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0
votes
0answers
14 views
Need to select a servo motor with 40Nm torque [closed]
I need to build an arm which has to lift a load of 10kg at a radial distance of 0.4m....
The speed of the motor could be anything but as low as possible....
If a single motor can't have this ...
0
votes
0answers
24 views
tower pro mg 996r dg high torque 180 servo controling with arduino [migrated]
we are trying to control a robotic arm using the tower pro mg 996r dg high torque 180 servo. at first we tried to power the servo from arduino's default 5v. but it didn't work, then we power it from ...
0
votes
3answers
97 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 ...
0
votes
2answers
98 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 ...
0
votes
1answer
50 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 ...
-2
votes
1answer
87 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 ...
3
votes
1answer
82 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 ...
0
votes
1answer
28 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. ...
0
votes
3answers
135 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 ...
0
votes
3answers
128 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 ...
0
votes
1answer
57 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 ...
-3
votes
1answer
101 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?
0
votes
1answer
66 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 ...
1
vote
1answer
84 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 ...
0
votes
2answers
246 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 ...
3
votes
0answers
79 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 ...
1
vote
2answers
76 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 ...
0
votes
1answer
67 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 ...
1
vote
3answers
404 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 ...
1
vote
1answer
81 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 ...
0
votes
1answer
102 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 ...
0
votes
1answer
375 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 ...
2
votes
2answers
629 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 ...
0
votes
3answers
62 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
votes
1answer
176 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 ...
0
votes
1answer
94 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 ...
1
vote
1answer
206 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 ...
-5
votes
1answer
82 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
votes
1answer
148 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 ...
0
votes
1answer
606 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 ...
0
votes
1answer
155 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 ...
0
votes
2answers
193 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, ...
3
votes
3answers
122 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, ...
2
votes
1answer
70 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 ...
0
votes
1answer
286 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.
0
votes
2answers
620 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
votes
2answers
572 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 ...
0
votes
1answer
201 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 ...
0
votes
1answer
147 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 ...
0
votes
1answer
230 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
votes
3answers
1k 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 ...
1
vote
1answer
94 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 ...
0
votes
3answers
1k 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 ...
0
votes
1answer
77 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 ...
3
votes
2answers
815 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 ...
-1
votes
1answer
105 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. ...
1
vote
0answers
138 views
PD control (PID without I) - Homework help
I've been given a system -
x" = bx′ + kx + ru
and I've been asked to rewrite it in the canonical form x' = AX + BU.
I've got --
...
0
votes
3answers
1k views
Serial connection between Raspberry Pi and Roomba
I have a Raspberry Pi with this FTDI cable and a Roomba 560. The Roomba has an SCI port to allow for control of the roomba via serial. I installed the PySerial library on the pi and send valid ...
0
votes
2answers
166 views
Using srf05 ultrasonic sensor to detect changes only
I am using the SRF05 sensor to detect distance, so far so good. Now we need to detect only changes, which means, the sensor will have some close object to it, but ...
1
vote
5answers
3k 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 ...
