Questions tagged [robot]

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16 views

Using Encoder data to map / visualize

I have a little robot, with two wheels and two encoders. I get the way and speed of each wheel in software. I am using the speed to calculate these equations: ...
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2answers
283 views

Best way to power 120 VAC fog machine with DC?

OLD: I have a 120 VAC 400 W fog machine. I want to mount this on a robot that can supply 12 volts. Can I just reuse a $10 car inverter from Amazon or is there a better way to do this? UPDATE: So I ...
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1answer
123 views

Stepper Motors (NEMA-17) Won't Run When Wheels Are Attached

My team and I are creating a robot using 4 stepper motors with mecanum wheels and an Arduino Uno. The code appears to be correct, and the motors seem to run just fine on their own, but once we screw ...
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1answer
78 views

What makes a microcontroller development board powerful?

I'm seeing an awful lot of dev boards on the internet that arent Raspberry Pis or Arduinos and I'd like to know what makes a board powerful? Whats the difference between a board that may be used in a ...
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1answer
175 views

Servo motors twitching , arduino Mega [closed]

I am working on a school project: a robotic arm controlled by an Arduino Mega board, 6 servo motors: https://hobbyking.com/en_us/power-hd-lw-20mg-servo.html?___store=en_us 1 PC power supply (450W), ...
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1answer
44 views

2D Positioning Localization

I have a robot. My robot has three main sensors one is a gyro from which i can get my yaw, pitch, and roll. I also have an encoder in the x and y axis. How can I use these sensors together to reliably ...
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2answers
75 views

Max current per battery chemistry

From the background and responses to my other question I gather that 5 NiMH batteries can provide more than 4 A current, and that Alkaline or Manganese batteries cannot. So, what about LiPO, LiFePO4, ...
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1answer
76 views

Required velocity of each wheel in 3-wheel omni bot [closed]

I'm using a 3-wheeled omni bot which can move in any horizontal direction (example: https://www.robotshop.com/en/3wd-48mm-omni-wheel-mobile-robot.html). Given an object velocity (velocity at which ...
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1answer
68 views

Creating Light Sensor [closed]

So the situation is like this, I have a project with a budget of $25. I have to build a robot that is capable of connecting a magnet to a tin can autonomously. I also have a vex kit which I can use ...
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1answer
355 views

Running 18 servo motors on a Hexapod

I am working on a hexapod robot that has 18 servo motors(HS-475HB). My problem is that when I use one servo, the current is about 0.7A at 6V (when moving the servo from its position), when I add ...
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4answers
260 views

Powering Multiple loads from a single 12v battery

I have built a 12v rover - designed to be fully autonomous with a 12v deep cell marine battery as its only power source. It uses the following components: ...
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0answers
68 views

Stepper motor torque requirements

I have a robot that has a load of 60kg and it has to move using 4 stepper motors. I saw from previous searches that the torque required by the motors to move is Force times the wheel radius. COF = 0....
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1answer
67 views

Will this N-Channel Mosfet work as high-current motor controller?

We are building a mobile robot which will use two motors in a differential drive configuration to maneuver and move around, and we want to choose the right driver IC or transistor circuit for the job ...
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1answer
257 views

Darlington Transistor Array Overheating and failure

I own some animatronic robots that use solenoid valves to operate their mechanical movements. Recently I created a pcb that uses three 8 channel Darlington Arrays ULN2803A to control the individual ...
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1answer
337 views

Can lack of current cause servo motors to burn out?

I am building a quadruped robot from 10 MG996R servo motors. I am powering them with 12 Eneloop AA batteries, but I am starting to see that I might be lacking current. The servo spec says that each ...
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1answer
633 views

Ethernet, RS485, CanOpen how to choose the right for robotic Arm

I have a question regarding the communication protocol and physical layer of how to connect the motors of a robotic arm. I have 4 servomotors, Brushless. I need to select a motor drive for each one. ...
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2answers
106 views

Battery selection for a robot

I am currently building a line-following robot for a competition this summer. I have figured out everything except the power. I expect my robot to draw 7.5 amps in the worst case. now, I've selected ...
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1answer
101 views

Sound localizing robot

currently working on a Hobbyist Electronic Project. I have just bought the Rover V2 robot. I have attached 3 microphones to the robot- Front, Left and Right Facing. I have written some basic code to ...
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2answers
417 views

Does a circuit have to be run strictly on DC or AC? [closed]

Hi I know this might sound like dumb question but I've just ran into a problem on a design project. I have no real training or experience with EE or mechatronics and any help is greatly appreciation. ...
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2answers
2k views

Equalizing motors speed for balancing robot

I am currently working on a balancing robot project using Arduino Uno. I am able to get the robot to balance but one of its motor have the tendency to rotate more than the other. I am using the ...
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1answer
88 views

Sequential power circuit for 18 servos

I'm trying to design a servo control board to be a daughter card for DE0-NANO, but run into a problem where all the servos (18 for hexapod) get to the end position on power up. The initial idea was to ...
3
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1answer
521 views

Stepper vs servo or DC motor

My friend and I are currently working on a robotic vehicle project, and he had some spare steppers lying around from a previous project. Instead of using DC motors or servo motors, is it viably to use ...
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2answers
830 views

When to use PID for motor control?

I have a project involving a small robot and I need to write the firmware to control the wheels. Its not something I have done before, so I did some research. In my research I saw that some people use ...
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0answers
1k views

Brushed or Brushless DC motor for self balancing robot?

I am looking to balance a robot using a flywheel connected to a DC motor (think of it as an inverted flywheel pendulum). Similar to this: https://www.youtube.com/watch?v=0312BNqIBFI What I am unsure ...
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1answer
1k views

Why Roomba has IR bumper sensor array?

Roomba has two bumper sensors (left and right, this is what is mentioned almost everywhere), if pressed it recognizes obstacles. Then what is the need of the extra array of IR sensors(6 in number). ...
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1answer
2k views

outdoor ultra sound positioning system robotic lawn mower [duplicate]

I have a dream to build robotic lawn mower that uses a positioning system, so that can cut grass once and effective. Building the robotic lawn mower is not a problem, but the navigation system is, so ...
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1answer
5k views

Basic Robotics Help. Variable motor speed control by ultrasonic sensor input on arduino

First, thank you for taking the time to read my post. I am attempting to use an ultrasonic sensor to control a DC motor using the PWM output of an arduino. Fairly simple, I know, but I'm just a ...
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0answers
80 views

control circuit of humanoid robot: is it worth to learn and use ROS

i am building the upper body of a humanoid robot for my MSc thesis project with 24 dc motors and multiple sensors(something like i-cub or Nao) i have basic knowledge of communication protocols and ...
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0answers
119 views

Reliable docking charging connector?

I am designing a mobile robot which needs to re-charge in a docking station, but I'm having difficulty deciding what to do about the connector. I have two choices: design and make our own connector, ...