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Questions tagged [motion]

Motion may refer to the motion of objects, like rotation, drop or picking up, for which **motion sensors** are used. Or it may refer to the motion of persons, for which typically **PIR motion detectors** are used.

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12v LED Strip Lights controlled by PIR *Want to add LDR to project*

I want to add an LDR (Light Dependent Resistor) to my Motion activated stair lights, then On/Off switch can be removed as well as the single Led (On Indicator Only) from my project (I want the LDR to ...
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2answers
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Sensor options to detect ball

I am working on what I hope is a simple project as I am dabbling in this field. I am trying to create a target (in the shape of a box) roughly 1m by 0.5 meters into which soccer balls will be shot (...
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3answers
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Can I electronically trigger a PIR motion sensor?

I would like to trigger a PIR sensor using an infrared LED. Is that possible? My goal is to simulate motion in front of the PIR, when there otherwise is none. I tried using a handheld remote ...
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8answers
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Looking for small motion sensor

Are there other options for a small (< 5mm long) low-g motion sensor than accelerometers? I don't need to measure the acceleration picking up my device causes, I just want a 1/0 signal when it ...
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3answers
2k views

Generating electricity by moving a door

I'm entirely new to electrical engineering. This is for a hardware/software project I have in mind, where I need electricity without having to plug the device into a power source. My intention is to ...
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2answers
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PIR sensor led strip with N channel mosftet

I have a PIR sensor (HC-SR501) and I want it to turn an led strip(12V 0.8A) on when the sensor detects motion and off when there's no motion. I checked a previous thread which is similar in that ...
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2answers
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What is this component (probably a shock/vibration sensor)?

The other day I received a promotional wrist band from a convention booth -- it has two LEDs that flash when you jostle it. I removed the guts to see how it works, and here is what I found: Most of ...
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4answers
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How to count the number of people in a room with a specific sensor? [closed]

I want to count the number of people in a small room. According to my research, there are person-counters in the web but I want to use the number of people data for coding hence I must transfer the ...
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1answer
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motion detected protocol

Is there a standard protocol for motion sensors, PIR sensors, etc. to tell parking lot lights, etc. that motion has been detected, so the lights need to turn on? I'm not asking for protocols that ...