even with a filter, sunlight contains
plenty if IR (that's why you feel
heat
when you go outside in sunlight (at least in summer :P))
try putting a cardboard tube (like from a roll of
toilet paper)
around your IR detector so only your IR-led/laser's
light
can get to it
_____
>|- ~~~> ~~~>
~~~> ()____[] <-ir detector
^- Ir led
Please feel free to flame me 'cause of
my
poor ascii art diagrams (and 'cause I'm
using
this porportionate font and the html'ness
of
my reply :P)
Hi,
I'm using a PIC16C508A to
transmit/receiver I.R. pulse (negative width pulse=5ms and positive width
pulse=200ms).
The circuit board receiver IR no
problems w/ absence light, but I've problems w/ sunlight and lamplight
incandescent.
The receiver IR phototransistor
w/ filter IR.
What's the problems ? Any
suggestion ?.
This is circuit attached.
Thank you.
Marco Aurelio B. M.