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3answers
110 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
33 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
73 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
69 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
125 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
49 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 ...
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1answer
55 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
45 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
121 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 ...
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1answer
69 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?
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1answer
65 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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0answers
34 views

Reaction vs Rotary torque sensor for force/impedance control

I am working on a robotic system that is requiring a torque feedback from a rotational (single axis) joint for a force or impedance control loop. When researching the available torque sensors I've ...
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1answer
96 views

control circuit of a humanoid robot (something like i-cub or Asimo)

my friend and I are building the upper body of a humanoid robot for our MSc thesis project. There are 24 dc motors in this robot the thing I want to know is what is the best way to command these ...
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1answer
118 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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0answers
32 views

How to increase the range of this circuit?

I have planned to build a project named Human Detection Robot using the following circuits which are collected from a webpage: Images Resource Post Link: Human Detection Robot But, I got following ...
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1answer
31 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
101 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
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3answers
111 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, ...
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1answer
53 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
150 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
201 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
471 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
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1answer
122 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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0answers
35 views

Video guidance system for 3pi robot to PC

I am currently working on a graduate project. It aims to build the guidance video system from 3pi robot. The video input would determine the types of action that the robot needs to executed. I'd like ...
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1answer
63 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
138 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
331 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
66 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
371 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
62 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
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2answers
571 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
86 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. ...
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0answers
121 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 -- ...
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3answers
699 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 ...
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2answers
109 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 ...
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3answers
1k 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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1answer
347 views

How to get input voltage of 5 and 6 volts

I have an interesting problem in building something with robotics. I am using a PIC16F877A micro-controller to control the robot. The motors of the robot require 6 volts and the PIC requires 5 ...
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1answer
854 views

Using a FTDI to USB adapter with a raspberry pi and a roomba [closed]

I'd like to control a Roomba 560 using its 8-pin mini din SCI port. I've seen other people do this successfully but I'm still unclear on how exactly to go about this. I was planning on using an USB to ...
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2answers
1k views

How can we use a usb(in a laptop) for general purpose input/output operations, such as robotics control [closed]

How can we use a usb port (in a laptop) for general purpose input/output operations, such as robotics control?? I want to control an external hardware such as a robot or say simply an array of LEDs ...
2
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1answer
125 views

What does this Op Amp circuit do in this circuit for a line following robot?

I have seen a schematic for a line following robot, but there is something that I can't understand and is shown in the figure below, what is the purpose of the Op Amp circuit? I know that BREAK input ...
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1answer
3k views

How do IR sensors detect color? [closed]

I'm trying to make a line following robot using Arduino. I have searched the Internet for information on how to build it, but a few questions remain: How does an IR sensor detect colors? What ...
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1answer
111 views

Gear ratio reading [closed]

I've ordered a little cheap kit of gears from Tamiya with multiple possibility os gear boxes to test. But I'm wondering how to read the value of the ratio as I'm not sure I've understand it quite ...
0
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1answer
232 views

Arduino multiple serial module usage

I'm stuck at this seemingly simple thing. I have a NMEA GPS module. It doesn't matter how it operates, it just transmit serial data stream at a baud rate of 38400. I have an arduino Mega which has ...
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2answers
95 views

Behavior Based Robotic

I was reading this book which talks about behavior base robotics. Since it uses IC for programming at some point it uses a function called startprocess(). After looking through the web I could not ...
0
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1answer
431 views

Using Arduino, how can I dynamically change signal input from one pin to another?

Background I am building a multirotor project similar to this one I built a few months ago. This particular multirotor will be geared for flying FPV (First Person View) which means that I will ...
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3answers
228 views

Iphone wireless communication without Wifi? [closed]

I am working on a robot that I would like to control using an Iphone app that I am creating. The problem I'm facing is that the robot will be operating in areas where there will most likely be no ...
2
votes
1answer
578 views

How to make a circuit to run DFRobot with a Netduino

So I ordered a DF Robot kit and got some help to put it together. I want to control the wheels with my netduino. What I want to do is simple. Press the netduino's button, and start the 4 wheels in ...
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1answer
432 views

Waterproof sonar?

I'm building sensors for an underwater robot and was wondering if it's possible to waterproof ultrasonic range finders like this one to work underwater. I have made waterproof enclosures before. ...
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3answers
1k views

Controlling Microcontroller using Visual C# [closed]

I'm building an ROV which I will program normally with C but I want to control the microcontroller from a PC using a program written in C#. So for the ROV, the microcontroller will be controlling it ...
3
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1answer
311 views

Replacing a Wired Controller with an Arduino Uno: Relay Alternative

So, I have a simple robotic arm that has a wire controller you plugin into it. The controller has 8 pins. I haven't played with it too much but I know that the far ends are power sources and the ...