questions about TSOP or IR receiver modules

hexreader said:

High is the normal idle state of TSOP1738.

The output will go LOW when it receives 38KHz IR, but only for a short time, as there is a maximum mark time (see the data sheet).

The receiver is good at rejecting ambient light and sunlight, within reason.

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hexreader said:

I have never heard of 38KHz IR being used outdoors, so I have no idea whether it would work. I suspect that direct sunlight might be too much for the receiver to cope with, but I really don't know.

When you say 38KHz modulated, I hope you mean modulated with something like a 500Hz square wave. That should work, or anything from about 100Hz to about 2KHz.

Steady 38KHz will not work.

Hope this helps

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I have never heard of 38KHz IR being used outdoors, so I have no idea whether it would work. I suspect that direct sunlight might be too much for the receiver to cope with, but I really don't know.

When you say 38KHz modulated, I hope you mean modulated with something like a 500Hz square wave. That should work, or anything from about 100Hz to about 2KHz.

Steady 38KHz will not work.

Click to expand...