# All Questions

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184 views

### Forward Kinematics Two fixed standard wheels

What would the equations be for the robot's angular and linear velocity at P and also P2? I think I'm doing it wrong... WL = left wheels angular velocity WR = right wheels angular velocity For P I ...
409 views

### SLAM for Autonomous car

I am working on SLAM for autonomous car like vehicles with 2D lasers and IMU (deriving odometry). I would like to know how efficient is using the existing SLAM algorithms (for example: gmapping in ...
2k views

### How are color sensors used for line following?

I have to build a line following robot that will be able to detect a selected colored line on the floor and start following it. How do color sensors do this after detecting the specific colored line?
2k views

### VeX - Keeping arm at an angle

So my team made a Vex robot for the toss-up competition, but we need the arm up during the autonomous. The problem is that it's too heavy to stay up on its own. I was going to use encoders to count ...
118 views

### Can motion model noise be zero?

Can I assume the noise of motion model to be zero? If so, what are the consequences of doing so?
86 views

### VAL language and velocity control of industrial robot

In my bachelor, I programmed CNC machines. Now, working with an Industrial robot arm, I learn that their programming languages are mostly similar. VAL is a typical example, for instance: ...
174 views

### writing a simple program for processing RGBD video with OpenNI

I would like to write a simple program which processes the depth feed from an Asus xtion depth sensor using OpenNI. The sensor will be fixed like a CCTV camera and count multiple targets moving around....
264 views

### looking for a circular track and bearing with a spindle

I've really tried to find something online that's suitable but what I'm after is I've two concentric circular rings, one of which has a diameter about 10mm smaller than the larger . The rings ...
420 views

### Benefits of the Number of Propellers

I am planning on creating a quad-copter with my Arduino that I have. I have created a few land robots before but no aerial vehicles, so this is all new to me. I was looking on the Internet for ...
302 views

### GPS Amplifier - Is this reliable?

I'm multimedia developer who is searching for a way to get GPS signal inside buildings/structures. Is amplification a reliable way to fix this GPS signal issue? Will a "GPS Amplifier" work as ...
784 views

### Alternatives to Primesense depth cameras? [closed]

I'm looking for low-cost depth cameras (less than 1000 USD) with a range of more than 3 meters. Currently, I have found only SoftKinetic DS-311 that meets these requirements. Here are some other ...
2k views

### Connecting a Raspberry Pi to a roomba via an FTDI cable

I have a Raspberry Pi with this FTDI cable and a Roomba 560. The Roomba has an SCI port to allow for control of the roomba via serial. I installed the PySerial library on the pi and send valid ...
343 views

### What should I study if I want to get into robotics? [closed]

I understand this is a broad question but I'm taking the risk to ask anyway. Robotics, from what I can tell so far, is a detailed, diverse, and thorough field. However, if there are better areas of ...
50 views

### How are Interference Avoidance and Collision Avoidance different?

Someone told me when explaining about a controller module named CollisionDetector that it only checks self-interference and ...
2k views

### Quadrocopter first build: how to tell if components play well together?

I'm building my first quadrocopter, and I'm trying to come up with a parts list that is suitable for a first build. I will use this to learn how to fly a quadrocopter manually (lots of crashes!), ...
9k views

### RC Helicopter Connect with computer [closed]

I am planing to control my RC helicopter with my computer. I have experience of programming in .Net. Could we use .Net to control RC helicopter? From where can I start this project?
589 views

### Transformation a robot in 2D?

I'm watching this video at 36.00 min. The guy gave an example but I'm not sure what is the problem. He stated that if we want to move a robot then we should to the following for inhomogeneous case, ...
2k views

### How to link ends of timing belt into loop

When I buy some length of timing belt I don't know how to link ends of timing belt into loop. So far I've found one way to do that (thanks to http://www.lasersaur.com/): http://www.flickr.com/photos/...
232 views

### Is it possible to make DIY clone of MakerBeam [closed]

Is it possible to make clone of http://www.makerbeam.eu/ of some easy accessible material like: wood plywood OSB MDF HDF others Using any type of CNC machine to mill some holes and rails in those ...
3k views

### What is minimum torque required for CNC stepper motors and spindle for aluminium milling?

I am planning to buy CNC mechanical skeleton without motors, spindle and controller. I will be using the CNC mainly for aluminium milling. Are there any specifications for minimum torque requirement ...
74 views

### How to programatically calibrate Turningy esc?

I have a Turnigy ESC and I am controlling it from AVR. Now I need to calibrate it to set the range of the input. With a servo tester I managed to calibrate it without any problems, more or less by ...
2k views

### Android phone + ADK + Arducopter APM 2.5 for autonomous quadcopter

for a project for a robotic lab, i'd like to build an automous quadcopter able to follow a path and land on its own. I'd like to use an onboard android phone to do the image processing and recognition ...
681 views

### What do quadcopter propeller specifications mean?

I'm trying to figure out the diameter of tri-blade propellers. I found a 7x3x4.5 blade, I'm trying to understand the measurements. Is the '7' the length of the blade giving the prop a 10.5" diameter? ...
7k views

### Is configuration space same as joint space?

For robotic manipulator like the one on the picture: are the configuration space and joint space equivalent? I am trying to understand difference between the two...
61 views

Is there any way I can simply run a program on the NXT, but not download it? I have all my programs already downloaded, and I am connecting with a USB cable to a MacBook Pro using the NXT-G interface....
3k views

### Quadcopter Props? Wood vs Plastic vs Carbon Fiber

All the pro FPV builds and the more expensive quads don't seem to be using plastic props. Any reason for this?
1k views

### Low Amp FPV Quadcopter Motors

Why do FPV Quadcopter Motors (usually the more expensive ones) draw lower amps than regular motors? And why are they more squat(disk shaped) as opposed to normal motors which are about the same ...
154 views

### Why is analysis required to study robotics?

I am studying Informatics and I am interested in doing a Masters in Robotics and I was checking out some unis and their courses and I saw that Robotics contains analysis and a lot of math. Why is ...
3k views

### Robotic part to dispense candy

I'm a complete newbie trying to build a simple robot that dispenses candy (M&M, skittles, etc). However, since I'm not familiar with the field, I'm having a hard time googling because I don't ...
54 views

### Connections on a Baby Orangutang B-328 board [closed]

I am new to robotics and planning my first purchase. I'm looking at the Baby Orangutang B-328. Here is information about the microcontroller: http://www.hobbytronics.co.uk/baby-orangutan-328. The pin ...
271 views

### Generic name for two-motor wheeled/tracked robots?

Is there a generic name for the category of robots that move using two opposing wheels or tank-like treads?
3k views

### LIDAR solutions [closed]

I am surprised by the price range of Lidar applications considering the simplicity of the design. I try to make a simple project that requires lidar for object recognitions etc. I wouldn't like to use ...
1k views

### How can I start programming proto X quad

I have bought a really small proto X quad (it has a joystick which navigates the device) and I am looking for a way to send a signal to this thing from my computer. So can anyone point me how can I ...
1k views

### Motion Model for Holonomic Robot

We are working with an holonomic robot equipped with three (120 degree shifted) omnidirectional wheels. The relative movement is estimated by dead reckoning using wheel encoders. To improve this ...
11k views

### Water depth arduino sonar sensor [closed]

Just like a fish finder finds the depth of the water directly beneath it, Im trying to find a sensor that I can purchase for the Arduino that does the same. would like it to check up to 20 ft at least,...
273 views

### Kinect for Xbox: SDK selection

My application is basically about sound source localization and visual servoing. I selected Kinect as the main hardware. I already know the basic differences between Kinect for Windows and Kinect for ...
335 views

### Maximum angle between the camera pose to correctly estimate homography

I want to capture two views of same scene. The scene consists of a set of objects kept on a table. From the two views, I wish to calculate homography for image matching. I want to know what is the ...
537 views

### Using vision for Monte-Carlo localization

From each step of my vision code I am able to get around 400 coordinates of where the robot thinks the walls are I want to integrate this into Monte-Carlo observation step. I'm storing the map of ...
917 views

### Compensating for Yaw in Lateral Quadcopter Movement

I'm trying to make a quadcopter move laterally at a certain angle. I've been able to find the proper roll and pitch angles for this (that work with a yaw of 0°); how would I adjust these values to ...
3k views

### covariance matrix in EKF?

I'm struggling with the concept of covariance matrix.  \Sigma = \begin{bmatrix} \sigma_{xx} & \sigma_{xy} & \sigma_{x \theta} \\ \sigma_{yx} & \sigma_{yy} & \sigma_{y \theta} \\ \...
3k views

### How to: Attach wheel encoder to motor?

I have a couple of these DC motors http://www.pololu.com/product/2202 Which have an extended motor shaft that sticks out the back and is 1mm diameter. I'm having trouble trying to think of the ...
460 views

### Building a mobile camera platform

I have zero experience with robotics, but I need to build a mobile platform for a streaming camera. The idea is that I'll plug in my Android phone into the pan/tilt unit on my wheeled robot and then ...
371 views

### Actuator to control steam valve

I have a steam radiator at home and it has a valve similar to the picture below. Please note that the valve doesn't have grooves on top to attach things to. I want to build something to turn it on ...
192 views

### Explanation of the Kalman Filter [closed]

I am a beginner in robotics, and I am learning about the Kalman filter. I do not seem to get it, though. I am a mathematician, and so it would be helpful if the Kalman filter could be explained in a ...
518 views

### Cons and pros of wireless technologies for rescue robot

robotics enthusiasts! I'm a member of a team which has to develop a mobile rescue robot to cooperate with firemen (e.g. on earthquake sites). The problem we have is connection of a commander post ...
10k views

### Line follower robot program [closed]

I am working on a line follower robot as part of my Microelectronics project, and am confused over what sort of code to use to program the "pic18f" microcontroller I'm using. Can someone give me ...
729 views

### Electronic noses for detecting dog urine

I have very limited experience with sensors or robotic components at all, and I hope you will excuse the lack of detail in this Question. I want to set up posts around my yard with electronic noses ...
5k views

### What motor to use for reciprocating (reversive) movement [closed]

I want to make a copy of this machine Fisher Price Soothing Motions™ Glider and I'm wondering what motor to use? Simple DC motor with appropriate gearbox (slow rpm) or stepper motor? Here is another ...