hello
I'm using TSOP4838 to detect an IR LED that I'm using for a proximity sensor

the IR LED is already modulated (by a PIC) to 38 kHz (1ms oscillating, 1ms LOW)

the problem I'm having is that this detector is extremely sensitive
I tried with my remote control, even if I put a couple of paper in front of the sensor and activate the remote control, it detects it ... which is great for long distance communication, but terrible for a proximity sensor for 2~3inches

if I plug a LED on the same board, I never get to make "not-detect"

any hints?

 

Hello,

How are the led and tsop situated?
Can you make a drawing?

Bertus

 

1) If you plug into the same board, be sure the power supply has adequate decoupling capacitors -- at the supply and at each device.
2) Paper is or can be almost transparent to IR. Use black vinyl electrical tape. An aluminum can (like a cigar tube) also blocks IR.

John