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Questions tagged [first-robotics]

Questions relating to FIRST programs.

-1
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0answers
8 views

Connecting a Roboclaw 2x15a to an Arduino

I'm new to robotics but have a background in programming. I recently purchased an Arduino Uno starter pack as well as a Roboclaw 2x15a motor controller with 118 RPM motors from ServoCity. I haven't ...
0
votes
2answers
99 views

How do I find the inverse kinematics of a 5-DOF manipulator having the following DH parameters?

alpha = [ -90, 0, 0, 90, 0] a = [ 0, 400, 200, 0, 0] d = [63.5, 0, 0, 90, 100] I am trying to calculate the joint angles but I am stuck ...
0
votes
2answers
34 views

How to get starting location of robot using IMU Sensor (without using gps)

i have one robot, i have to get the initial location of that robot. then when we move the robot from that location, and when we give the command like "HOME" then it should go that initial location. ...
1
vote
1answer
33 views

How to keep track of (x,y) co-ordinates of a line-following bot?

I am working on a bot that follows a certain line path based on some pre-determined algorithm. I would like to know what the (x,y) co-ordinates of my bot are as it traverses with respect to some pre-...
0
votes
1answer
36 views

What is the best way to power source small Robot

I am trying to make a small robot with 4 12 v DC Motor + Raspberry PI + camera possibly a USB camera. I am very confused with power source. Is it possible to get all of them powered by a single power ...
0
votes
2answers
48 views

Beginner Sets for intermediate devs

For a longer time I'm looking for some kind of robotic set, which is programmable, but most things I've found are related to child education or involves a lot of putting all the hardware parts ...
0
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0answers
36 views

Saving a path/track that a robot has already covered

I am designing a line tracking robot, along with some tweaks, I wish to a add a path saving feature. Feature idea : Save the on which robot is moving. Saved path can be used such that when the robot ...
0
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0answers
12 views

Dimensions of an X Quadcopter frame

I'm writing a paper on the calculations required to design of an X frame Quad copter for any particular load.There isn't a lot of material available to guide me through what actually needs to be ...
-1
votes
1answer
29 views

How to proceed whith this design problem? [closed]

I'm intermediate python coder who is using Ubuntu 16.04 and has just finished the beginner tutorial from ROS wiki and I have realized I know very less. I pursuing my own design problem: Designing a ...
2
votes
1answer
79 views

Flight controller drift issue

(This is a little long) So I am working on a drone recently, and aim to control it using an Android device. I've read that it can be done using a Raspberry Pi and Multi Wii, but I couldn't find any ...
0
votes
1answer
41 views

why atleast three points are needed to control 6 dof?

I am reading tutorials on visual servoing using Hand book of robotics and there it is mentioned that in order to control camera's six dof we need atleast 3 points. I didnt quite get the idea behind it?...
1
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0answers
434 views

How to make a line following algortihm for an A.R Drone 2.0? [closed]

I am trying to develop a line following algorithm where a drone will detect a bounding box and follow what is inside the bounding box. I am filtering all the colors to only see the color white. Once ...
1
vote
2answers
82 views

First steps in robotics

I am a High School student and a beginner coming to Robotics and I have no idea where to start. I have spent days searching tutorials and books I could read to start building and programming my first ...
3
votes
1answer
32 views

What parameters can be/should be looked on while deciding to work with a microcontroller in a bot

I understand that choosing a microcontroller is all based on the needs and that there is no perfect Mcu.presently I have to select an MCU for a robot my team is building for the 2018 Abu robotics ...
1
vote
0answers
26 views

Stepper Motor Torque [duplicate]

Tried searching for this answer in a simple way but can't seem to find the answer.. I have a 3 axis Bipolar Nema 17(Took off my 1st 3d printer =) ) robotic arm(Homemade) and provides 28oz-57oz of ...
3
votes
1answer
215 views

How can I use an RC servo to rotate more than 360 deg and still maintain positional accuracy?

RC Servos are great because they are low cost, widely available, easy to control, and pretty accurate. One disadvantage is that they usually have very limited range of motion. This is because they ...
2
votes
3answers
299 views

Robots with less than 6 degrees of freedom

Is there any possibility to have a robot with less than six degrees of freedom & still be able to achieve any position & orientation around end effector?
0
votes
1answer
50 views

Can you detect if encoder wire is connected on a motor?

I am writing some logic for a PID controlled catapult (In order to improve precision). That is all fine and well. However, if, for some reason, the encoder wire disconnects, the motor spins ...
1
vote
1answer
1k views

Error while running rosserial node in ROS

I have an Arduino connected to ROS through serial port. I wrote an ardiuno code to drive motors. below is my code. ...
1
vote
1answer
79 views

Building a stationary robot which can talk [closed]

I am a Computer Science major and I only have basic ideas on Robotics. I am planning to build a stationary cubical AI. The main purpose of this bot will be that, it will have a sensor to check if ...
1
vote
1answer
169 views

Joystick Rate Limit Filter For FRC Java Programming [closed]

I am a programmer for my school's FRC robotics team and have received the request from our hardware/driving department to limit the speed at which the robot's motors can accelerate given a joystick ...
1
vote
1answer
53 views

Combustion engine controlled with a remote [closed]

How can one control a combustion engine using a remote control. Or how would you make a car controlled using a remote.
0
votes
1answer
323 views

How can I measure the height of an object with a single sharp sensor (GP2Y0A21YK0F)?

I have one sharp sensor and I have to use it to measure the height of a block (6cm - 12 cm). How can I accomplish this ? Actually it is to be connected to a robot which will move near the box and ...
0
votes
1answer
1k views

can we detects animals through PIR(passive infrared sensors)

as i dont know that what kind of radiation animals emit. as humans emit IR radiations so PIR sensors help to identify humans. pls suggest me if someone have knowledge about sensors which detects ...
4
votes
2answers
2k views

Designing a 5 bar linkage robot: Plot Clock

I am a beginner at robotics. I recently stumbled across this robotic clock on youtube. I am an electrical engineering student and am interested in submitting it as my minor project. I have studied ...
3
votes
1answer
298 views

image processing

I am making a Robot goalie, the robot is supposed to detect whether a ball has been thrown in its direction , sense the direction of the ball and then stop it from entering the goal post. A webcam ...
-2
votes
1answer
86 views

What I need to learn to build robots [closed]

What subjects are involved in robotics. If I want to build robots then what necessary things I need to learn consecutively as a beginner.
0
votes
1answer
150 views

Connecting USB Xbox Controller to National Instruments cRIO

I have a FIRST Robotics spec National Instruments cRIO. I would like to connect a USB wireless Xbox controller to it in order to control it from a distance with minimal extra hardware (which is why I ...
0
votes
2answers
226 views

Low power to motors — motor power jumper issue

I'm currently working on my first robotics project using the Initio kit from 4tronix powered by Raspberry Pi. The setup was fairly simple, and I've been testing it out over the last couple of days. ...
12
votes
3answers
7k views

Calculating the efficiency of Mecanum wheels

I'm part of a FIRST Robotics team, and we're looking into using Mecanum wheels for our robot. What are the advantages and disadvantages of using Mecanum wheel versus regular ones? From looking ...