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Anonymous at Mon, 8 Apr 2024 19:44:29 UTC No. 16119581
How do sensors work?
Whenever I read something on them, it's always something like
>motion sensors detect movement and send a signal to x electronics to perform y function
Okay, but *how*? What does 'send a signal' mean? Send current?
Anonymous at Mon, 8 Apr 2024 19:52:34 UTC No. 16119612
>>16119581
Some have a camera and an invisible laser. Those use a destination thingie tht detects the disturbance of that reflection. Those are more accurate but also take up more space. Others are just a camera that detects pixels changing. Can be any spectrum. The sensors then send an electrical signal, yes.
Anonymous at Mon, 8 Apr 2024 19:58:15 UTC No. 16119630
>>16119581
usually a disturbance in a steady system. either no signal normally and when motion it sends a signal, either constant flow of certain level signal, and when sensor detects it interrupts it. depends on application and sensor but sensors deal with a change in something and there's usually electric signals involved, at least going to the CPU.
Anonymous at Mon, 8 Apr 2024 20:00:57 UTC No. 16119637
>>16119581
Mmany sensors now are made on an IC so the signal is pre-processed.
Anonymous at Mon, 8 Apr 2024 20:08:16 UTC No. 16119660
>>16119630 (me)
and it can either be a binary sensor, yes/no thing, either a spectrum, like an analog voltage or even current. like 0V to 5V for brightness detection or whatever. this way you get more resolution in what you want to sense.
but an open door sensor is an on/off thing, for example. you could get more info, about how wide it opened, with an analog signal, but for most uses that is not important so a simple binary sensors works fine.
Anonymous at Tue, 9 Apr 2024 07:34:55 UTC No. 16120508
>>16119581
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