Robotics Stack Exchange
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1500 questions
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votes
3 answers

Add hardware reset button for Create2

Is there any way to add a reset button to the Create2 that would be the equivalent of temporarily disconnecting the battery?
Will Schleter
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Air hockey with a robot as an opponent

I'm not sure if this is the right place to post this but here goes. So, as the title states, I'm planning on building a desk that doubles as an air hockey table which has a robot on the other side. The robot would be mounted on a rail which should…
kdyz
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Compatibilty of my setup?

I'm building my first quadcopter, and these are the components I intend to buy: Motor: EMAX BL2212 1400 KV Brushless Outrunner Motor around 0.9 kg thrust: Flight Controller: Multiwii V2.5 Flight Controller Propellers: I don't know which one to…
user10476
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Wall following using hokuyo lidar and sharp IR sensors

I have a mobile robot and I would like it to follow the walls of a room. I have: A map of the room. Wheel encoders for the odometry. A Kalman filter for fusing data from wheel encoders and IMU. A Hokuyo lidar for localization and obstacle…
Naman Kumar
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Arduino mega shield v2.0 compatibility with arduino due

Like the title says.. Will it work? I know about the due 3.3 volt limitations. I want to build a hexapod with 18 servo's. The shield I am looking at: http://yourduino.com/sunshop2/index.php?l=product_detail&p=195 If it isn't compatible. Is there an…
Klaas
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Beginner Soldering question

So, I need to know a couple of things about soldering. My primary workspace, robotics and otherwise, is a desk with a computer and only a little bit of free space (4 ft. by 6 in.). I am wondering if it is safe to solder in such a small area. Also,…
user65909
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How do I dispense a greasy fluid?

I'm a agricultural engineering student and complete newbie trying to build a simple mechanism attached to a drone that dispenses a grease-type fluid. However, since I'm not familiar with the field, I'm having a hard time googling because I don't…
Tiago Pereira
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1 answer

Forward kinematics: Why ω should remain same?

Can anyone please explain me these lines found on page 5 of Kinematics Equations for Differential Drive and Articulated Steering by Thomas Hellström? Note that plugging in $r$ and $v$ for both left and right wheel result in the same $\omega $…
mouse
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How to tune PID for a Y(t) = k*X(t) system?

Could I have your opinions on PID type selection? System description Here comes a very simple system: $\mbox{Output}(t) = k * (\mbox{Input}(t) + \mbox{systemVariable}(t))$. $k$ is constant and $\mbox{systemVariable}(t)$ is a system variable which…
richieqianle
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MCU architecture design

Are there any standards regarding single vs multiple MCU in a robotic system? More specifically, if a single MCU can handle all of the sensor data and actuator controls, is it better to use a single MCU or multiple MCUs in a hierarchical manner? Are…
Damjan Dakic
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What device do I need to project a laser to point at a specific location?

I'm searching for a (commercial) projector that just projects a single laser point into the world (e.g. using two moving mirrors). However, I'm struggling because I'm not sure what such a thing is called. I either find area projectors that use…
FooTheBar
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Deciding length of quadcopter arms

How quadcopter's arm length affect stability? As per my view I'll have better control on copter with longer arms but with stresses in arms and also it doesn't affect lift capabilities.
harshal naik
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Are there off the shelf solutions for GPS+INS (accelerometer,gyro,magneto) sensor fusion for getting filtered/fused location and speed output?

I am working on a project that needs tracking location and speed of pedestrians/runners/athletes (so not really robotics, but I see a lot of related usage and posts in the robotics domain, and an answer to this question could help with follower…
O.K.
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EKF-SLAM initialize new landmark in covariance matrix

I am trying to implement an EKF-SLAM using the algorithm for unknown correspondences proposed in the book "Probalistic Robotics" by Sebastian Thrun in Table 10.2 . By now I understand actually all of the algorithm except of the initialization of…
Marcel_marcel1991
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Calculating Required Torque

Say I had an object with 4 motors/wheels attached (in a fairly standard arrangement). I need to calculate the amount of torque required from the motors to be able to move the object of x kilograms consistently (without skipping any steps) at a…
Alec Dorrington
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