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Old 12th April 2012, 10:17 AM   #1
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Default Infrared plastic window for remote control receiver

Hi Guys,

I am having trouble locating an Infrared transparent filter window for a remote control volume circuit in an amp I am building.

They are made of the same material as the black plastic window on the tip of remote controls. All I need is a small sheet of this material to cover a circular hole in the front panel of my amp which houses two infrared receiver diodes.

Any ideas?
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Old 12th April 2012, 11:45 AM   #2
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Plexi and window tint possibly.
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Old 12th April 2012, 12:29 PM   #3
marce is offline marce  United Kingdom
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Dark Red plastic, the lack of light in the box makes it apear black.
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Old 12th April 2012, 12:30 PM   #4
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Unexposed, developed slide film can be used as an IR filter. From the photophiles here.
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Old 12th April 2012, 03:56 PM   #5
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Thanks for the replies guys,

The trick with the unexposed developed film might be my only option, if I don't find a donor device or a good source of infrared transparent plastic.
I guess I could stick it to a small donut of acrylic plastic and stick the whole thing in the hole in my front panel.

I will bring a small remote control and my camera phone to the houseware store and using them will try to find some dark plastic material that is IR transparent. Cameras can see infrared. Try it. Maybe some plastic paper trays or boxes or something. Another possibility might be a donor USB receiver dongle for presentations(Powerpoint).

If anyone has a proper source, then please let me know. I will post my final solution.
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Old 12th April 2012, 04:12 PM   #6
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Have a look in Staples - they do a good range of colourful plastic folders that may be suitable.

If you dont have Staples in Switzerland, any large office supplier.
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Old 12th April 2012, 05:49 PM   #7
DF96 is offline DF96  England
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Dark red, nearly black, plastics can be fairly transparent to IR. Something like polystyrene with a red dye, but little or no opaque filler material?
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Old 12th April 2012, 08:05 PM   #8
RJM1 is offline RJM1  United States
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Also completely exposed and developed Kodak color print film works good as an IR filter
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Old 2nd June 2012, 03:52 AM   #9
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Or a IR filter for B&W film photography. Found at most well stocked photo store. Made of thin plastic or polyester.
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Old 2nd June 2012, 09:01 PM   #10
Spiny is offline Spiny  United Kingdom
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CPC and similar carry filters.
IR filter
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