Yes, it is possible to build an IR break beam sensor with the protoboard.
But, there are 2 reasons why it would be illegal for Hot Shot! :
1. The Q&A response for using LEDs as a sensor
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Originally Posted by FTC Q&A
A: <R5>d.8 specifically limits LED's to be used only for signaling to the drive team or for decorations. Homebrew light sensors using LED light sources do not fit within the allowed usages of LEDs and are therefore not allowed.
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2. The rule restricting it to visible light only
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Originally Posted by FTC Rules
<R5> d.8 8. Only visible light LEDs may be connected to the Prototype Board. These visible LEDs may only be used as a cueing signal for the team or for decoration. If used, the purpose must be demonstrated during inspection.
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