Sensing of LDR - activation to certain range of frequencies

[Ishwanku]

Is sensing of LDR Possible such that resistance of LDR becomes ZERO only after a certain value frequency of light?

 

[FvM]

"Frequency of light" means wavelength respectively light color?

LDR resistance will never become zero. LDR have a typical maximum spectral sensitivity at yellow to green wavelengths, quite similar to the human eye.

 

[Ishwanku]

Can we design an LDR which will work only after a certain wavelenghts of light and not below it????

 

[FvM]

What are you trying to achieve?

 

[Ishwanku]

i want to use a LDR which will work only above a certain range of wavelenths of light.

 

[Golden Electronics]

U may use comparator so that u set ref voltage & compare it with LDR