Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [mobile-robot]

33 questions
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3 answers

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 signal on the output of my receiver ... a PWM…
Kolban
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4 answers

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 that make less noise? It would also be great if…
James Cadd
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3
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4 answers

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 that in turn spin the wheels of the robot. The…
Devin R
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4 answers

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 obvious solutions like using an accelero-gyro…
Nirav
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3
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4 answers

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 interrupt lines per encoder or 1 but then its not…
leawp
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3
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3 answers

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. O --- O Motor Wheels | | -o---o- Free Wheels. The objective of this…
Mikea15
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4 answers

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 voltage to the 5 volts that the pic needs. I need…
Markovian8261
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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 send a command to the GPRS from my laptop, then GPRS…
David Cameron
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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 make the counter larger. Thanks
Saravana kannan
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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 MATLAB's System Identification Toolbox, of the open…
rflmota
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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 wondering what algorithm i should use to move the rc…
Praveen
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2 answers

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 small wireless (wifi) web cam that runs on…
James Cadd
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1 answer

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 running on the carpet which is a kind of isolation…
calvinglob
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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 voltage and rated current. I am confused on how…
afc2020
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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: # Stop when the Echo pin is no longer high - the end time while GPIO.input(pinEcho) == 1: StopTime = time.time() # If the…
a_sid
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