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0
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0answers
27 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 ...
0
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1answer
21 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
69 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
105 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
34 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
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1answer
57 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
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1answer
74 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 ...
0
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0answers
23 views

Pass sensor for robots

I would like to add a sensor to my robotcar. I would like to know when the robot enters to a room. One solution would be an infrared barrier, however I cannot add active sensor to the doors but I can ...
4
votes
2answers
442 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
98 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 ...
1
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0answers
27 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 ...
0
votes
1answer
48 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
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1answer
112 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
206 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
57 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
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3answers
211 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
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0answers
26 views

What is JTAG TCE signal designed for and what effect does it have on the boundary scannable IC?

I know for fact that some boundary scannable ICs don't have this JTAG TCE input signal but some does. Does any one know why?
0
votes
1answer
53 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
445 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
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1answer
82 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
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0answers
108 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
459 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
77 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
3answers
587 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 ...
1
vote
1answer
242 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 ...
1
vote
1answer
491 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 ...
0
votes
2answers
597 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
votes
1answer
111 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 ...
-1
votes
1answer
2k 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 ...
-1
votes
1answer
80 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
votes
1answer
176 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 ...
0
votes
2answers
91 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
votes
1answer
380 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 ...
1
vote
3answers
180 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
397 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 ...
3
votes
1answer
331 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. ...
-1
votes
3answers
816 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
votes
1answer
276 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 ...
1
vote
0answers
355 views

Raspberry Pi vs Arduino ADK (with phone tethering)

I was doing some research for my capstone project next year. Basically it is an autonomous rover, designed to scout out outdoor areas and send back video/pictures to a website. So far, our initial ...
2
votes
1answer
190 views

Winch or regular servo

I am trying to build a robotic arm and for the base I need a servo with a lot of torque. After browsing through hobbyking's servo selections I noticed that winch servos offer a higher torque for ...
6
votes
1answer
190 views

Powering sub-sytems on a robot with a single battery

I am making a robot for a project, and have a quick question about the power system for my robot. I have to power an AVR MCU (5V), 6 servos (also 5V), 4 dc motors (12V), and a camera (9V). I really ...
0
votes
2answers
306 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 ...
-1
votes
3answers
246 views

Information delivery through zigbee

I am doing a project in which i have to measure the voltages of a given terminal and send it to other distant system through zigbee. My work plan is like this: I will use an arduino board and measure ...
15
votes
8answers
1k views

Microcontroller/cpu for fast trigonometry in robot?

This concerns hardware that does weighs little, because a (fat cat sized, 6 legs with 3 DOF) walking robot should carry it around. Because of that walking it'll need to do a lot of trigonometry (using ...
4
votes
3answers
349 views

Communicating via USART with an AVR - Input Buffer?

I am currently building a robot (as some of you may know from my previous questions). The current task I a dealing with is that of communication. To keep things simple, assume I have 5 commands to ...
2
votes
2answers
142 views

Wireless communication with robot

I am making a simple robot, and am using a relatively cheap RF transmitter and receiver to send commands to my robot. Essentially, the transmitter end would send data from an AVR MCU via its UART to ...
-2
votes
1answer
110 views

TI ARM with stacked RAM

Do any of the TI ARM SOCs, e.g. OMAP or Da Vinci, have a version with stacked RAM? (e.g. DDR2 or mDDR) For miniature robots, it would be really nice to not need to spend board area on an external RAM ...
-2
votes
1answer
347 views

How can an experieced programmer get into embedded programming and robotics [duplicate]

Possible Duplicate: How to become an embedded software developer? I would like to know what is the best method to begin learning embedded programming and electronic skills? I am already ...
2
votes
1answer
1k views

Selecting a GPS module for a mobile robot [closed]

I need a GPS module to include in my quad-copter for providing GPS based navigation. I found there are many GPS modules available, and there are different kind of information available in their specs. ...
5
votes
2answers
116 views

Inspection/QA Criteria for Selling Electronics?

I'm a software developer who has recently taken up a penchant for home electronics and personal robotics. I'd like to start building a prototype for a small device that I would sell though a website, ...