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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52 views

HB100 Range extension with Dish Antenna

I have interfaced HB100 sensor with ATMega Microcontroller. It easily detects my hand movement upto 5-6 inches only. I want to extend range of the sensor so that it detect movement upto atleast ...
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36 views

Better displacement finder? Lasers/Inertial Sensors

I've seen laser rpm measurement devices. But can it be used the find displacement/distance moved for object when attached to it? I know taking rpm of wheel and multiplying by circumference would give ...
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65 views

Triggering 12v Relay with HC-SR501 PIR sensor

I have a SRD-12VDC-SL-C relay with this configuration: https://robu.in/product/1-roadchannel-relay-module-light-coupling-12v/ And I want to trigger it with PIR Motion Sensor Detector Module HC-SR501 ...
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25 views

Advice on setting up sensor switch

Hi I would like to fit a (motion sensor/IR sensor) sensor switch to a machine in my catering van. The machine is a 12v machine. I would like to start the machine using the sensor switch and would like ...
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1answer
114 views

Motion sensor to detect birds and small animals but ignore humans

I would like to develop a motion activated sprinkler to deter birds (cranes and other smaller birds) and small animals from eating the fish in my pond. I am using the approach of controlling a ...
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39 views

PIR motion sensor connected to Arduino sometimes does not detect a repeatable trigger

I have connected the PIR motion sensor HC-SR501 to an Arduino Uno and its jumper settings is set to H and GND. (This is not a physical jumper, but a small link that connects both H and GND.) It ...
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75 views

Motion triggered battery powered dimmable COB LED light

My view on life, in any field, is not to produce more but to consume less. Everybody told me this is a very eccentric weird mentality. Perhaps they are right. Nevertheless I have to build my project ...
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17 views

How to select a proper IMU sensor to mount on leg?

This may not related to electrical, but an IMU sensor involved i am posting this, I need to select an acceleration sensor to mount on the leg (ankle) to track acceleration and movement of the leg, I ...
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85 views

Change closing transistor to opening in a Microwave Radar Switch?

Preamble: I have little knowledge of electronics in detail, but I know how to solder, have a working brain and am fearless :) There are many low-cost Microwave Radar Switch PCBs out there (very ...
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1answer
122 views

How to enable the DMP of the MPU9250?

The datasheet mentions some Advanced Hardware Features which gets executed by the Digital Motion Processor. I'd like to use the ...
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1answer
81 views

Can failure of an old electrolytic capacitor be precipitated by motion?

I have report of a circuit board failure. The board was 20+ years old, and included at least one electrolytic capacitor. That capacitor would then be beyond its expected useful life. The board was ...
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31 views

Motion Detector Time Adjustment

What it means when adjustment area is: 10±5 s-10min? I cannot find a solution from Google.
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49 views

Sensor fusion using IMU sensor

How to do the sensor fusion using the 4 IMU sensors. Here, 4 IMU sensors are used to know the location of every point where the IMUs are placed? I need the location of the every point on a 3D graph ...
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104 views

What type of sensor to detect if an object passes through?

(Sorry for my bad English) Hello guys, I need your help since I have no idea about electronic stuff. I have a table soccer and want to install motion sensors in the goals, so whenever the ball ...
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1answer
78 views

Converting Battery Operated Motion Sensor Light to AC Powered

I have converted many battery powered devices to AC adapter in the past. This time around I am using a Motion Sensor light which takes 4 C batteries and is used to light a closet. When I connect a ...
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1answer
78 views

P30N06 Mosfet Not Working Correctly

I have an N Channel Mosfets I'm trying to use as a switch for a motion sensor and an LED strip light (12V <0.8A). It seems like no matter how I hook up the mosfet it is always set to 12V or stuck ...
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2answers
970 views

Read Quadrature encoders over I2C bus

I need to add encoders to the 4 motors attached to a "remote" PCB. The remote PCB in question does not have microcontroller on it, but rather is connected to the microcontroller PCB with an I2C ...
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3answers
135 views

Is there any way to obtain linear or angular distance proportional to a voltage signal?

If we have a programmable arbitrary function generator as a voltage signal source and if we are able to output any waveform like a sine or exponential decay as output voltage versus time; how can this ...
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1answer
220 views

To Fail-Safe or not Fail-Safe on RS485/422 Transceiver

I'm stuck on a PCB design issue. I'm designing a new PCB (Daughter board) that will plug (via DB15-F to DB15-M) onto another PCB (existing Mother board) and the design intent is to take (from the ...
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1answer
336 views

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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791 views

Identify this component with a weight inside a cylinder

This component was pulled from a device that was used to detect movement. When I first saw this part, I thought it was an electrolytic capacitor, but upon closer inspection, I found that if I shake ...
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5answers
3k views

Stepper Motor acceleration profiles for short runs

I've done a fair bit of reading on stepper motors and acceleration. I had to wade through a lot of different strategies with a lot of calculations, including one which called for several candles, and "...
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2answers
4k views

motion sensor with high pitch noise?

Don't know exactly where I should post this but I'm pretty sure it would be fine here . I was walking home right now late a t night and I walked by this persons house and out of no where I heard a ...
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1answer
321 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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143 views

Is mbed RTOS suitable for commercial motion control solutions

Is the mbed RTOS suitable for commercial motion control applications? Is it advisable to separate the actual motion controller from the network handler, etc (i.e. motion controller in separate MCU)? ...
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3answers
678 views

How can feedforward be used with PID for motion control

In a motion control system where a motor accelerates, coasts, and decelerates (setpoint is position, not velocity!), what would be the benefit of using feedforward with PID, instead of solely PID? ...
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1answer
719 views

presence detection using Panasonic grid eye [closed]

I want to use grid eye AMG8833 for presence detection. Has anyone used gridEye for the same purpose? Or Can someone suggest algorithms to decide whether someone is present beneath the sensor or not ?...
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123 views

Choosing an Encoder Resolution

What is the minimum resolution recommended for low acceleration motion control? Maximum Velocity can range between 2 rev/sec to 50 rev/sec. Acceleration could be as low as 0.01 rev/sec/sec. ...
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2answers
1k views

i want to use motion sensor module ouput to trigger a triac

i am begginer in electronics and this is my first circuit its about a small motion sensor 220v AC switch i want to make myself but i want to use Triac as a solid state relay insteade of normal relays ...
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1answer
214 views

Main switch circuit with thyristor and bridge problem

Following circuit is a 220V touch switch from this website: http://8085projects.info/m668-based-touch-sensitive-step-dimmer-circuit.html I'm wondering how it works because the IC take its working ...
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1answer
87 views

Change in current for a moving sliding bar? [closed]

From this diagram: This design is inspired by the classical rail configuration, however, now having all the current flow direction in the -y axis. There are two components, a large rigid conductor ...
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0answers
216 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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1answer
182 views

High resolution rotary encoder

I'm trying to find a way to translate small angle rotation into some form of digital signal. 1 degree resolution would be excellent, but something like 5 degrees would be ok. I need something like a ...
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2answers
620 views

pir motion sensor sensor - working principle

I read about how PIR sensor works. It is written that it has two slots that convert IR energy to electrical voltage pulses. The working principle is to diff between the two slots and when the ...
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1answer
374 views

ARM Cortex-R for motion control application [closed]

I need to control about 50-motors(brush DC/Stepper) with each of them having an encoder for feedback.Precise motion control is needed for each motor axis.I have been looking at ARM cortex-M4 ...
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6answers
11k views

What makes smartphones tilt-sensitive? Will they retain this ability in zero-gravity conditions?

Most smartphones are tilt-sensitive, but what device makes this possible? Additionally, how does it (and the sensors associated with it) work? Also, since the working of these sensors seem, almost ...
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2answers
3k views

PIR sensor not triggering P2N2222

I have this setup where a PIR sensor (HC-SR501) powers an LED strip with the help of a P2N2222 transistor. I then manually connected the Transistor base to the 12v rail and it has no problem ...
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4answers
4k views

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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1answer
715 views

how to program BMI160 inertial measuremen unit to latch detection flags

How should BMI160 registers be set to enable detection flags to be set in INT_STATUS? For example, how to get TAP_STATUS byte-0 bit-5 s_tap_int to set if XDK110 is tapped? I don't need actual ...
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1answer
115 views

Fast, long linear motion (about 60 cm/ 23 inches) [closed]

I'm currently researching a way to build a punch imitation (for boxing training) and for this i need a simple, fast (if it can be configurable great) and long linear motion which can handle a ...
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1answer
71 views

PIR motion detector or Emitter receiver pair or? [duplicate]

I have a simple 3 ft by 3 ft goal. I want to electronically detect when a ball passes into the goal but not when it goes wide. I had initially thought i could use a simple PIR motion detector ...
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4answers
9k views

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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0answers
231 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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1answer
332 views

Accelerometer - Tilt Detection

I'm using the MMA8453Q for tilt detection of 45 degree in any axis. I'm a newbie to embedded devices. I have a few questions. 1) Should I be using Transient detection or Motion detection for my use ...
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0answers
519 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 <...
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1answer
74 views

MEMS measurements of relative motion [closed]

I haven't performed any tests, but if I am in a train with velocity != 0, what will measure my IMU? (With IMU I suppose to have acc + gyr + magn). I am in a relative motion system, and my MEMS will ...
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1answer
122 views

passive motion sensor

I would like to get a microcontroller out of sleep when the board starts moving (or vibrating). If possible it should just be a passive switch (I only need a positive edge from a battery to get the ...
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3answers
8k views

Pinout of microwave motion sensor FC1816

Please, help to figure out the pinout of microwave motion sensor FC1816. The seller "doesn't understand" what it is required on queries to provide the pinout for the module. The module is the ...
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1answer
1k views

MPU 6050 Digital Motion Processor Gyro Units

I'm running into an odd issue with a motion control processor (MPU 6050 / 9150) that is returning raw gyroscope values as specified between the -/+ 32768 which in the way this gyro is configured ...
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1answer
251 views

How to detect end of avaliable movement of mechanism connected to a stepper motor, without external detectors?

I have access to (not quite working) 3D printer. It has no endstops, no switches that would detect extreme positions of head or table. I know this because I was there when it was assembled. All cables ...