Let's Make Robots!

Servo

Walk, Push ups, Navigate with ultrasound
Using a
Update: 03 May 2016  [Added video of push-ups and sonar test]   ---------------------------------------------------------------------- Hi everyone, I am … Read more

Servo recommendations

Can anyone recommend a strong servo compatible with Arduino? Ideally I'm looking for:

  • Speed
  • Torque
  • Compatible with existing libraries

I'll have a separate power supply, so the voltage isn't too important.

I'm a newb, so any thoughts/recommendations appreciated from those with experience.

shocking servo

I'm trying to control a servo with a joystick.

I first tried to just make the servo turn by sending it to a position, waiting a bit and then to another position.

 

Now I tried to change the on pulse with a joystick.

But the result was not so good. The closest I got to making it work, my servo shock every second.

Anyone who can help me out?

Servo motor power source

For a project I need to make my teacher advised me on using a servo from parallax

https://www.parallax.com/sites/default/files/downloads/900-00005-Standard-Servo-Product-Documentation-v2.2.pdf

According to the datasheet I shouldn't connect it to the Vdd and Vss from the microcontroller.

Would it be ok if I would it on the same power source (being my batteries) but my controller gets 5V from a regulator and my servo would be getting 7.2V directly from the batteries. (could also lower it to 6V)

Servo problem

I'm suffering a a bit of grief and a bit baffled why ....

 

Jetduino: Robotics interface for NVIDIA Jetson TK1

I have been working on a new interface board for the Jetson TK1 embedded supercomputer called the Jetduino. It makes it very easy to build robots that can use the parallel processing capabilites of the NVIDIA GPU for vision and neural neural networks.


1 second delay with NRF24L01 servo control

Hi,

I am building a Project which targets to:

Driving the Car with Steering Wheel connected to PC.

PC connected to Arduino which will transmit the Steering wheel commands to other Arduino via NRF24L01 modul.

On Car Side:

driving my hexapod servos using STAMP and PSCU

Hi - I'm coming back to Stamp after quite a while away, and obviously a lot has changed! - but what has not is my being an ignoramus !

I'm working with an old Propeller Servo control unit (PSCU), which I'm just starting to find my way around coupled to my trusty stamp board of education (Incidental to my question does anyone know how I can get another? - looks like this little chap is discontinued )

Problems with TowerPro SG90 servos and Pololu Mini Maestro 24

Hi all,

I am in the process of connecting up 18 Tower Pro SG90 servos to a Pololu Mini Maestro 24 controller to complete my build of a Plen 2 (Custom redesigned to fit the above servos and allow space to carry the controller).

I am using an adjustable power supply that has voltages of 3, 4.5, 6, 7.5, 9 and 12vdc.  The label says that the output is 300mA 3.6 VA max.  I am suspicious this could be my problem detailed below.

Powering SG90 servos with lipo and BEC

Hi there,

I'm building a robot with 15+ SG90 micro servo's.

To power it, I've bought a 2C lipo battery, and a 5/6 volt BEC.

I've hooked up the BEC's 5v (red) to all the servo's red, and the BEC's ground to the servo's ground, as well as some arduino grounds (that control the servo).

The BEC has an on/off switch.  When the BEC is switched to off, and I plug the battery into the BEC, a surge of current flows through to the motors.  They all "twitch" very rapidly, and I've had some wires melt/smoke.

My questions are:

Control DC motors with a Grove H-Bridge and DynamixShield

I just uploaded a new video tutorial on how to use the Grove dual H-Bridge module with the DynamixShield and an Arduino Due to control DC motors. 

Grove H-Bridge with DynamixShield

Servo powering problem

Hi guys, me and my friend have built an arduino controlled Quadruped "mantis" robot.

Video tutorial on wireless XBee serial with the Due and DynamixShield

I just uploaded a new video tutorial on how to perform wireless communications using Grove XBee sockets with two Arduino Dues and the DynamixShield. This is part of my Kickstarter campaign to get the DynamixShield produced commercially. It lets you control smart and regular servos, and has tons of Grove and RobotGeek connectors, all in one shield.

Trouble with servos!

I’m working on a robot that’s supposed to place dominoes in a track. As part of the design, there’s an arm that grabs and places the dominoes.

Humanoid concept Arduino

This concept to make a humanoid head, that speaks like a human, chooses phrases randomly. As (it) speaks , it moves head, eyeballs and eyebrows randomly in an emulation of a human. This can be useful for lonely people who cannot have a pet at home.

This is the basic idea..Later it is possible to develope it further to talk longer durations, and even tell short stories stored on an SD card.

help needed. looking for somone local to Phx, AZ - 2 servo's, controlled via wifi

i'm trying to develop a device that is controlled with 2 servo's. i want the servos to be controlled independently over wifi with either a joystick or c# application. i have the project started with the following. i am looking for someone to help me complete this project, 

c# applications

Audrino uno

cc3300 wifi shield

Audrino 1.0.5-r2 sketch pad

2 Futaba s3305 servo's

DC 5V Stepper Motor 28BYJ-48 + ULN2003 Driver Test Module Board for Arduino

 

 

Motor control or servo control

 

I came across this circuit on google. It controls motor speed by simple flip-flop that gives a PWM signal.

The question is can this be used as a servo control ?

first use 5 volts supply instead of 12 volts ...then by replacing the 3RD NPN transistor with a servo. the + goes up, the - goes down and the signal feeds from the flip flop...can we do that ??

Trying to encapsulate a servo instance, no movement

Hi there,

I'm having an issue with encapsulating servo functionality in its own class. What I want to do is creating a class that contains a couple of methods that control a servo more or less autonomously, in such a way that just requires me to set the context and then in the loop calling myservo.update() to have the myservo class take care off its own. Very OOP indeed :-)

For some reason I just can't get it to work. Brought down to the bare minimum, I have three source files, main.ino (off course), myservo.h and myservo.cpp:

myservo.h contains this:

Dagu Robotic Arm 6DoF - Bacuri02 Project

I recently received my Dagu Robotic Arm 6 DOF with Arexx control board 32 servos.

My original project is to use an Arduino Mega to control the arm and then make a wifi connection joystick control.

As I have not received my Arduino Mega board, I started tinkering in Arexx control board that I received along with the robotic arm. Along with the kit also came with a CD ROM which I believed the program to be installed on the computer to control the arm.

Biped Howto: Moving servos

+++ UPDATE (12-march-2014): Rename title as "Biped Howto".

Hi, I will try to explain, in a very simplistic manner, the way in which servo motors can be controlled.

Servo motors are controlled by a PWM signal, in which the active part of the signal (known as duty cycle) define the amount of degrees the servo will rotate.

raspberry pi arduino,

So im pretty newish to robotics and programming in general, but ive done some reading and have started down my own path.

my robot(including a picture, description, wiring diagram and code) is posted here http://letsmakerobots.com/node/40350

Starter Robot Question

Howdy! I've been working on my "Start here" robot. I've not yet got a distance sensor (I am instead using a light sensor to take two readings moments apart, generate random numbers from them, and then compare those two so as to travel at random.) I do have a servo, but I have been enjoying having it play sounds through a speaker. Now, that being said, I'd like to hook up the servo, but A.) don't have the 330r DIL chip, and B) don't want to take out the darlington. 

Arduino Servo library and softwareserial library conflict

Hi,

I need some help for this.

I am using arduino UNO and i have connected a GPS to softserial and a servo to pin9 and when the software runs the servo and softserial fights. I check online about the issue and it happend to many people and still i am unable to get a solution for. 

I even tried almost all combinations of solution from internet and it did not work. When this happening some times servo works and other times GPS works. 

hope to get some support

Robot Servos/control board advice

Hi, I would like to do an investment and to buy some servos (10/20 units).

I don't have too much money to spend, so I'm looking for cheap servos with however enough torque to do some interesting robots (humanoid, arm, hexapod, etc).

Initially I found MG995/MG996R servos, then I found rds3115 robot servo.

The features of the rds3115 are:

modified servo .. continious rotation problem

Hi all ... have a little problem with a servo i modified for continous rotation 

#include <Servo.h> 

  Servo myservo;  // create servo object to control a servo 

  void setup() 

  myservo.attach(9);  // attaches the servo on pin 9 to the servo object 

  void loop() 

Few questions about Spider Controller (DAGU)

Hello all!

I'm newbie and I have few questions about Spider Controller (from DAGU).

1) When USB is plugged and the battery is plugged too - which source of power controller will be use for servos?

2) As i understand, If i use analog servos I should plug it to PWM-outputs. And digitall servo can be plugged to any output. Am i right?

3) Can't understand what is the role of ON/OFF switcher. It is for battery only?

 

Many thanks in advance.