Detect IR Khz with a phototransistor

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hi, i'd build "learning" infrared remote able detect frequency of original remote use source copy. possible ir phototransistor?

i need because remotes tested not working @ 38khz (more or less) standard frequency.

i think highly optimized code might possible capture digital signal of 38khz. need example, hard make yourself.
you better try few different ir receiver modules 36, 38, , 40khz.

or want know frequency ? easy, long digital signal. have amplify signal transistor or opamp, perhaps need kind of automatic gain. use frequency library : https://www.pjrc.com/teensy/td_libs_freqmeasure.html


Arduino Forum > Using Arduino > Sensors > Detect IR Khz with a phototransistor


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