Questions tagged [servo]

A servo is a motor, commonly used in robotics projects. This tag is for questions about the servo motor when using it in robotics and other projects.

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Rpi python GPIO PWM Controlling Digital Servo JX 5521MG Problem

I ordered a digital servo JX 5521MG to use with my Pi but when I use the code below the servo does not move but there is a slight tick or twitch inside. gpio pwm-ms gpio pwmc 192 gpio pwmr 2000 ...
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359 views

Combination of ServoBlaster and wiringPi won't work

I would like to control a servo and a dc motor. I want to control the dc motor's speed by using pwm with a frequency >= 1000 Hz. The servo on the other hand expects a pwm frequency of only 50 Hz. So ...
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0answers
43 views

How to make servos not jitter without extra hardware [duplicate]

To control a servo, I'm using this. To summarize it: you use code like this: while True: GPIO.output(pin, GPIO.HIGH) time.sleep(0.0015) GPIO.output(pin, GPIO.LOW) time.sleep(0.0185) ...
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873 views

Connect a servo to explorer hat

trying to get a servo controller from my raspberry pi with a piminori explorer hat and servoblaster. When I use one of the GPIO port which connect to the LEDs and touch with the yellow control wire of ...
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1answer
1k views

Questions about wiring raspberry, l298n, SG90 and HC-SR04

I've finished testing and mounting my hc-sr04 and sg90 and now i have to connect everything, but have doubts and questions. Here are the diagrams that show what I am thinking to do: This one shows how ...
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0answers
2k views

Multiple servo control RPi

I have written the following script to set positions for a single servo. import RPi.GPIO as GPIO import time #set up pin 11 as an output GPIO.setmode (GPIO.BOARD) GPIO.setup (11, GPIO.OUT) ...
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0answers
654 views

Raspberry pi with PS3 Controller

Hi I have used the following code for a specific movement for the servos. In my project I have 3 servos per nacelle (2 nacelles) to control the motions for the bicopter. I want to control the inputs ...
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0answers
509 views

Raspberry Pi with ESC and PS3 Controller

I am new to coding and I am trying to control ESCs through a PS3 controller which will be coded on the Raspberry Pi B+. I think this can be done, but i have read in a lot of places that I need to use ...
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207 views

Ideas for limited camera pan and tilt

I have a number of Pis, each with a camera module attached. I've mounted the cameras on a flat board side by side, but have discovered that there are physical inconsistencies in the camera modules ...
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3answers
11k views

Controlling a continuous servo with raspberry pi

As the title states I want to be able to control a continuous rotation servo and use it as a wheel for my rc car. I have installed ServoBlaster but I can't find any tutorial or example on how to send ...
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2answers
30 views

How to access servos using pins other than GPIO 2&3

I have an adafruit pca9685 16-servo controller. I was using this guide to control it: https://learn.adafruit.com/adafruit-16-channel-servo-driver-with-raspberry-pi/using-the-adafruit-library ...
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1answer
49 views

Should I use an external power supply for controlling 4 servos?

So I have for servos that I could connect to a breadboard and to raspberry pi GPIO 5V pin to power them. But I have read that That is not safe it can damage the pi. Is that true? instead of using ...
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1answer
1k views

Can the GND pin handle 5V?

In many tutorials and guides they use the 5V pin, the GND pin and a GPIO pin to control a servo with a JR-plug. In these guides, they didn't use any other components (I.e. resistors) in between. Now I ...
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2answers
50 views

Servo is jittery and moves back and forth when it should be still

(Sorry about formatting) I am trying to write an opencv program to track the color red. So far it works okay, but the servo is jittery and when the object is still and centre the servo moves back and ...
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2answers
46 views

Grounding with external PSU for servo and raspberrypi

Earlier I had used the USB-C adapter to power my raspberry pi and an external PSU to power the servos. I had to connect the ground of the PSU to the ground of the R-PI so that the control signal from ...
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1answer
223 views

MG 996R Micro servo Using Raspberry

I have a MG 996R micro servo which I am using with a Raspberry Pi and Python. It seems that this servo is not working with Python. I have tried experimenting the values, increasing and decreasing of ...
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1answer
59 views

what servos should I use? [closed]

I want to make a humanoid robot with my pi, but am unsure of what servos I would need. I did some research and found out they a rated in kg/cm, so I calculated the weights they would be lifting, ...
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1answer
194 views

Servo motor keep shaking while using software PWM to drive

Greet everyone, I am using JavaScript with pigpio to develop my learning project. How come my servo motor keeps shaking when I drive it by program PWM? codes are posted as follow: var servo1GPIO ...
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1answer
2k views

Control servo motor using a web server

So I'm trying to get this to work. I have a .py file that turns the servo, and it works, but I'm trying to run it through a browser. So I installed apache and php, and I made .php file which, when ...
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2answers
38 views

MG 996R Servo only works in one direction with pi 4b

I have an MG 996R Servo from DM DIY More hooked up to physical pin 18 of my raspberry pi 4b running python 2.7.16 with GCC 8.3.0 on Linux2. I am powering the servo with an external 5V supply capable ...
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1answer
26 views

Servo control issue

I have written a small program that controls two servos: to start the recording process one servo opens a shutter (servo1), then the second one lifts a sky camera out of a housing (servo2). To stop ...
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1answer
40 views

Servo Controllers, Servos, Power consumption

I'm looking at options for controlling multiple Servos I keep finding the same board, the PCA9685 Which is great, I see people using them for those small 9g servos, but what about servos that pull ...
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1answer
64 views

Running .py code after power supply loss [closed]

I have an interesting problem, I want to mount a camera on the front of a tractor(Sony RX0M2, similar to a gopro). The camera will eventually be used for image processing. A PQ-12 micro linear servo (...
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1answer
429 views

How can Rpi python 3 uses PCA9685 PWM controller to change direction and position of a servo?

I need help understanding the code in the turn.py file, which is a part of the this project, please look #!/usr/bin/python3 # File name : car_dir.py # Description : By controlling Servo,the camera ...
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1answer
160 views

How can you use pigpio to set a specific position for a continuous rotation servo?

Running my code with a normal 180 degree servo will move it to a user-specified angle and then hold it there. But when using a continuous rotation servo, it keeps rotating constantly for 500 <= ...
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1answer
345 views

MGR996R rotation angle

Basically I want to control the angle of the rotation of the servo motor but I don't seem to know how... From the tech sheet I know this motor shouldn't be a continuous one, any hint would be ...
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1answer
52 views

How to connect components of an RC (and rPi) car to the battery safely?

I am building an RC car from scratch. I have a 6v motor with an appropriate mdb, a 5v hobby servo, a raspberry pi zero w, and an 2200mAh 11.1v 50 C battery. I will upgrade the motor to a higher ...
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1answer
2k views

Servo robot with keyboard control

I am currently creating a design project that involves controlling several servo motors for a raspberry pi 3. I want to use a keyboard to control the direction of the motors, and I am using curses to ...
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1answer
292 views

How to control Arduino Uno using Raspberry Pi after image processing is done?

I am working on a project which is basically a robot car to collect garbage after the image in front of it is determined as Garbage (image processing using Raspberry Pi). I want my car movements to be ...
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1answer
532 views

Servo angle control using Rpi and android App

I am trying to control the angle of a servo motor via an Android app that I built, installed on my phone. My phone sends the angle data (i.e. -90 to +90 degrees) to the raspberry pi via a TCP socket. ...
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1answer
195 views

Connecting a servo to a Pi

I'm new to electronics and have run into a problem while trying to hook up my micro-servo to my Pi. I have a Rapsberry Pi model 3 B, a breadboard, a 6V power supply, and a TowerPro MG90S micro servo. ...
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1answer
675 views

SG90 servo is vibrating and heating when I try to control it using Raspberry pi 3

I brought a new SG90 servo and I tried to control it using my Raspberry Pi's pin 17 writing the following code on the terminal's python >>>import RPi.GPIO as GPIO >>>import time &...
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2answers
176 views

Raspberry controlled fraction collector - what would be the best set?

I was thinking about building a self-assembled easy to use fraction collector controlled by raspberry. A Fraction collector is a piece of equipment used in liquid chromatography which has some tubes ...
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2answers
660 views

Problem with usb serial RPI -> Arduino

I'm working on a robot, more precisely on his head which have to track an human face. I'm using a RPI which will detect the face and then send to the Arduino the angles for both servomotors. I ...
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2answers
369 views

How would I control multiple solenoid locks?

I would like to control 16 separate solenoid locks using PWM (It is not imperative that the lock is 12V, it could be 6V for example). The PWM source is this 16-channel servo driver from Adafuit. Is ...
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1answer
2k views

Run servoblaster Python code

lately i installed servoblaster to my raspberry pi and then tried a simple python code ` import os import time os.system('sudo ./servod') while True: os.system("echo 1=100 > /dev/...
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1answer
168 views

raspberry pi3 servo blaster question

I run this code on Python 3 but it gives an error on echo 0, and echo 1. Can any one can correct this? #!/bin/bash #go to starting possition echo 0=60 > /dev/servoblaster sleep 1 echo 1=135 > /...
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1answer
2k views

Controlling multiple servos with python and hardware needed(RPi 3)

I'm kind of new to the Raspberry Pi world and I've been researching for tutorials and how to's all around the web for software and hardware regarding a small project (RC car/robot). What I've ...
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2answers
947 views

Move servo incrementally within keypress loop

After a week of searching... I have built a robotic arm run by a Pi 3. It has 5 servos, as well as a stepper motor. I have code written see, (Pastebin). And I am not able to get each servo motor to ...
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1answer
2k views

Pigpio With Pi 3 Controlling Two Servos

I am brand new to using the GPIO pins on the Raspberry PI and I'm having a lot of trouble trying to control two continuous rotation servos using pigpio with python and a keyboard. Servos here: https:...
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2answers
72 views

RPi.GPIO python code fails only in .py file

I am trying to control a servo with RPi.GPIO import RPi.GPIO as G G.setmode(G.BOARD) G.setup(5, G.OUT) p = G.PWM(5, 60) p.start(7) p.ChangeDutyCycle(50) p.stop() G.cleanup() When I run sudo python ...
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1answer
185 views

What is this servo to Pi connector?

I'm trying to connect this servo to my RPi3 with as little wire as possible. What is this red, black, green wire called that allows me to connect a servo to my Pi?
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1answer
763 views

How to control servo cam pan/tilt using bash and servoblaster?

Hello everybody, I'm trying to make a script bash to move a cam with servoblaster. when I strike a lettre (i,o,l,p) I would like increment or decrement a variable, to move the camera degree by degree ...
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1answer
84 views

Simple circuit to check the data flow [duplicate]

This question is a follow up for this question. I have a classic servo motor (Vin, PWM, Ground), and a short program to work with it. The code is: import RPi.GPIO as GPIO import time GPIO.setmode(...
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1answer
1k views

How to turn off / let float a servo attached to GPIO

I'm driving servos attached to GPIO, powered from external PSU and using PIGPIO Library through node.js - everything works just fine but I don't know how to completely "shut down" the servos - once ...
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1answer
2k views

Controlling servo SPEED with either pi-blaster or pigpio

Ultimately I want to be able to control up to 8 servos using node.js - I'm able to control the servos using either pi-blaster or pigpio, but how do I control their speed with which they move?
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1answer
697 views

Why do I need to connect servos to the ground of the battery and the ground of the RPi?

I'm trying to use two servos simultaneously and I've connected both servos to my battery pack which gives 6V (the servos require 6v). If I ground the servo only to the battery and I only use one of ...
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1answer
605 views

Why a resistance between signal and GPIO - External power source

I'm trying to power my servo from an external power source and control it with my Pi and I've found following circuit: http://razzpisampler.oreilly.com/images/rpck_1001.png Why is there a resistance ...
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1answer
420 views

Adafruit servo hat connections

I cannot solder the hat to the raspberry like suggested in the manual because the pins are alreade blocked by a proto-shield. However, I connected the SCL and SDA pins to the board and used an ...
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1answer
498 views

Gertboard to control 4 servos?

I have been given this arm: It consists of 4 servos, which need to be controlled individually. Can I control them using Gertboard? Gertboard has only one motor driver, but it also has several open ...