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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Compensate centrifugal force in accelerometer measurements

I'm working on a project that includes counting the revolutions of a cylinder connected to an engine. This engine runs at a minimum of 5 revolution per second and a maximum of 9 revolution per second. ...
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221 views

Accelerometer - Offset correction

I'm using the MMA8453Q for motion detection. The accelerometer is mounted such a way that when it is stationary, X & Y axes are at 0g & Z-axis is at 1g. My usecase is: A tilt across any axes ...
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Is “transient detection” exclusive to Freescale?

I'd like to detect the dynamic component of acceleration, i.e. the change in acceleration, and generate an interrupt when such change is detected. I see that MMA8451/2/3 calls this "Transient ...
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31 views

RCWL-0516 Microwave Radar Sensor

I have recently been interacting with these cheap radar modules from China and works fine specifically the RCWL-0516 Microwave Radar Sensor. Now I wanted to integrate the entire circuit into a custom ...
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32 views

Simple Animatronic - slow repeating/reciprocal motion for a window display

I am trying to rig a contraption to pull a model hot air balloon back and forth along a curved horizontal track. Its motion is both horizontal (6’) and vertical. I have built the track and rigged the ...
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How does “Tilt on Wrist Interrupt is detected with one accelerometer axis” work?

bma456 has a tilt-on-wrist detection interrupt. When ever the device is rotated more than a minimum of 12 degrees to gravity, an interrupt interrupt is generated. In the data sheet, it says "The Tilt ...
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200 views

Connect 240v PIR motion detector to Raspberry Pi

I want to connect a 240V PIR motion detector directly to my Raspberry Pi 3. Inside its plastic case I found 2 PCBs. One is the power supply board which has a 24VDC relay, a S9013 NPN transistor, ...
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194 views

Long Range Motion Detection solutions

I'm trying to find solutions for the security of an outdoor area (2km long and 1km wide). We want to detect any breach through the borders of the area, if someone sneaks in and/or someone goes out. ...
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369 views

Relate Pyroelectric Passive Infrared Sensor analog output to the digital “motion detected” signal

I'm using a digital PIR sensors from the picture below. it outputs a high (3.3V) on motion detection, low (0V) when no motion was detected. The analog sensor component of this motion sensor is the <...