Jun 24, 2013 #1 I Ishwanku Newbie level 6 Joined Mar 5, 2013 Messages 12 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,352 Is sensing of LDR Possible such that resistance of LDR becomes ZERO only after a certain value frequency of light?
Is sensing of LDR Possible such that resistance of LDR becomes ZERO only after a certain value frequency of light?
Jun 24, 2013 #2 FvM Super Moderator Staff member Joined Jan 22, 2008 Messages 53,108 Helped 14,792 Reputation 29,871 Reaction score 14,291 Trophy points 1,393 Location Bochum, Germany Activity points 301,063 "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.
"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.
Jun 24, 2013 #3 I Ishwanku Newbie level 6 Joined Mar 5, 2013 Messages 12 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,352 Can we design an LDR which will work only after a certain wavelenghts of light and not below it????
Jun 24, 2013 #4 FvM Super Moderator Staff member Joined Jan 22, 2008 Messages 53,108 Helped 14,792 Reputation 29,871 Reaction score 14,291 Trophy points 1,393 Location Bochum, Germany Activity points 301,063 What are you trying to achieve?
Jun 25, 2013 #5 I Ishwanku Newbie level 6 Joined Mar 5, 2013 Messages 12 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,352 i want to use a LDR which will work only above a certain range of wavelenths of light.
Jun 25, 2013 #6 Golden Electronics Full Member level 5 Joined May 31, 2013 Messages 308 Helped 50 Reputation 100 Reaction score 47 Trophy points 1,318 Location India Activity points 2,730 U may use comparator so that u set ref voltage & compare it with LDR