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The IR sensor chip from the Normal Wii remote could also be used as a IR homing sensor for Manpads with only the addition of better focus Optics
(sh.itjust.works)
this post was submitted on 30 Apr 2024
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NonCredibleDefense
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I had a whole paragraph about that, but deleted it. The question focused on the IR sensor and processor so that put many other components out of scope.
Consumer grade MEMS sensors would probably just implode at those forces, but I can't really speak to that.
Edit: While I was thinking more about this, it makes complete sense that any circuits would be analog, especially for that time period. With military hardware, durability and reliability is paramount**, so a stinger probably would use something way less complicated than a camera. I don't know for certain, but that is most of the magic of military tech in general.
** lol. I actually said that. Replace "reliability" with "survivability" and that sounds cooler.
IR homing sensors before the digital age where a piece of analog signalpath art. Its mostly rotating a singular ir sensor in 45degree and then mapping the inputs rotation compensated to the control surfaces. Simple at core but cant tell the difference between a jet exhaust, the sun, or a flare.
Modern version are boring is a High resolution ir cam and some blackmagic AI picking targets apart from flares.