That can't be possibly true with all brands.
I use to use black electrical tape to cover the IR sensor in
VCR's to prevent them ejecting the tape while I hunted
around with a flash light.


> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Adam Bryant
> Sent: Thursday, January 21, 1999 12:01 PM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: light sensitivity with uncovered window JW part
>
>
> You wrote:
>
>
>
> >Also, some labels that look opaque to you are NOT.  I use old 5.25
> >disk write protect tabs when I do power tests to be sure- I assume
> >the foil makes the difference.  There must be other really opaque
> >materials.
> >Has anyone tried regular black vinyl electrical tape?
>
> Black electrical tape is transparent to IR light.  It was posted on the
> piclist a while back that it makes a good filter when working with IR
> sensors.  I didn't believe it myself until I wired up an IR receiver and
> covered it with electrical tape and saw that it could still receive.
>