here we are again: i have an IR led (940nm) working quite well (i could see it with my phone) from an arduino IO pin. I also bought a vishay IR 38KHz receiver, precisely a TSOP38338SS1V (this one http://www.vishay.com/docs/81744/tsop381.pdf ). i know this one acts as a filter, de-modulator and stuff…

IR leds and 38KHz receivers as a optoencoder or similiar

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