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Member level 4
how to use a photodiode
Hi,
A few days ago, I got my self a an IR led and an IR 'sensor'. The IR led looks just like a normal transparent red LED but it is supposed to radiate IR.
The sensor on the other hand looks very peculiar and is completely black in color and covered. I am not so sure on how to use this particular component.
Will the sensor output a HIGH or a LOW when ANY IR light falls over it? Or will it respond to 50% duty cycle 38 KHz carrier wave ? I have done some googling and found most proximity detectors make use of a 38 Khz carrier wave.
Any pointers ?
thanks in advance,
Seemanta
Hi,
A few days ago, I got my self a an IR led and an IR 'sensor'. The IR led looks just like a normal transparent red LED but it is supposed to radiate IR.
The sensor on the other hand looks very peculiar and is completely black in color and covered. I am not so sure on how to use this particular component.
Will the sensor output a HIGH or a LOW when ANY IR light falls over it? Or will it respond to 50% duty cycle 38 KHz carrier wave ? I have done some googling and found most proximity detectors make use of a 38 Khz carrier wave.
Any pointers ?
thanks in advance,
Seemanta