Help!! Problem with IR sensor

[govinho88]

Hi guys,

I tried building an IR sensor circuit, but there seems to be a problem with the detection range and material of detection. It can seem to detect a white paper...However when I put a receiver and a transmitter directly opposite each other it seems to detect. I am guessing that somehow , the IR emitted by my transmitter is not reflected back into my reciever...can anyone help by giving any suggestions..

 

[HarveyH42]

Hi guys,

I tried building an IR sensor circuit, but there seems to be a problem with the detection range and material of detection. It can seem to detect a white paper...However when I put a receiver and a transmitter directly opposite each other it seems to detect. I am guessing that somehow , the IR emitted by my transmitter is not reflected back into my reciever...can anyone help by giving any suggestions..

Hmmm... I'm a little mentally drained from Tropical Storm Fay, so my psychic powers aren't working today. Guess we'll have to do this the normal way...
Need a schematic, a photograph, even some part numbers, to even hazard a guess about what you are doing. There are several ways to do this, and quite a selection of parts to choose from...

 

[govinho88]

Well ok..lol!

The circuit that I used was from this webpage:

**broken link removed**

 

[AllVol]

Well ok..lol!

The circuit that I used was from this webpage:

**broken link removed**

If you have faithfully followed his schematic, and have used his trouble-shooting suggestions, what's your problem?