Jan 24, 2013 #1 A ata90 Member level 5 Joined Apr 13, 2009 Messages 89 Helped 1 Reputation 2 Reaction score 1 Trophy points 1,288 Activity points 1,945 Can LDR (Light Dependent Resistor) sense pulsed light with frequency of 1 KHz ?
Jan 25, 2013 #2 M mspagon Junior Member level 3 Joined Nov 17, 2012 Messages 26 Helped 1 Reputation 2 Reaction score 1 Trophy points 1,283 Activity points 1,490 My initial guess was no. But, I don't know much about LDR - I found something online. https://www.google.com/url?sa=t&rct...X9OlxsPwNVOsLIdSA&sig2=5k-HAFZoHc40njfrmufkEg Look at page 4, there is a graph of voltage vs frequency, and it really only detects up to 100 Hz. But I could be wrong, they might have a more expensive LDR made for such purposes.
My initial guess was no. But, I don't know much about LDR - I found something online. https://www.google.com/url?sa=t&rct...X9OlxsPwNVOsLIdSA&sig2=5k-HAFZoHc40njfrmufkEg Look at page 4, there is a graph of voltage vs frequency, and it really only detects up to 100 Hz. But I could be wrong, they might have a more expensive LDR made for such purposes.