# All Questions

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### How do I caefully remove the top green cover?

I'm trying to remove the top green cover to access the cable port. How do I remove it so I don't break any tabs?
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### Como controlar um drone seeker Af911 usando um Joystick pelo computador?

** Como controlar um drone seeker Af911 usando um Joystick pelo computador? Tive problemas com o controle de configuração A/C 2.4 hz
293 views

### What is the difference between Multiple robots and swarm robots?

What is the difference between Multiple robots and swarm robots? What is the key point? Also what is multi agent systems? Do multi agent systems works only for computer simulations or games? These ...
27 views

### idea for web application in robotics

I am learning and I am interested robotics, but also I need to update my web development skills so the question is - is there any idea for good web application that could be connected with robotics - ...
28 views

### Interfacing GPU image processing with motor control at 30+Hz

I would like to make a robotic system which takes as input a video feed, runs some GPU-based image recognition on the video, and outputs commands to a set of motors. The goal is to have the motors ...
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### Suggestion for a camera

Are there good low cost cameras that are frequently used in robotics? I am assuming there are cameras that are good fit for robotics ... Works well with OpenCV PC Windows support - USB2/USB3 (GigE, ...
30 views

### Arduino triggers a camera to start recording

I've already made an Arduino device which detects the trigger event, but now I want it to trigger the recording and storage of video when this event occurs. If the camera could be wirelessly ...
55 views

### Image based 3d position estimation with one camera

There is too many 2d position estimation with one camera. Is there any 3d position estimation application or technique with one camera? If there is no application or technique why?
34 views

### The number of wheels I need to use?

I am making a robot as a part of a project. The criterion for this robot is that it has to carry a payload of 2 kilos around the room. Is there a specific configuration of wheels/number of wheels/the ...
20 views

### Driving a non-circular timing belt

I'd like to create a camera slider similar to this one. The only part I'm not sure on is how to setup the camera drive. It looks like I can buy a similar timing belt here, but I'm not sure how to ...
76 views

### Mechanical design for base of robotic arm

I am using DC motors to build a robotic arm. I want to make the base shoulder (which rotates and lifts) more stable and stronger. How should I design this using DC motors? Also I would like to put ...
63 views

### Why do my ESCs stop working?

I'm new to robotics and this is my first time building a quadcopter. I'm unable to work out why I keep losing ESCs. Most recently in testing, I've managed to calibrate all 4 ESCs and accurately ...
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### position control for linear model of quadrotor (problem with tracking task)

Lately, if you notice I have posted some questions regarding position tracking for nonlinear model. I couldn't do it. I've switched to linear model, hope I can do it. For regulation problem, the ...
37 views

### How to transfer signed integers with libusb?

Folks at programmers stack exchange asked me ask here: I want to communicate with an arduino and sent integers it. I code this program in C++. I initialy used bulk_transfer(), but it sends only char ...
20 views

### Position estimation from photo fingerprinting

i want to make 3d position and position change estimation from photos taken from flying robot. I need suggestions for fast photo matching.
43 views

### Vacuum Lifter: Moving Playing Cards

I'd like to buy a small Vacuum Lifter so that I can move playing cards around with robotics. But my "google-fu" is failing me. I don't really know what search terms to look for... or what webpages to ...
62 views

### How can I make a motion tracking camera?

I'm looking into CCTV, and am interested in minimising costs by having a motion tracking camera cover an area that would otherwise utilise multiple cameras. There is already something like this on ...
49 views

### 2Nm small motor

Currently designing a spherical wrist, I want to manipulate a 300gr payload. the design has a 200mm span, so I'm guessing at a 1.1Nm (considering the weight of structure & motors). I've looked ...
30 views

### How can i make a compact soft robot

I want to make a compact (actuators motors and sensors are all in one) soft robot. Actuators can be pneumatic or dielectric. I need suggestions about manufacturating. I'm open to new ideas.
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### Proprietary movement platforms

Are there any companies out there providing proprietary chassis as in industrial duty ones rather than the hobbyist radio controlled car sized ones? I'm thinking something that allows a robot to move ...
57 views

### How to controle dc motor

I have 2 of these 12v motors and a 12v battery http://www.enigmaindustries.com/Motors/Bosch_EV_Warrior.htm I would like to know what the best solution for controlling this motor with an Arduino Uno ...
41 views

### Arm to disassemble and assemble notebook at home?

Suppose I have perfect AI to control robotic arm. What characteristics should it fulfill to be able to take such common tools as screwdriver and linesman's and disassemble and then assemble ...
45 views

### Help with ultrasonic sensors on obstacles avoiding robot

Well, I will start directly in my problem. I'm working on a project and I only have 10 days left. The idea is simple, a wheeled robot with 3 ultrasonic sensors to avoid obstacles. I've developed a ...
18 views

### Dispensing precise quantities of liquid and powder [duplicate]

I've been toying around with the idea of automating the process of testing aquarium water for certain chemicals. Very briefly, salt water aquariums (reefs, specifically) require almost-daily testing ...
15 views

### Stereo vision in Matlab

I am working on a project about robot soccer vision. How I utilize two webcams as a stereo vision in matlab for robot soccer matters?
39 views

### Linear Motion Control for quadrotor (clarification)

I've posted a question regarding this matter that I couldn't solve. I'm reading this paper, the authors state Linear $x$ and $y$ Motion Control: From the mathematical model one can see that the ...
46 views

In terms of robotics, what are the differences between odometry and dead-reckoning? I read that odometry uses wheel sensors to estimate position, and dead-reckoning also uses wheel sensors, but ...
23 views

### Adding an Actuator or Force to a (Featherstone) Articulated Rigid Body Model

I'm working on a project where I need to model a system that is essentially comprised of a series of ball-and-socket joints attached to a base, which is attached in turn to a prismatic joint (rail). ...
36 views

### Assuming I have the angle with respect to two beacons, and know the distance between them, can I localize myself?

Let's assume I have the following situation, and need to find (x,y). Is it possible? There does not appear to be more than one solution to the system, but my trigonometry is a bit rusty. I feel ...
18 views

### How would I implement a following drone with a camera using GPS?

As the title states, is there any way to make a following drone that tracks a GPS unit, and follows/orients camera to that? Similar to this
28 views

### What is load current and load speed? Which battery is best suitable for this motor? [closed]

These are the specifications of the motor: 25000RPM no load speed at 12V No Load Current - 1A, Stall Current - 10A 0.36Kgcm torque What is the definition of load current and load ...
50 views

### How can I make a quadcopter avoid obstacles using infrared?

I have a quadcopter built, and I need to be able to make it to autonomously follow a route and avoid obstacles where possible. My general plan is to have an array of sensors on a pre-defined "front". ...
47 views

### PID over another module that implements a PID control?

I'm in charge of a module to control the smoothness with which a platform should move; the platform already implements a closed-loop control on its own but this firmware is closed and I do not have ...
24 views

### How to make Robot Following System using an Active Antenna Tracking?

I want to know how to make a robot track another robot using wireless. What's the best way to make a robot follow another robot if it is not more than 1000 meters from it? Like these robots in the ...
68 views

### Sensing the level of a liquid in a tube

I'm looking to build a sensor which will detect the level of liquid in a tube. It does not have to be precisely accurate, just detect whether the level is approximately above a certain height. The ...
52 views

### Cool robotics projects [closed]

I'm a robotics student but very new to this field. Can you suggest any websites which provide projects/helpful info that I can learn from? Thanks
54 views

### Is there a bug in the Encoder Counts packets 43&44?

I think I have just found another bug - there was one that was mentioned in another post about the angle and distance. This one is about reading the encoder's counts. I was using them as a workaround ...
44 views

### Quadcopter - is iPhone the ultimate flight controller?

iPhone contains Gyroscope GPS Two photo and video cameras Self-sufficient battery that outlives the motor battery Wifi Backup connectivity (cellular, bluetooth) Programmable computer Real-time image ...
65 views

### How many quadcopters would it take to lift a burrito?

I am investigating a possible business opportunity in which quadcopters perform high-precision nutritional delivery via a burrito medium. I have never used a burrito, but I have read on the internet ...
22 views

### Conceptual problem regarding electronic shutters

I have been looking at CCD and CMOS sensors and cameras to decide which one to use in the process of automatic control of a printing process. By now I am getting the grips on almost all the essential ...
64 views

### Fast C++ library for stereo vision/disparity computation [closed]

I am looking for a library for disparity map / stereo vision computation. These are my requirements: C++ Multi-platform (Linux, Windows, OSX) (preferrable but not mandatory) not CUDA based Suited ...
20 views

### Underwater ROV Variable Ballast

How would you guys recommend making a variable ballast system for an underwater robot? I was thinking about this problem earlier and I was trying to figure out if there was a way to make one that ...
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### Embedded Image Processing System that sends photos to Smartphone via Bluetooth

I would like to create an embedded system that takes a Full HD photo by pressing a button, processes and compresses it(for ex. to jpg) and then sends it via Bluetooth to the smartphone - where it's ...
150 views

### how to implement and code inner and outer PD controllers for quadrotor for position tracking

The quadrotor system is multi-ODEs equations. The linearized model is usually used especially for position tracking, therefore one can determine the desired x-y positions based on the roll and pitch ...
44 views

### Are LiPo really 100 times more energy dense than model rockets?

Lately I've been interested in comparing the energy density of model rocket engines to lithium polymer batteries (attached to motors and propellers) for propelling things upwards. To get a feel for ...
25 views

### How to send mouse coordinates to arduino or other microcontroller?

I want to measure pixels traveled by a robot, how can i send mouse coordinates to arduino or other micro controller programmed using atmel studio.
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### What determines BLDC rotation direction when using trapezoidal commutation with BiPolar Switching?

Block commutation seems simple enough, the rotation is determined by the order in which the 6 step sequence is executed (ex. cw 1->6 or ccw 6->1) What's confusing is how bipolar switching changes ...
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### System identification on a physical system with constrains

What kind of input output test can be peformed on at physical system which has constraints to identify the transfer function. The system which is being discussed is a pan/tilt unit.. The input it ...