gregz wrote in message
.
...
"N_Cook" wrote:
Or at least translucent to visible. Hopelessly undiscriminating IR
encoder &
decoder on a piece of kit but need to see the LED segment display ,
which
inconveniently has the IR Rx within it.
I've tried loads of normal materials like polythene,perspex, glass,
mica,
silicone rubber.
I know black polythene will transmit the IR of PIR units and block
visible
but there is more seperation of f there

Water.

Greg

I tried that yesterday , using a large jam jar , IR passes but perhaps
repeat with something square as the IR may have gone round the water