. If there is no 100kHz signal (below a certain threshold) detected, I would like it outputs 0V.
I guess I need to use the analog input of the teensy but I do not know if it can analyse up to 100kHz signal ?
Do you have an idea how I can make this possible ? It sounds like maybe FFT analysis...
Thanks !
I have a project where there is a laser modulated at 100kHz and a TIA photodiode that output all the spectrum from 3kHz to 15MHz. After the TIA I will put a very narrow filter centered at 100kHz.
If the required event occurs, then the photodiode will receive the 100kHz signal from the laser.
Else, there is just the noise.
When there is the 100kHz signal at the output of the TIA connected to the teensy, I would like that the teensy outputs a 5v signal. If there is no 100kHz signal (below a certain threshold) detected, I would like it outputs 0V.
I guess I need to use the analog input of the teensy but I do not know if it can analyse up to 100kHz signal ?
Do you have an idea how I can make this possible ? It sounds like maybe FFT analysis...
Thanks !