So I have sort of done this before but I have not implemented in the Raspberry Pi build as I was not comfortable that the current access to IR light would be sufficient. However I have got a T74 with a 850nm IR LED so I am sure that will be able to get it to have at least some short range. If I am honest I think I might be lucky to get 30m, the distance of my back garden. However until I complete the build who knows.
Stay tuned......
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