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Questions tagged [robotics]

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15 votes
8 answers
5k 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 ...
Barry Staes's user avatar
13 votes
13 answers
12k views

What can I use to detect pinpoint location (inches) outdoors?

I am getting back in to EE after some time so please excuse my ignorance. I am looking for a way to detect pinpoint location outdoors to navigate a robot for a project with my sons. Is there a low ...
Jamey McElveen's user avatar
13 votes
3 answers
2k views

Stopping drift in hovering quadrocopter

I will be building a 4 propeller quadrocopter drone at some point. I want to make it relatively easy to fly by getting it to hover still when the controls are not touched. Can someone offer some ...
Bojangles's user avatar
  • 1,006
11 votes
2 answers
2k views

Unit testing AVR assembly language

How do you unit test your assembly code? I'm working on a serial servo controller as part of a hexapod robot project and the code has got to the point where it's becoming complicated ;) Anyway, I'm ...
Len Holgate's user avatar
  • 1,078
10 votes
3 answers
3k views

How do I measure the current flow to a component?

I'm building a hexapod robot using simple servos and I was wondering how feasible it was to measure the current flow to each servo (5-6V DC to a maximum of 0.25-1A (I haven't found the spec for the ...
Len Holgate's user avatar
  • 1,078
10 votes
2 answers
2k views

PID algorithm implementation using computer vision

I am constructing an automatic labyrinth maze solver, and using a webcam to control my maze. Based on suggestions in other forums, I am trying to control maze's ball movement at least in one ...
Sai's user avatar
  • 101
9 votes
2 answers
12k views

Methods of filtering noise caused by DC brush motors

I am looking for any information that would help me reduce the power rail noise and EMI of DC brush motors. I am building a robot that is powered by 2 x 250 W 24V DC motors. Thank you in advance
Kamil Zadora's user avatar
9 votes
1 answer
4k views

How to use an ESC

I'm new to RC related modules. Today I got my Hobbywing's Skywalker 20A brushless esc. Manual is here. I also have a brushless outrunner motor (HL3512) I don't ...
David's user avatar
  • 236
9 votes
3 answers
415 views

Measuring force developed by a robot

I've been playing around with a Lego Mindstorms NXT robot, gearing it for speed and power. To my dismay, when geared for power, it wasn't any harder to stop than when geared for speed -- I suspect ...
Clinton Blackmore's user avatar
9 votes
1 answer
577 views

What are good materials and associated tools for a robotics hacker?

What is good stuff to quickly build small hobby robots? What sorts of tools do I need to work with those materials? Let's assume we already have the electronics parts listed at "What is a general set ...
8 votes
9 answers
821 views

Robotics Events

I'll be putting on a robotics competition in a month, and would love to see a list of different sorts of events I might be able to run. What are the types of competitions you are aware of, at all ...
8 votes
3 answers
753 views

Nitinol: Useful stuff?

I have been considering using Nitinol wire for some experimentation as a component in an autonomous system. My understanding is that it will return to its original, contracted state when it reaches ~...
iklln6's user avatar
  • 155
8 votes
2 answers
193 views

Resources to understand robot locomotion and Gait functions

Recently I have been watching Robert Full's talks on TED. He has some obscenely interesting works on robot locomotion. This has intrigued my curiosity and I have been trying to understand his works. I ...
7 votes
8 answers
324 views

Robot picking a person from other objects

I need some ideas of sensors to use so my tank can drive towards humans and seek them out. Distinguishing them from the background. Assume the human is standing still / quitely Any ideas? looking ...
user337's user avatar
  • 361
7 votes
4 answers
2k views

Strategies for mapping an area perimeter with a mobile robot

I'd like to build a bot that when placed in an area would have the ability to find the perimeter of the area and map the obstacles present. Later it should be able to navigate to different parts of ...
James Cadd's user avatar
7 votes
1 answer
783 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 ...
capcom's user avatar
  • 5,912
7 votes
0 answers
4k views

Affordable stereo vision camera for industrial applications? [closed]

I am looking for the best value stereo camera for use in an agricultural vision control application. Since all the vendors do their damnest to hide the cost of their equipment, it's proving to be ...
mathrick's user avatar
  • 239
6 votes
2 answers
6k views

Multiple Ultrasonic Rangefinder Question

I've been doing some research on ultrasonic range finders as sensors for robotics. I've seen them being attached to servos and pivoted to effectively "look" in front of the robot and make sure the ...
JonathonG's user avatar
  • 341
6 votes
4 answers
3k views

How can a PHP programmer go to robotics

I am a PHP programmer with basic knowledge of c/c++ and electronics. But i have keen interest in robotics and AI. What are the basic things that i need to learn before switching to the robotics ? ...
Chetan Sharma's user avatar
6 votes
2 answers
2k views

How is this motor on a Romotive controlled?

I have bought a Romo Robot by Romotive. Unfortunately I'm having some technical issues(it does not work, at all) with it so I decided to explore the PCB a bit and see what its made of. I understand ...
6 votes
2 answers
227 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, ...
HeineyBehinds's user avatar
6 votes
2 answers
2k views

Join two pipes with independent rotation?

I'm planning to build a table tennis robot using an Arduino controller for the location/placement logistics and control, but I'm stuck on one physical detail and don't know where else to ask. I want ...
Dan's user avatar
  • 163
6 votes
1 answer
1k views

Drive 4 DC motors off a dual drive motor controller

I'd like to build a 4-wheel skid steer robot. I have selected this motor and this motor controller. The motor controller can handle a 10A draw and has the ability to operate over serial TTL and give ...
S73417H's user avatar
  • 163
5 votes
2 answers
915 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 ...
Zipporobotics's user avatar
5 votes
3 answers
466 views

Where can I find good examples of analog insect-like robots?

Years ago, I saw a program on TV about this guy who spent his free time building analog robots that looked and behaved very much like insects. I've been trying, without success, to find that or ...
Saeed's user avatar
  • 53
5 votes
1 answer
356 views

Indoors-vs-outdoors sensor

What a near-perfect-accuracy yet dirt-cheap way for a drone or other miniature embedded computer to sense whether it's indoors vs outdoors? Some ideas: Geo position sensor if small, low power, and ...
AlcubierreDrive's user avatar
5 votes
2 answers
2k views

Electronically controlled pneumatic lift, or something similar

Need to be able to firmly lift about 110Lbs (~50Kgs) weight, through a distance of upto 12 inches. The weight can be considered to be a flat & square wooden board, hinged to a flat platform, with ...
bdutta74's user avatar
  • 3,534
5 votes
3 answers
50k views

How to have an Arduino wait until it receives data over serial?

So I've wired up a little robot with a sound shield and some sensors. I'm trying to write a sketch that will let check the sensors. What I'd like for it to do is print out a little menu over serial, ...
SonicDH's user avatar
  • 103
5 votes
2 answers
1k views

Money Counting Machine

At the moment I want to build a machine that counts money (money counter machine). When the user puts in the money bills, it will scan them, count them and send the results to a program running on a ...
kap's user avatar
  • 61
5 votes
1 answer
612 views

Robot Encoder Position

I've been using a Motoman and I'm wondering what is the best way to recover when the encoder position has been lost. I've tried lining up all the reference marks on the joins but this can be a bit ...
user337's user avatar
  • 361
5 votes
3 answers
3k 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 ...
capcom's user avatar
  • 5,912
4 votes
3 answers
909 views

3pi Robot with Bluetooth

I want to use bluetooth to grab the info off my 3pi rather then have it display on the small LCD. Pololu provides a lib for serial communication. I'm wondering what the best bluetooth/serial module ...
SaM's user avatar
  • 902
4 votes
3 answers
4k views

Which servo motors for a precise but not powerful robotic arm?

I've just got into electronics with an Arduino explorer kit from Oomlout and I have learned a lot about electronics so far, but now I want to start my first proper project. A robotic arm. It should ...
Ell's user avatar
  • 325
4 votes
5 answers
381 views

Primitive navigation system

In my spare time I've decided to create something on my own. I've never designed difficult things, but I'm very curious, moreover experience would never be useless ;) I decided to create a robot, but ...
PF4Public's user avatar
  • 654
4 votes
2 answers
803 views

How easy is it to develop hardware to run Microsoft Robotics? [closed]

What do I need to develop hardware that can run embedded software developed with the Microsoft Robotics studio? I thought only certain high-end off-the-shelf robots that support embedded Linux were ...
Edward's user avatar
  • 1,339
4 votes
3 answers
3k 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 ...
Kolban's user avatar
  • 319
4 votes
2 answers
3k views

Underwater Distance Sensing

I'm looking to measure distances from a submersed robotics project in the range of 1 to 20 feet (around there at least). However, the only options I seem to come across are rather heavy sonar modules ...
wcmartin's user avatar
  • 641
4 votes
2 answers
2k views

Builiding a catapult that runs continuously with a motor

I need some ideas for designing a catapult that runs on a motor. Basic requirements: able to launch a cookie 30m, capable of continuous operation, fits within a 0.4 m × 0.6 m × 0.4 m high box, allows ...
user avatar
4 votes
1 answer
829 views

Suitable processor for a Robocup Junior Soccer robot?

Last year, I entered into the Robocup Junior Soccer competition using a robot built from the Lego Mindstorms NXT kit. It worked well, but we were thrashed at the international level, mainly because of ...
Eric's user avatar
  • 1,073
4 votes
1 answer
90 views

Mechanisms of a mobile robot

what is the need of the upper wheels in the figure shown?
Millie's user avatar
  • 141
3 votes
2 answers
417 views

Is Axial Gap (pancake) motor better for servo drive applications?

I heard from someone that axial gap /pancake motors (lynch or etek) are better for servo control (speed and position) than standard radial flux DC motors. Both motors are brushed type. I don't ...
ElectronS's user avatar
  • 3,239
3 votes
2 answers
792 views

How lenient can I be about motor stall current?

I'm thinking of using two of these motors with this motor driver. However, one thing concerns me: the stall current of the motor is 3.3A, and the motor driver has a peak current output of 3A. The ...
Eric's user avatar
  • 1,073
3 votes
2 answers
601 views

microsoft robotics: cheap but very extensible robot?

Is there any cheap and very extensible robot kit, which can work with Microsoft Robotics? I want to have a great choice of cool parts for a robot to buy :) If where is no such robot kit which can ...
user224's user avatar
  • 141
3 votes
1 answer
1k views

Can i use ATmega8L instead of ATmega8?

I am recently doing a project on robotics.And am following (societyofrobots) 50$ robot tutorial for that purpose.But i can't find ATmega8 chip anywhere as they told but i did found atmega8L instead....
saiful103a's user avatar
3 votes
2 answers
223 views

What type of electronics is typically used to interface between PCs and custom hardware? [closed]

I have tried to make this question acceptable for StackExchange, I am not looking for buying advice, just either examples of hardware that could have been used or the name of types of devices I should ...
B.Baker's user avatar
  • 85
3 votes
2 answers
6k views

How accurate are altimeters?

I'm building a quadrocopter and would like to prevent drift using a down facing camera. To do this properly, I need to get the height of the drone from the ground. Obviously the ground can vary, so ...
Bojangles's user avatar
  • 1,006
3 votes
4 answers
462 views

Suitable motor for robot

I'm planning on building my first robot using an Arduino. It's going to be a small obstacle avoiding robot powered with a 9V battery. What should the voltage of the DC motor used in the robot be? Also,...
gomek's user avatar
  • 465
3 votes
2 answers
2k views

Simple Robotics to do with teenagers

I am trying to get a robotics club started in my school. But I am wondering if I started what could I get the kids to make. They would be aged between 14-18, some with electronics knowledge. So I need ...
Dean's user avatar
  • 8,458
3 votes
3 answers
145 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,...
smeeb's user avatar
  • 797
3 votes
2 answers
9k 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 ...
user2552922's user avatar

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