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1answer
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Step/Dir input Servo Drive: how does it work internally compared to a serial input drive

I believe that the most common type of servo drives are based on STEP/Direction input which is inherited from the Stepper motor controllers. My question is how does the type of controller work ...
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84 views

Path Following for a Differential Drive Robot - MATLAB & Simulink

I have the Kinematical model of Skid-Steering Robot with Differential Drive is illustrated in the below figure. Lambda_L is the Left wheel slipping so Lambda_R the are assumed constants 0.01, c is ...
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1answer
32 views

Problem of detecting very close objects by SRF05 Ultrasonic sensor

I'm using SRF05 for distance measurement, but the major problem is that this module will not differ a very close object and no object. So its impossible to say ...
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2answers
72 views

3.3V input to 5V output for motor control

I wanted to connect my DC motor to raspberry PI and control it with PWM pin. Problem is that gpio pins are 3.3V in PI and I have pololu 10:1 DC motor which I would like to run on 5V(to make it faster)....
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1answer
65 views

Symbol on silk screen of design

This is the circuit diagram I used to make my line follower robot. I don't understand the symbol at the right side down corner, the one that is a circle with 3 dots inside. As this is my first PCB ...
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2answers
91 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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3answers
122 views

h bridge leaking current?

I have built an H-bridge with the following schematic. My motor controls a wheel that I want to turn backwards and forwards. The voltages to the bases of the BJTs are supplied by an Arduino. the ...
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2answers
106 views

is soldering necessary for a robotics and electronics hobbyist?

I know it is VERY common but I am worried about the exposure. I do understand it is minimal if an extraction device is used to get rid of the gasses and if a lead-free solder is used but I ...
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1answer
64 views

How to connect absolute encoder on the rotating shaft. Please see the three options?

Hi, Here I have added 2 options for connecting encoder on shaft. Motor, gearhead and shaft is connected using coupling. But where will be best place for encoder (To avoid backlash from coupling and ...
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1answer
97 views

driving 10A motor [closed]

I have made a wireless robot with ht12d/e and l293 ic and i have used two type of motors. first motor(plastic geared) was working ok with l293(i.e it was working at 1A) second motor(johnson geared ...
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1answer
102 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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1answer
29 views

How can I set up a chained DAQ system with small off the shelve boards? [closed]

I'm building an exoskeleton in a student team and we're having some trouble finding the right prototyping system for our electronics system. All of the shelve systems are either too slow or too big. ...
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3answers
165 views

Gas engine on a robot: Is is possible? Is it a good idea?

For a college project, a group of us are trying to design a remote controlled snowblower. We want to go with a battery and a gas engine basically like a car. Our logic for this was batteries wouldn't ...
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3answers
145 views

What motor type is better suited for instant torque supply

I am working in a robotics project and I am looking way to make my robot "dash" as soon as possible. Therefore I need to have a quite high acceleration for a brief time. To be more specific, I am ...
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1answer
72 views

Find the right motor to lift a robot's arm

I'm trying to find the right DC motor to lift a robot's arm. I know the total weight of the arm, its length, and its center of mass. The motor only needs to lift the arm up about 45deg. How exactly I ...
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1answer
115 views

Voice controlled robot [closed]

Suggest me book name or link to study for voice controlled robot (DSP on matlab for voice recognition). What is the hardware module/ sensor for voice recongnition?
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1answer
67 views

Large RF robot network

A friend of mine asked me to help with thinking about a solution to create a RF communication between 8 robots and 1 access point. Not a lot of traffic, just to signal that the robot is (almost) at ...
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1answer
109 views

Absolute encoder or Incremental encoder?

I'm planning on making a robot whose exact location can be tracked, which would be appropriate to use-- an absolute encoder or an incremental encoder and convert the number of rotations to distance ...
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2answers
324 views

Can someone explain the battery management schematic for the following robot?

This seems like a good start to build my own battery management system. Can someone explain how exactly is this circuit working? See link for full size image. Link to Full Size Image Link to Robot ...
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0answers
82 views

building a remotely controlled remote controlled car :) [closed]

I am a newb to EE (I am a web developer). My friend works remotely and this is what I would like to accomplish: Build a web interface like this: When he visits this interface from a remote ...
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2answers
86 views

embedded programming flashing program

Hello All, I'm new to this board and looking for some opinions. I've searched the board a bit and found similar questions but not quite what I'm looking for. I'm looking for some help deciding on an ...
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1answer
74 views

Gyro-based mechanical stabilization in robotics

I'm from a computer engineering background and have a good knowledge about programming microcontrollers. I want to create a small plastic plane that is always kept parallel to ground regardless of the ...
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3answers
435 views

Automatic agricultural robot using 8051 [closed]

I want to build a automatic agricultural robot for my final year diploma project. The basic idea is to program 8051 to drive the robot in a fixed path in farm for ploughing the farm which i am ...
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1answer
93 views

How to adjust or obtain different IR Transmitter's distances?

I would like to recreate a infrared concept used by in the vacuum cleaning robot's charging station. I would like to use 3 infrared transmitters all in same wave length and transmit a synchronized ...
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1answer
110 views

Suggestions for beginner in Robotics [closed]

I am beginner in Robotics.I want to make serious start from scratch with interest but confused from where to start.So can anyone give some suggestions for 1.As a beginner in robotics ,are there some ...
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1answer
526 views

Is there any way I can power my 120-220V AC motor from a battery

I am building a new robot, it's a little bit heavy, so it's hard to find a motor that can push it. I am thinking of a way to use machines at home (I have two options: Automatic hair drying machine and ...
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2answers
991 views

What is the scope of Electronics Engineering in Robotics/Automation? [closed]

I am beginner in Robotics .I have taken admission for Electronics engineering one year back as we hardly have specifically Robotics Engineering Branch in my Country.Now,I am suffering from questions ...
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3answers
66 views

Is it possible to run 2 motors independently with USB?

Is it possible to run two motors independently in both directions with usb using no microcontroller but just some discrete components? I'm trying to create the cheapest possible robot that can just ...
2
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1answer
196 views

Robotics Experts: How to do trajectory planning for a robotic arm

I have a homemade 3D printed prosthetic robotic arm similar to the picture below Right now this is completely open loop control system. The elbow, wrist and base can only rotate in around its ...
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1answer
116 views

Is this sequential function chart correct?

I have to draw the sequential function chart of a robotic arm which in the beginning of a process is in the position A. If it gets an impulse from the sensor S1 it moves to the left and for 5 ...
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1answer
220 views

Capacitor Charging

Just a quick question, because i want to know if its possible. My son asked me if a kind of light harvesting robot could be made. That roams around, finds light, then charges, then runs around again....
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1answer
85 views

What would be the best microcontroller for running PID calculations? [closed]

I need a microcontroller for my line following robot. Which one would be the best considering a price below $30 and preferably >120MHz clock?
2
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1answer
166 views

Questions About Wiring High-Power Robotics Motor Chassis

I recently ordered a Wild Thumper 6WD robot chassis to build for a school robotics club project. I've built smaller, simple robots before, but I haven't built one with such high power requirements ...
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1answer
718 views

Connecting multiple servos for a robotic arm

i am computer programmer and its really been long since i have done electronics. I need help on connecting my servos to an arduino to power my robotic arm. This is the robotic arm that i am trying to ...
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1answer
210 views

How can we increase the range of a line sensor to make it work as a proximity sensor?

Basically, I have this line sensor. It is designed to distinguish black and white lines. It detects white surface and gives me digital 1 as output and 0 in case of black. But the surface need to be ...
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2answers
199 views

Components needed to determine position in 3 dimensions?

I'm trying to make a quadcopter using an arduino as a base. I've read on some physics involving determining pitch, yaw and roll and it seems like I'll need a gyroscope and a accelerometer. However, it'...
3
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3answers
123 views

Selecting digital componentry in bulk [closed]

There are a ton of electronics retailers and suppliers on the internet, all selling components at (essentially) retail prices. But when big companies need to use digital components (batteries, cameras,...
2
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1answer
74 views

PWM or switch port programmatically for Servo

Is there a huge difference between using a PWM and switching a port through a program (like using switch) for operating Servos? For smooth movement is PWM necessary or switching using a program will ...
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1answer
348 views

Explanation and usage of LM324

I am trying to make a line follower robot using LM324 as comparator, but I cannot understand the theory or the explanation of this circuit. I also don't know how to calibrate it with the IRs.
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2answers
763 views

Powering a DC car vacuum cleaner with a brushless motor for better performance?

I'm making a self autonomous vacuum cleaning robot for a project and I need a vacuum cleaning mechanism to install on the robot. The problem I'm having is with figuring out how to make the vacuuming ...
4
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2answers
603 views

Robot following you; what's the best way?

I built a human-sized robot that can follow anyone wearing an IR beacon. It works quite well indoors and it's quite precise, but outdoors it is completely blind due to sunlight infrared. I have a ...
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1answer
229 views

Trying to figure out how to solar power an embedded device

I have an Arndale octa board which itself needs 5V 3A power supply. Then I have four (4x) DC 5V motors and a 5V servo, and a number of other peripheals. So I think 5V 5A is safe to assume? I want ...
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1answer
163 views

Vex 393 motor with 12V supply

Have a Vex 393 2-wire motor and I'm using a 6-40V PWM driver @ 5A max. My question is this... The Vex was spec'd at 4.8A stall current and 0.37A no-load current at 7.2V. From what I've read here ...
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1answer
249 views

Servo doesn't move when driven by a PIC micro controller [duplicate]

I have a PIC12F629 and a servo sg5010(for which I could not found any datasheet ) So I built this circuit : simulate this circuit – Schematic created using CircuitLab The LED is for ...
2
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3answers
2k views

How to make two motors spin at the same speed?

I am currently using two identical motors to drive a robot. The motors are both controlled using relays but one of the motors is spinning faster than the other. How can I slow down the faster motor ...
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1answer
98 views

Is it possible to use 2 relays instead of a DC motor controller?

I have been for motor controllers to control two 12V motors that have a stall current of 130A and at max power (expected operation) will draw 68A. I am having trouble finding low cost motor ...
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3answers
2k views

Is It Safe To Apply 24V Across a 12V Motor?

I am trying to determine if it is safe to apply 24V across a 12V rated motor. I am working on a robot that weighs approximately 150lb and has a friction intensive drive system. I believe the motors ...
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1answer
81 views

ARM microcontrollers for robotics [closed]

I have been working on ARM9 microcontroller LPC3141 until recently, but I am wondering if there are any better and newer ARM microcontrollers more suitable for robotics. ADD: Are there any general ...
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2answers
878 views

GPS positioning for quadcopter

I am an engineering undergraduate student. I am currently working on a project to implement a sensing package on a quadcopter for the deployment in the canopy of tropical rain forests. This package ...
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1answer
111 views

Identifying this “Transistor”, in this particular circuit [closed]

I'm in FIRST robotics, and I've been helping with our robot over the past few weeks. Every robot (in FIRST) is required to have a status light, which is fancy-ily connected to some other gear. ...