infrared transceiver

[louislu]

hi...currently doin a proj regading infrared transmission.here a prob would like to ask for help...i m using HSDL-1100 infrared transceiver to establish a infrared transmission.it seems no pron in transmitter end but the receiver end is easily susceptible to noise.i m quite sure these noise come from flourescent light.because when i switch off the light then everything all right.however this infrared transceiver is designed to has immunity of sunlight or flouresescent light.anyone can tell me y?thanks in advance....

 

[Nigel Goodwin]

I'm not familiar with that device, but usually IR transmissions use a carrier frequency to help avoid external light problems - commonly 38KHz in normal TV remotes.

But IR sensors are generally sensitive to visible light as well, they just have a reduced sensitivity to it.

 

[fat-tony]

You could put a filter over it. It's just a piece of plastic that absorbs most visible light.