# All Questions

2 views

### Move ATRV robot to specific distance using ROS

Is there a node or package that can send commands to /cmd_vel to move ATRV-Jr like 2 meters forward or turn it 90 degree to right/left? I don't want to tell the ...
27 views

### Algebraic and geometric in inverse kinematic

I'm just wondering that is there any case that when algebraic way can't solve the problem while the geometric can ? Cause I'm working on a 2DOF robotics arm This one, I know the length of L1 and L2, ...
10 views

### Turning a differential drive robot to a specific angle [duplicate]

Given a robot with 2 wheels with radius r on one axle with length D, I want to set the wheel speed so that it turns to an angle phi as fast as possible. The timestep t is 64 milliseconds. I thought ...
17 views

### What dependencies do I need for USB programing in python with pyUSB?

I am trying to get the usb.find command to work properly in a python script I'm writing on Angstrom for the Beagleboard. Here is my code: ...
10 views

### line following robot with ev3 colour sensor

I am trying to build an advanced coloured lines following robot with the ability to differentiate between many different coloured lines and follow it. I am finding for the right sensor that will help ...
24 views

### Transform Image Using Roll-Pitch-Yaw Angles (image rectification)

UPDATE: This exact problem has been solved in StackOverflow. Please read this post there for further explanation and a working solution. Thanks! I am working on an application where I need to rectify ...
26 views

### where can i learn electronics from intro to advance digital [on hold]

I'd like some well put video series of like 30 videos. Or anything but it needs to thorough and in easy English...less mundane. So far all resources i have found either go upto resistors code or of ...
20 views

### Image retrieval through a multibeam imaging sonar

I would like to know if anyone here has used the Blueview SDK (Linux) for retrieval of images from the pings obtained by a multibeam sonar (P450, P900, etc.) ? If so, I'd like to know why would anyone ...
23 views

### Resampling attitude states (quaternions, rotation matrix) in a Particle Filter

Suppose I have a particle filter which contains an attitude state (we'll use a unit quaternion from the body to the earth frame for this discussion) $\mathbf{q}_b^e$. What methods should or should ...
53 views

### Deburring Robot (Plastic Box)

For a university course I have been asked to design a rough "specification" for a system that will deburr a plastic box that appears in a workspace. Due to irregularities in the boxes edges I cannot ...
48 views

### Defining frames for 5DOF robotics arm

For examples if i have this robotic arm: Example, for the base rotation (5th DOF in the clip at 0:58), we know that the Z axis for that joint will be the same as the Z axis for the base frame{0}, but ...
23 views

### sending and receiving parameters to ardupilot

I am interested in getting an arducopter with an ardupilot(APM). I read through the documentation and from what I understand, ardupilot is the low level hardware and firmware that directly controls ...
43 views

### Have bloodstream nanobots been approved in any countries?

OK, sorry if this has been posted on the wrong site. Wasn't sure if I should post this here, in Biology, etc. A Google search on "bloodstream nanobots" yields thousands of results, and, just on the ...
56 views

### RC Transmitter Quadcopter with Arduino

I have a WL v262 quadcopter and I want to control it using Arduino instead of the joysticks on the transmitter. I opened up the transmitter and saw that each joystick has 2 potentiometers on the PCB ...
25 views

### POMDPs in robotics

POMDPs are used when we cannot observe all the states. However, I cannot figure out when these POMDPs can be useful in robotics. What is a good example of the use of POMDPs? (I have read one paper ...
55 views

### What happened to Butler's car?

Having read the article "This Car Has Electric Brains" in Popular Mechanics, August 1958 ...
63 views

### 360 degree ultrasonic beacon sensor

Basically, I want to detect an ultrasonic beacon in a radius around the robot. The beacon would have a separate ultrasonic emitter while the robot would have the spinning receiver. Are there any ...
37 views

### How to calculate probability of particle survival for particle filter?

I'm trying to figure out a way that I can calculate the probability that a particle will survive the re-sampling step in the particle filter algorithm. For the simple case of multinomial re-sampling, ...
27 views

### Do I need an accurate flight model for a UAV?

As I understand it, a Kalman filter uses a mathematical model of the robot to predict the robot's state at t+1. It then combines that prediction with information from sensors to get a better sense of ...
30 views

### Best libraries for a mobile robot with Kinect [on hold]

I am creating an humanoid robot with a mobile base with wheels( it is necessary that it has wheels, so I cant put it legs) I decided to put a Kinect sensor to control the obstacles, to track people, ...
67 views

### Are there any GPS sensors that provide data at 1Hz or faster?

I searched for GPS devices that provide 1 sec updates to server, but I have not found any. I found this T=30s.Module has sent a monitoring data packet. After 12 seconds the server sends an ...
32 views

### Using Armatures in Morse Robotic Simulator

I'm trying to add my own robot in Morse 1.1 (using Ubuntu 12.04). I am struggling to add an armature actuator and armature pose sensor to an existing robot. Can someone please explain how this can be ...
149 views

### How to use Arduino for ESC control?

I am using an Arduino Uno to control an ESC for my (in progress) quadrocopter. I am currently using the servo library to control the ESC, which works great. Except.. A count of 100 is max speed, ...
72 views

### Wifi to pass through aluminium

I am about to make an rc car which uses a wifi connection. The body for the car would be made from aluminium and the wifi receiver will be placed inside this aluminium casing. How do I make sure ...
43 views

### Compiling Code for EY-80

I recently purchased at EY-80 from electrodragon: EY-80 All in one 9-Axis Motion Sensor (Gyro + Acceler + Magneto + Baro) I am having a hard time compiling the example code on my arduino: This is ...
33 views

### Powering down servos completely in RobotC+Tetrix

For a certain robotic application (actually for the FTC challenge this year) our team is performing an operation where a servo-driven arm could potentially be forced into an unknown position. We are ...
43 views

### Which Kinect to a movement base?

I am making a mobile base for a robot with wheels. I want to use a Kinect like a movement sensor (to avoid obstacles, recognition of people, etc...) but I read that there is 2 models, the 360 and the ...
56 views

### Fake localization using bag file in ROS

I have a bag file that contains couple of topics needed for localization, odometry data, kinect data and /tf. What I want is watching robot's movement path in ...
32 views

### Arduino Uno getting a type of “HANGED” while runing samll code of switc debounce and Serial print

I am using Arduino UNO to read a push button every time it is pressed.Earlier i was simply reading the Digital IO pin to read the count and then i faced the condition of switch debounce regarding ...
30 views

### Soft LED Protection Material

I am looking for some material to build a soft clear protective covering for RGB LEDs. The material needs to be close to transparent to allow light to shine through, be soft and compliant but sturdy ...
83 views

### Recommendations for system to repeatedly force contact between head and desk [closed]

I frequently bang my head on my desk after performing a task poorly. I would like to eliminate the unnecessary middle step of actually performing a task poorly. As such, I would like to design a ...
89 views

### Particle filter implementation in ROS

I'm looking for particle filter implementation in ROS to use in mobile robot localization, but it seems the only available package is amcl (Adaptive Monte Carlo), I'm not sure is it possible to use it ...
24 views

### Omron G5V-2 relay NO pins not working

I could swear that it was working for a while. I got back to my desk, tried it again, and it's no longer working. Could I have fried the NO pins on both sides? This is a DPDT relay. Everything works ...
101 views

### My Pi is losing power in a surge

I have a RC car. The battery provides power to the ESC and then the ESC provides 6V power back out to the receiver. Instead of the receiver I have a Pi, which uses the 6V, steps it down to 5V and ...
47 views

### Remote controlled robotic insects [on hold]

I have recently seen the Harvard monolithic bee and it's functionality. It is very impressive. The question is what kind of similar robot can be made with cheap materials ? It must have the following ...
54 views

### Marine Robotics Depth Control [on hold]

Is there somewhere I can read up on this topic. I wish to implement it for a project. Thanks for any suggestions!
76 views

### Unable to read pushbutton press properly in Arduino

I am trying to use a push button in order to know and print number of time a push button is pressed using a counter.But everytime i press the button , counter get incremented to sometime 3 and ...
117 views

### Bluetooth module HC-05 giving ERROR :(0)

I am working right now with Arduino UNO and HC-05 bluetooth module.I followed the instruction given on this link for wiring. So there are 2 mode of working with this HC-05 module Simple serial ...
87 views

### Odd L293D behavior: Pin 16 seems to act as enable

I have a chip that is labeled L293D with a small 'ST' logo, which does not behave like I believe a L239D should: I have the chip on a breadboard with pins 4,5,12 and 13 connected to the ground rail. ...
57 views

### Encoder based speed control for Rover 5

I am trying to get precise control over the speed of rover 5 based robot. It has four PWM controlled motors and 4 Optical Quadrature Encoders. I am using 4-channel motor controller with rover 5 ...
47 views

I'm interested in getting a Create for a project I'll be working on, and wanted some information about it from somebody that already has one: How much weight can it safely carry? I talked with ...
31 views

### Totally hands free phone for paralyzed person

I'm trying to figure out a completely hands free phone solution for a paralyzed person. I've tried the moto x android phone as well as a jailbroken iphone with siri always listening The problem with ...
62 views

### Choosing correct power supply for Stepper Motors

I am building a machine and need 2 Stepper Motor for that. The motors are driven using by a 3.3v arm device. I have made the following selections regarding the stepper motor, stepper motor driver and ...
53 views

### quadrotor experimental identification [on hold]

i want to model the quadrotor using experimental method "i have not built it yet" what i want to do is: turn only one motor at a specific speed ,then plot the x,y,z and the angles then identify the ...
81 views

### Making high CAN baud rates work

I'm dealing with a board that no matter what I do I can't seem to make CAN work over 125 kbit/s. I'll give some detail about the board on the bottom, but I'm going to keep this question generic. ...
65 views

### Cheapest 3D printer for gears?

It would be incredibly useful if I could print my own gearing solutions, even if I have to print the gears one at a time. However, I do not know how the market's cheapest printers will accommodate ...
36 views

### Rocker bogie suspension

from the designs usually shown in the rocker bogie systems, the whole weight of platform seems to be supported by one rod only, be it differential bar or gear. so isn't it a bit unstable system ...
66 views

### Calculate covariance matrix from x,y,z data

In ROS I've recorded a bag file from a custom robot (in real world) that does not provide covariance matrix and I want to use /odom to feed an EKF, but covariance ...