the TSOP sensor output is | Microcontroller › AVR › Basic interfacing of tsop ir receiver with Atmega16 › the TSOP sensor output is January 10, 2015 at 10:10 am #12508 Ashutosh BhattParticipant the TSOP sensor output is normally high and it goes low when it detects signal. also check for signal change on any single pin only not whole port.
