That should give you a small size, IR communication capabilities and do what you asked.However, since you're claiming to be a 'huge doctor who fan' who wants to build a sonic screwdriver, don't you think you should be ashamed? Sounds like you should be doing this with a speaker/microphone combination instead Grin
I wonder if there is enough room for a small tv be gone type circuit.
Called the µTVBG, it packs an entire TV-B-Gone in a 1.4 x 2.5 cm footprint and even has room for a programming header.
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