# All Questions

9 views

### Arduino depth sensor

I'm looking for an arduino compatible depth sensor NOT for water. What I need is a sensor very similar to an Xbox kinect (but much smaller) that will tell me what is in front of the sensor and also ...
12 views

### Compound vision system or Megapixel camera reduction

Are any commercially available compound vision sensors available? Not a simple 8 sensor system using photo-diodes but a genuine sensor that can provide a >32x32 compound matrix. Would some form of ...
7 views

### interfacing arduino uno with 9 dof razor imu

I have followed the tutorial for razor IMU and it worked perfectly when the IMU is directly connected to the PC. Currently, i am trying to interface the 9 dof razor imu with the arduino uno by simply ...
37 views

### making a robot that knows your location

I've just made a radio frequency remote control using PIC microcontroller and I want to do something useful with it. I am thinking of a robot that gets things for you while you are at bed but here ...
40 views

### I want to control a sewing machine motor; need help with choices

I've got an industrial sewing machine (think "can sew with thread that looks like string, and has no trouble pounding through 20 layers of Sunbrella fabric"); it's got a 1 HP motor to power it. (I've ...
31 views

### How would i go about learning to code a flight controller?

I'm interested in quadcopters/multi-rotors and want to eventually code my own flight controller ala an APM and/or Pixhawk. I've got a little experience in programming (i.e i know about if/else/else if ...
17 views

### Error as a State space

I am reading the following research paper regarding Trajectory tracking of mobile robots. http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=5415188 There are two things at the start of the ...
12 views

### PC doesn't recognize APM 2.6 board

I'm trying to download the firmware to APM 2.6 board following the instruction from here. I connected the PC and the APM board via USB cable. At the beginning, I tried on Ubuntu 10, there was no new ...
11 views

### How to send a new Mavlink message from Ardupilot?

I'm trying to add a new message to the MAVLink interface. Following this page, there are the steps I took: Added the message to ardupilotmega.xml. Right at the end of the file: ...
25 views

### Tire slashing robot

I was wondering what would it take to create a small robot that can crawl to a tire on a car while in motion and slash it. What are the main issues that are problematic creating such a robot or why ...
49 views

### Sun tracking with +/- 0.1degree accuracy?

For a school project I am looking to track the sun with +/- 0.1 degree accuracy for use with a parabolic dish reflector. Say we need a final output torque of about 20Nm, what kind of gearing/motors ...
19 views

### To control a omni wheel robot wirelessly using bluetooth and arduino

i am trying to control a omni wheel robot which has 4 motors using 2 joysticks and plus their are some actuations switches which i want to control too. I am using arduino mega and a pair of bluetooth ...
42 views

### what is the easiest method to plot a temperature in my pc?

After a lot of learning, I'm launching a reballing business and I feel the need to have a realtime plot of the temperatures involved (ideally 3 or 4) and I have an arduino uno and a few K type ...
21 views

### Defining a trajectory for a quadrotor

I' m looking for a trajectory generator (the algorithm doesn't matter, since I m going to write it using C++ ) that generates a trajectory (a parametric curve in space) defined point by point which is ...
20 views

### Step Motor and Bevel gear calibration

I am new to robotics. I want to understand how gears state is preserved as the gears turned to same positions repetitively. I have a bevel gear and a step motor connected to one gear. This gear will ...
13 views

### How to create the four way joint at the base of each finger

I need some amount of power going into this joint, and preferably needs to not be magnetic. Here's what I have so far: If this is the best way, (having two separate joints that pivot on opposite ...
35 views

### Simple yet effective angular position sensor to be used in robotic hand

What is the best yet simple to use angular position sensor? I am building a robotic hand and I want to implement this sensor at the joints of the fingers. I don't need a module, just an analogue ...
46 views

### Connecting an Arduino uno with a beaglebone black over USB

I have an arduino uno and a BeagleBone black and would like them to talk with eachother. Both the beagleBone and the arduino have their own 5V power supplies so no need for power to be transferred ...
19 views

### Can i make a bluetooth device [on hold]

I need to make a device that can tell when it has moved a set distance from another. for example if the two devices were placed on a desk they would be happy but at a preset distance when moved apart ...
52 views

### What is recommended prerequisite knowledge to get kid started with Create 2?

What aged children is the Create 2 appropriate for? What is prerequisite knowledge? Is this an appropriate first robot kit for a child?
53 views

### What is the maximum payload weight for create 2/can I use old create accessories with the Create 2?

I'm attempting to build a heavy platform on the Create 2 but am worried about weight on the platform. What is the maximum weight for the platform and is there an optimum? I have an old create and ...
77 views

As already mentioned the PID output values that correspond to the error from the desirable error and current error has no units. Let's say we are using only the proportional part of the PID. Is it ...
30 views

### 2.4 Ghz transmitter controled by Android [on hold]

What is the best way to create a 2.4ghz transmitter that is controlled by Android? I've seen Control a 2.4 Ghz AR Drone from the computer, and the solution there uses a pc-specific USB peripheral. ...
23 views

### APM Planner on Linux/Ubuntu “open from file” not working

I can't open parameter list with APM Planner. Moreover I can't find anyone with same problem. I run it on Ubuntu/trusty 14.04 It does not see files with any extensions including ...
57 views

### Finding the position of a servo

I am building a collision avoidance system for my robot. As a part of this system I am using a pan and tilt kit (http://www.robotshop.com/en/lynxmotion-pan-and-tilt-kit-aluminium2.html) My aim is ...
54 views

### How to find a solution for quadcopter PID control

I've built a quadcopter and a rig to safely test it on. I'm working on the PID for controlling the roll pitch and yaw. I understand how a PID works on a more simple plant like say a robot with wheels ...
19 views

### Robotic reception: your input needed! [on hold]

I'm a Masters student evaluating technologies that will innovate the Facility Management industry, in particular as regards Reception and Security services. Your response will be invaluable. The ideas ...
31 views

### redundant arm path planning and trajectory following

I have a 7dof robotic arm and a set of end effector trajectories in cartesian space I need it to follow. How do I deal with the redundancy in the arm when planning to follow these trajectories both ...
18 views

### 3D Magnetometer calibration algorithm

I want to calibrate my compass, which is installed on a board which inherits a GPS module. Because the GPS antenna is up-side-down the compass is 180° inverted. The easiest way to correct the problem ...
22 views

### Regarding Long distance wireless communication

I have a requirement to transmit some sensor data through wireless to a distance of 2 kilometers. I am a newbie to these technologies and concepts. Can anyone help me by providing some pointers to ...
40 views

### Looking for a cheap(ish) micromouse that I can program with C/C++

I'm looking to buy a micromouse (i.e. a small single-board unit with wheels and IR sensors that can move around freely). I've done a lot of searching but have only found resources relating to building ...
21 views

### How do I set up a rubber hand experiment with precise latency?

The rubber hand illusion (Wikipedia) involves touching both a fake arm and a subject's real arm simultaneously. This causes the subject to feel that the fake arm belongs to him. Normally a human ...
13 views

### robotic cell simulation software plc

I need to simulate robotic cell where cartesian robot trims a PCB arriving on conveyor, picks it up with vacuum cup and and places in another device. After receiving signal from device the robot would ...
12 views

### arduino -lcd screen has weird noise with multiple pictures

I'm connecting an arduino to a lcd screen using the following library. For the display code I have written a simple piece of code that should display 2 picture os eyes (1 angry one friendly) and ...
47 views

### Robot safety standards for software

I am looking for possible ISO standards for robot safety specifically for software. I have come across this presentation that mentions many ISO standards and it's not very clear which exactly applies ...
25 views

### optimal number of robots for cooperative surveillance

Suppose we need to detect the occurrence of a special event in a large area(e.g. a city). If we need that each point being visited every h hours, how could we find the optimal number of robots for ...
34 views

### following a trajectory with LQR controller

We want our wheeled robot to follow a (rather short) trajectory. We wrote an LQR controller, which works well in simulation. However, our robot offers two problems: 1.) The reported state information ...
40 views

### How to synchronize four electric linear actuators (acme screw) lifting a rectangular platform at its corners? [on hold]

Parameters/assumptions of design: Center support is unacceptable, area beneath the platform must be clear. Actuators with built-in positional feedback not available with the stroke (30") and force ...
36 views

### Unable to hover my quadcopter

I'm currently flying a f450 Quadcopter using a APM 2.6 flight controller.While i am able to get the quad off the ground and relatively steady horizontally(via the use of trims).However, i am unable to ...
65 views

### Communicating with syringe pump using PySerial

Let's first start of by explaining that I do not have a decent background in electronics and interfacing with them, so maybe this is a stupid question. I am currently trying to connect an old Harvard ...
8 views

### Raspberry Pi for lighting in a bike [on hold]

Any full source code sample projects about Raspberry Pi (or another) using it in bicycles ? Maybe interesting for create a dashboard in bike for manage lighting ? Examples: live web bicycle (gps ...
15 views

### ubuntu arm lacking /sys/devices/cape-bone-iio

I'm trying to pull analog input from a beaglebone black using this tutorial. However when I go to /sys/devices there is no cape-bone-iio. I have spoken with several other programmers and one of them ...
45 views

### Plastic that's transparent to IR range sensors

Sharp IR range finders are pretty popular sensors, but I usually see them externally mounted and directly exposed to the environment which makes them prone to being damaged or getting crufty. I have ...
22 views

### Simulator for an adaptive, under-actuated robotic gripper

I am looking to build an adaptable robotic arm with under-actuated three (or four) fingered hands. Before I start shelling out money, I want to test my prototypes in a simulator which would ideally ...
50 views

### What motors should I use that do not require gearboxes? This is a car like robot [on hold]

I am new to robotics, and ime looking for a <12v motor that can be used to power a car-like robot.I will have two of these, so I can turn on-spot. Furthermore I want them not to require a gearbox, ...
53 views

### Implementing a torque-controlled method on a position-controlled robot

I am working with a position-controlled manipulator. However, I want to implement a torque-controlled method on this robot. Is there any way to convert a torque command to a position command? I try ...
36 views

### 2D Robot Arm Inverse Kinematics with minimum joint loads

Suppose I have a robot arm with $n$ linkages of fixed length and equal density whose motion constrained within a 2D plane. I want the end effector to reach a particular pose $(x^*,y^*,\theta^*)$. ...
48 views

### Why does the Pixhawk have 2 IMUs

I was looking at the Pixhawk specs and noticed that it has 2 different IMUs- Invensense and STM. Is it for redundancy or does it have any other higher purpose?