Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [position]

56 questions
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4 answers

What are my options for detecting the position of a small moving metal object?

This is an airgun pellet trap: I fire small metal pellets at it (4.5mm = .177" in diameter) at up to 120 m/s = 390 fps. What are my options for detecting the X / Y position at which it enters the target? Does it make it easier if I only need to…
Tobia
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In theory, is the position derived from accelerometer absolute?

I recently found multiple research papers that say that in theory double integral of accelerometer data gives a position of the device. Does that refer to absolute position (like the one given by a GPS)? or for example starting position and then…
Maja
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GPS Antenna | When is an Active Antenna really Necessary?

Many vendors provide positioning modules that support active antennas as well as ones that don't. I am using 4 positioning modules out of which 3 of them support active antennas and the other , CC4000 by TI , supports only passive antennas. To be…
Denis
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Detect drones passing through hula-hops

I host some drone races at times and I make gates with hula-hops. I fit some led stripes in there and they glow nicely. We ONLY run micro drones, F36, tinny whoop and those. And mostly indoors (although something that works outdoors would be nice) I…
javirs
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Can a BLDC motor be actively retarded (braked) by decreasing the electrical drive frequency?

I need to implement very fine (positioning) control of my BLDC motor system, one which has significant inertia. Basically servo control of a weighty object. Is it possible for a BLDC motor be retarded (braked) by reducing the drive frequency below…
Ant Williams
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What is the main reason for using speed feedback in a motor positioning control system?

This question is not to solve a particular problem but rather one of principle to understand the main reason a designer would want to include speed feedback in a motor controlled positioning system. And I'm hoping a veteran motor control expert is…
docscience
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Using a potentiometer to replace an absolute optical encoder

I am trying to replace a rotary absolute optical encoder (single turn). The resolution of the encoder is 13 bits (8191). The reason for the replacement is to reduce the cost. My approach is to get a single-turn (electrically) infinite turn…
ElectronS
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How to locate my cats in my house?

I have two cats and want to track in which of the 6 rooms of my flat (about 96 square meters) they currently are. Later I would like to trigger an alarm if they get into a "forbidden" room. The cats are currently not wearing a collar, but I tried it…
muffel
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Determining an aproximate position through triangulation

Disclaimer: I'm relatively new to electronics (although not to programming) so please excuse my ignorance. First of all I should state that I'm aware there are already multiple, well answered posts about this topic. This question is about how to…
AvidScifiReader
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Speed and Position Control for high-volt Elektro Motor with AVR

Is there anything that one can purchase to control speed and position of a high voltage electro motor? I am quite a bit of a noob at this but I could think of a circuit using photo-sensors or hal-sensors to estimate speed and position of something…
Stefan Falk
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IR emmiter and receiver layouts for custom sensor

I'm having a hard time designing a PCB for a sensor array that need to detect if there is a small reflective object (3-20 mm section) in the way. That object can slowly rotate around a shaft. I have tested several sensors,sharp GP2Y0A21YK0F,…
guillem cabo
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what is an affordable indoor 3D positioning sensor setup?

I have a question regarding a problem that seems easy, but after already doing some internet searches, seems not to be that easy to solve. I have a non-moving test setup in a large room where I have to measure the 3D coordinates of some sensors, and…
Hardev
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Violin bow position tracking with SMD LEDs and photoresistors

Objective: Marking labels indicating the positions of the violin bow on an acoustic signal, for example, a single musical note played by a full-length bow. The following video shows the example I am talking about, please just take a look from 1:00…
Fred
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How can I achieve cm accuracy for x,y,z outdoors positioning

How can I achieve cm or less accuracy for x,y,z outdoor positioning contained inside a 100 meter cube (bigger the better but this is minimum). I do not care if I need external beacons/sensors or internal beacons/sensors I just want accuracy. I…
Jamey McElveen
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How do I use the measurements from the datasheet to create a footprint?

I'm trying to make a footprint for a MPU-6050 6-axis gyroscope and accelerometer. I've added the first 12 pins (out of 24), but now I don't know how to proceed. PCB dimesnions: I've added pin 1-6 and 13-18 but I don't know how to calculate the…
nuldum
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