Hello. I have a photodetector operating in photoconductive mode with a red LED as the light source. This LED is powered by a freq. generator set to 1Hz pulses. To make sure that my photodetector is generating these input pulses, I attached the output of the detector to an oscilliscope, which did varify I am getting squarewave pulses with 5V peaks. Now when I input this to another LED, I the LED does not pulse. The LED works fine, because when I attached the freq. generator directly to it, the LED pulses perfectly. Does anyone know why this is? The LED is getting more than enough voltage from the photodetector, yet it still doesn't work.