Questions tagged [mobile-robot]

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Could hall encoders that are attached to the DC motors affect each other or the IMUs?

I am a newbie and I want to build an autonomous mobile robot. I am planning to use 4 DC motors with hall-effect encoders. I will use 4 IMUs for localization at first. Next, I also have the plan to ...
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Chassis / Shielding Grounding on Mobile Robot

I am working on a project building a mobile robot. I realized that the robot will have a buildup static when it is running because I can feel it when I touch it (uncomfortable spark). The robot is ...
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1 vote
3 answers
542 views

How to increase STM32 Timer (encoder mode) counter value?

I am developing mobile robot. Hear i required to read quadrature encoder.So i am using stm32F401 using 16bit timer(encoder mode) to read the count.After 65535 count goes to 0. My question is how to ...
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-1 votes
3 answers
163 views

How to read multiple quadrature encoders using an Arduino

I am developing a 4-wheel mobile robot. Each motor has a quadrature encoder with 2000 pulses per revolution (PPR). I have tried to read the encoders' pulses using an interrupt, but the counted values ...
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1 answer
71 views

How to calculate the rated speed of a DC motor given the no load speed, rated current and rated torque?

I am working on a mobile robotics project and I'm beginning to learn about DC motors. I am looking at a particular geared motor, and the given parameters are the no load speed, the rated torque, rated ...
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86 views

Why can't the HC-SR04 sensor detect objects that are very close to it?

I am following this worksheet and I am struggling to understand the following piece of code: ...
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1 answer
68 views

Modelling the speed control of a mobile robotic system

I am attempting to model a robot and develop a PID based off of the paper at the bottom of this post before developing a physical model. However, the research paper appears to give parameters for ...
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47 views

Trying to figure out an RC Plane Solar Charger

So for a project I am looking at making a solar charge controller for a 3S Li-Ion battery system used in an RC Plane. The issue I am running into now is that I am unsure how to go about designing the ...
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3 answers
177 views

Finding distance travelled by differential drive robot

In a two wheeled differential drive robot, with wheel radius 7cm. bot starts from rest and the two motors are randomly actuated. Left wheel has rotated by 270 degrees, and the right wheel rotates by ...
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2 answers
29 views

Battery fast discharging

It is my first question on this forum. I have a problem with my arduino project. I am working on a mobile robot. I use L298P Motor Shield for controlling the two 5v gearbox motors. The power supply is ...
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1 vote
1 answer
50 views

How can I design a light-weight, on-board battery & charging system for a self-charging robot?

My project involves the robot navigating to its charging station, docking, charging, then resuming whatever it was doing. The robot is a hexapod with 18 leg motors, 2 camera motors, and will be ...
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3 votes
4 answers
179 views

How feasible is it to localize a robot based on EM beacon?

I am designing a little tabletop robot with a very simple goal of keeping track of where it is on the table as he traverses it. This, as it turns out, is a lot more difficult than I imagined. All the ...
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1 answer
277 views

Need to run a mobile robot on batteries

I made a 4wd mobile robot with an 4 DoF robotic arm on it and currently in process of designing a power board for my robot. I would like get a detailed road map on designing a power board for the ...
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3 votes
4 answers
2k views

Using rotary encoders with no interrupt pins

I little background first.. I have 4 separate wheels in my robot and an encoder on each wheel. I am using an arduino mega 2560 which only has 6 interrupt pins, every code that I've seen either uses 2 ...
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1 vote
1 answer
683 views

Why not connect battery negative to chassis?

I am making a mobile robot with a metallic chassis. Usually, a non-moving appliance will have the ground pin of the wall socket connected to the chassis, but in a moving device, there is only the ...
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4 votes
3 answers
3k views

Interference from motors on PWM signal

Am building myself a robot chasis that is RC controlled. There is an RC receiver attached in solution and I have a remote RC transmitter. When the motors are not running, I get a perfectly clean ...
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1 answer
706 views

Pressure sensing controller using Stress Ball

I am thinking of a project proposal for my robotics course and we are required to make one that has a potential application on physical therapy or medical fields. One thing that came across my mind is ...
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2 votes
2 answers
4k views

Cascading PID DC Motor Position & Velocity Controllers

I'm trying to build a robot with a differential drive powered by two DC motors. First I implemented a PID Controller to control the velocity of each motor independently. Estimated the TF using the ...
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3 answers
5k views

Can I power a 5V USB hub using 5.33V DC or should I use 7V with a 7805 voltage regulator?

I'm basically loading up enough batteries to run a USB hub and a webcam. The USB hub is rated at 5 volts. Right now I've connected 8 batteries (these batteries, if relevant) in series and in parallel ...
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1 answer
333 views

Differential Drive for Heavy Robot

I'm asking here another question in relation to my previous one. I would like to know how would one proceed when you want to control a heavy robot with differential wheel drive. When it comes to ...
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3 votes
3 answers
929 views

Motor Control with PMW or RPM on heavy robot

I'm going to try to explain my problem as clearly as I can. I have been building a robot that has four wheels, 2 motors and 2 free wheels. Its a differential drive system. ...
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  • 145
2 votes
4 answers
17k views

How to drop 6 volts to 5 volts

I am designing a robot using the PIC16F877A microcontroller that will avoid walls and obstacles. I plan to have it run off of 4 AA batteries. I was wondering how i would convert the 6 volt input ...
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2 votes
1 answer
234 views

Signal the MCU using GPRS

I am working on a project with a GPRS and MCU. I am feeding the data to my server via GPRS, it's socket server. I was wondering if there is a way ( AT Command ) to do the reverse, I mean I like to ...
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0 votes
2 answers
612 views

How do I connect this 3.3V system and 6V ish system together?

I have an old 'Cybot' robot I built from a kit. I'm trying to mount a Raspberry Pi on it to act as brains. I'm a computer programmer, but my electronics knowledge is very limited. Have access to basic ...
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-4 votes
1 answer
126 views

Cow tipping robot plans [closed]

Does anyone have plans for a cow tipping robot? Its hard to do by hand so we are thinking a robot would be good. I remember seeing a robot wars or some other show where one bot tried to tip another, ...
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3 votes
4 answers
3k views

Decoupling capacitor across Raspberry Pi GPIO input (+ Arduino + robotics)

I've been messing around with a robot kit from Parallax (the BOE Shield Kit), which has a 5xAA (7.2 V?) power source. The BOE shield includes its own 5 V regulator, which is used to control servos ...
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0 votes
2 answers
595 views

PIC18 Robot - Travelling exact distance straight using two wheel encoders problems

(EDIT: Added TMR0 & TMR1 set-up code) I have a small robot vehicle controlled by a PIC18f4585. It has two wheels (ball bearing on the front) as well as two rotary encoders. The following ...
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0 votes
1 answer
118 views

navigating every spot of a room [closed]

I want to build a robot that will navigate over every spot it can in a room. But i thought some kind of a laser to map the room would be best or maybe a ultra sonic sensor. Could anyone guide me in a ...
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1 vote
1 answer
120 views

Is it possible to use USB port with a transmitter to control a robot

I have a project in mind that works as a robot accepting input from the computer through a male connector. I have seen the circuits that use a wire system to connect to the robot. But is there any ...
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1 vote
2 answers
12k views

Motor control with an Arduino Uno... Is it possible (and safe)?

I have an Arduino Uno and an inexpensive RC jeep with a functional DC motor and front-wheel turning servo, but I don't have an Ardumoto shield to control it (yet). I'd really like to learn if it's ...
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2 votes
2 answers
2k views

How do i navigate RC car with a gps module on it from point A to point B?

I want to navigate the RC car from point A to point B. The gps module is used to find the current location coordinates i.e point A. The user enters the point B coordinates based on point A. I am ...
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3 votes
4 answers
1k views

Quieter, faster continuous rotation servos

I'm using a couple of continuous rotation servos to drive the wheels on a mobile robot. One issue I have is that the servos produce a loud, whining sound when in use. Do higher quality servos exist ...
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1 vote
2 answers
2k views

Wireless, battery operated web cam for mobile robot

I'm working on a Netduino based mobile robot that's controlled by software on a PC or phone (WP7). One goal of the project is to be able to steer the robot from another room of the house. Is there a ...
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