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Questions tagged [movement]

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0
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0answers
30 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 ...
0
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3answers
86 views

Which type of sensor for measuring height of horse step?

Is that possible? I'd like to track the amplitude of a horse leg/foot height for a show. The many many difficulties: constantly moving! So ultrasound way too slow the floor is irregular, made of ...
6
votes
5answers
523 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 "...
0
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1answer
51 views

How to move a magnet to a specific coordinate on a board

I was just reading about Claude Shannon's famous maze-solving mouse, Theseus, which used a movable magnet under the maze to draw the mouse in a given direction. I'd like to play around with this idea. ...
1
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1answer
223 views

Angles Measurement to control (move) a robotic arm [closed]

I am working on a robotic arm, I am going to use servo motors, those are going to be controlled from the PC with command (it is a chess-game arm) so the command will be some thing like move piece from ...
0
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1answer
147 views

Servo Motor Won't Turn

I am new to these types of projects and mostly program so I don't understand completely the functions so it would help if your answer was thoroughly explained. What my project is we have a python ...
0
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0answers
90 views

Push-pull mechanism

I'm new here and I'm sorry if this question is inappropriate. I'm trying to build refreshable braille display that will be placed inside of a desk, so I have a lot of vertical space. To build display ...
1
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2answers
395 views

Detect movement in a very power efficient way

I am working on a device i can strap on to an expensive electronics instrument, and when someone moves the instrument, the device detects it and sends its position from a GPS to a server, via WiFi, ...
0
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2answers
87 views

accurately move an object in linear steps with electro motor [closed]

How would you tackle the problem of moving an 1-2 kg object in a linear fashion from point A to B to C and than back to point A and so on? Points A,B,C are fixed and require high accuracy. This image ...
0
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1answer
110 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 ...
0
votes
1answer
104 views

How to track the 3d movement of a small animal in a 4x4x8 meter cage?

I need to track the movement of a small animal (60 grams) in a cage which contains plants, shelter, branches and so on. I need all three coordinates in real time. Spatial resolution should should not ...
1
vote
2answers
382 views

Recording motion/movement sequence efficiently & accurately

We have a motion platform (camera - pan & tilt) that is controlled by a user using a joystick (so the demand inputs are pan & tilt velocities). The platform itself uses stepper motors, so we ...
0
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2answers
80 views

Detecting a threshold position in movement

I am raising an object/platform up and down using a DC motor connected to a threaded rod. I wish to know exactly when the top of the object reaches a certain threshold point during its movement, sort ...
0
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2answers
577 views

Which force moves the armature of an electric motor?

As I understood the tangential force F on a current-carrying conductor in a magnetic field makes the armature of a electric motor move. But actually the groove where the conductor is located in is (...
0
votes
1answer
828 views

ADXL 335, lack of resolution for short angle inclination?

I am currently working on a project where I would like to measure X/Y inclinations changes, without worrying too much about the acceleration. I decided to use ADXL335 accelerometers in order to ...
3
votes
2answers
611 views

How to move an object through 30 degree rotation? [closed]

I want to make an electronic bird feeder in which the feeder floor tips 30 degree down to exhaust the used seeds. I know how to work with PIC micro controllers to do the timing and enabling an output, ...
0
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3answers
259 views

Movement of Electricity in a Simple Circuit: A Few Simple Questions and a Diagram

The diagram above is of two batteries a light bulb and some cables. A book that I am reading shows that electricity would not flow through the blue cable, it would flow through the red cable. This ...
3
votes
1answer
443 views

How do I manipulate a large number of moving platforms?

I might not be in the best place to ask this and feel free to tell me to move my question to another Stack Exchange. I am trying to build a device that will allow me to control at least a couple ...
4
votes
2answers
805 views

Ideas for precisely moving a small object in 2 dimensions?

We would like to precisely control the position of a small object in a X-Y plane. The object we are moving contains a LED diode and some optics. The restrictions are: The total area is 9mm x 6mm We'...
0
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1answer
450 views

Detecting very simple movements (a hand waving) usable on 8bits microcontroller

Recently i saw a video about Nest Protect, an smart smoke detector, that can be operated by waving your hand under it. Since there is no visible holes on the lower part i suppose they are not using ...
0
votes
2answers
229 views

Tracking movement of limbs for smartphone app

I'm looking at building a smartphone app that will need to track the users limbs (say legs/feet) as accurately as possible. The goal is to trace the moments of body parts and the timing of the ...
1
vote
3answers
1k views

Is it true that copying is the most CPU intensive operation?

A mech engineer said that copying puts more load on the microprocessor than "other" operations (e.g. moving data or creating the same amount of new data). Is this true? Can you elaborate? I understand ...
7
votes
3answers
1k views

Can a DC motor with obstructed movement be damaged?

I am trying to build shades, which should roll up or down, controlled by a DC motor. This motor can only be turned on or off (1/0 to turn it on/off). Also, it should be noted that the microcontroller ...
5
votes
2answers
793 views

light system for stairs

I have a stair made of several steps. I want that when I put a foot on a step, the light of the next step is turned on. Each light is placed just under the edge of the step. If I use LEDs as lights, ...
9
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4answers
2k views

Methods to accurately move an object across a 2-D plane

This is the opposite/complement of my previous question, which concerned measuring the precise position of an object as it is moved/drawn by someone over a short duration. Assuming I use one of @...
5
votes
2answers
519 views

How to use a sensor in order to detect if a mechanical component has moved?

Specifically, I am trying to detect whether an umbilical boom from fueling a rocket has retracted, and other miscellaneous tasks (vents raised / retracted). I have done some research and have found ...
7
votes
2answers
21k views

smooth a motor movement

i have a stepper motor (controlled by an arduino) that moves some gears and a pulley. the problem is that the pulley jerks a lot: the movement begin and stop too much suddenly. to make the movement ...
3
votes
2answers
350 views

Circuit movement detector

I'm looking for some simple schematic for movement detection. I want to use it with a small hobby project of my own to detect if someone is moving the box, doesn't matter the direction. I'm looking ...
7
votes
2answers
3k views

Servo Motor Won't Turn Without Push

So, please forgive me for the naiveté I'm most certainly going to exhibit here. I'm mostly a software guy, so this project is a little out of my comfort zone. Nevertheless: Project I have been given ...
0
votes
1answer
171 views

Finger movement detection devices

Let's consider a device such as a game controller or a standard remote control, but which is not controlled by "standard" keys. Instead, the idea is to minimize finger movement, such as in a keyer. ...
4
votes
1answer
299 views

How can I measure which finger is moving in a glove?

I am considering building a pair of gloves that make a chorded keyboard. In order to measure whether or not a finger should be triggered, I intend to leverage the fact that as you curl your fingers ...
3
votes
5answers
3k views

How can I measure small scale movement with an electronic component?

I'm working on a project which involves measuring the distance between two pins which are nominally 3-5 cm apart. These pins can move up to 1cm in either direction. I need to take a measurement of ...