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[SOLVED] TSOP1738 and 8051 Interfacing For NEC Remote

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mgravi

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Hi Im Trying To Build An NEC Decoder.
I Connected A TSOP1738 To Interrupt 0 Pin (P3.2) Of 8051.
To Make The Port as An Input I Made it High
TSOP1738 Too Is In High Normally And Goes Low When It Receives IR Pulse.
Any How The P3.2 Remains Always High.
How Can I Detect Incoming Of Pulse.
Bit Confusing To Me Can Anybody Help.

(Hope Am Clear About Software Logic But The Hardware Part Confuses)

- - - Updated - - -

This is how I Connected TSOP and 8051
ir.JPG
 

Ok I Got It
Whet TSOP Goes Low P3.2 Sink With The TSOP Pin And Goes Low Too
Thus Interrupt Caused
 

hi i want to make parking slot detector using IR there will be transmitter and receiver but no data transfer required i just want to on LED when slot is occupied and if slot is empty turn of LED using 8051 uC tell me how can i do it :
 

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