Questions tagged [servo]

A kind of motor with automatic feedback, such as a hobby RC servo.

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30 views

What would be the correct amount of voltage to power an Arduino UNO, XBEE shield (with XBEE module), and five Tower Pro SG90 Servo motors?

I am designing a glove-controlled robotic hand using Arduino UNO and XBEE. For the hand itself I am using the adafruit 16 channel PWM Servo Shield and using 5 SG90 servos for each finger. My problem ...
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56 views

Power servo with lipo battery with XL6009

I'm trying to make a uselessbox, so I have: An Arduino Nano (Chinese model with CH340 driver) 2 SG90 9g servos 1 switch Everything works fine when the Arduino is plugged in to USB, but when I'm ...
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47 views

PCB pancake slip ring brushes [closed]

I am designing a mechanical attitude indicator for the avionics simulator. I need a pancake slip ring, that drives servo (max 500mA at 5V) and some backlight. My idea is to use a gold-plated PCB and ...
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1answer
25 views

circuit design options between switching Servo GND vs switching vcc

I have couple of design choices wondering which one is more appropriate, I am controlling a SG90 hobby servo with an Atmega328p using a NMOS. I could either switch the servo GND or servo VCC just ...
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57 views

Voltage drop, current increase when two servos connected

I'm trying two design a bionic prosthetic hand adding control and movement to an open-source Thingiverse mechanical hand. The main is to move two MG995 when a muscular contraction is performed (...
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73 views

Arduino Actuated relay

I'm developing a device with an Arduino that has to switch off a servomotor that has 3 wires: GND, +12v and pwm signal. I'm not sure where is the best place to put the relay to switch off the motor. ...
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2answers
62 views

Design approach for a servo and LDO for rest of the circuitry

I have 3 D cell alkaline batteries in series. They are rated at 20Ah. https://uk.rs-online.com/web/p/d-batteries/9145058/ The circuit spend most of its time in deep sleep only consuming 8 uA of ...
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39 views

Pigpio control of SG90 servo is imprecise on Raspberry Pi

I'm in the process of trying to build a laser turret using two SG90 servos, a laser diode and my Raspberry Pi. I've come to realize that the pigpio library I'm using to control the servo seems a bit ...
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1answer
42 views

Level shifting 3.3V to 5V for PWM output to servo

I am currently trying to control a simple servo motor using PWM generated by a MCU with a 3.3V output voltage. However, this servo works with 5V, so I need an IC capable of "converting a 3.3V PWM ...
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2answers
40 views

Servo motor signal voltage vs “working” voltage

I'm looking at a few servo motors (on Amazon.) Typically the "Working Voltage" is 6-7.4V. I can supply that with a power supply but what can I do about the signal? Can I just feed it the 5V ...
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1answer
42 views

Servo motor always limited in range?

I am reading up on (servo) motors to start to play around with them. It seems to be that all servo's are limited in range. Most have a 180 degrees range I read. This would mean that the shaft of a ...
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64 views

Is it safe to drive a 5V servo using a logic level shift board?

I would like to turn off and on a servo while it is not used. The LV would be 3.3V and the HV would be connected directly to s lithium battery. Could it work if I replace R4 with a servo? What problem ...
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1answer
57 views

How to design a switching circuit with minimal voltage drop?

I am using a high side switch with BSS84 MOSFET. This is used to power on and off all the sensor and actuators during deep sleep of the uC. All the sensors are working except the SG90 servo. There is ...
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100 views

Servo motor and EMI noise on peripheral devices (microcontroller)

I have 6 servo motors (DELTA ASD-A2-0121). Peripheral devices are affected by EMI noise (When motors are in on state and have no movement). I have changed the ground system from series mode to ...
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Servo and power supply problems

I'm new to Arduino so baby language for me please :) Problem: I'm trying to power 2 servos (https://www.amazon.co.uk/gp/product/B07DQFXDC9/ref=ppx_yo_dt_b_asin_title_o07_s00?ie=UTF8&psc=1) but ...
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1answer
40 views

Set servo limits from PWM signal with 2 potentiometers and no microcontroller

sorry if this has been answered before or if this is something really naive/impossible. my experience is mainly with SW dev and I am trying to do this for an RC car so here it goes: Turns out I have a ...
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1answer
65 views

16bit PWM beyond audible range

I need to precisely control (the position of) a small 3 phase servo motor with a microcontroller without breaking the bank. My research and confidence in my own skills has led me to something like an ...
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1answer
68 views

Circuit voltage / amp calculation

I am new to electronics (using Arduino), begging to venture into creating my own circuits and not following set example. I would appreciate advice on the following. When deciding upon how to power a ...
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1answer
52 views

Servo motor speed and torque

From what I've read the speed is controlled based on the supplied power voltage, or using delay on arduino code, how about the torque, is there a way to make the servo motor change the torque ? like ...
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29 views

How to control an E9001 Servo

I bought an E9001 servo on Amazon (which was my first mistake, but it was cheap- see link) to use in a robotics project, but I can't figure out how to use it, and I cannot find any formal ...
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47 views

What is the formula used for servo motor positioning?

First of all, to be clear, I am not very experienced with mathematics applied to electronics but I have had the interest for a while. What is the right approach to knowing the position of a servo ...
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46 views

Controlled solenoid stroke length

Let me create a scenario to better illustrate the problem I have 1500 pens that I want to individually actuate upwards with 3 different distances, ex: 10mm/15mm/20mm I thought I could use a solenoid ...
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2answers
77 views

Switching power supply (SMPS) for servo motors

I would like to find a switching power supply to power one ClearPath servo motor. I am aware that SMPS is not recommended for servos, but I don't need power for fast deceleration/acceleration. Beyond ...
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107 views

Power spliter for Raspberry pi and servo motor

I have a raspberry pi. I want to control a 12 volt motor (low torque). I believe the motor only has two connectors, and when it is powered it goes. The motor goes off of 12 volts where as the ...
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3answers
67 views

Rotor Zero Degree

I have a 3 phase ac servo motor. I wrote a foc algorithm suitable for this motor (I think!), but I need to determine the zero rotation angle to get the starting commutation of the rotor. I asked this ...
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2answers
72 views

Providing +/-10V Power

I'm working on a project using a micro to control two industrial servo drives. These drives take analog inputs of -10 to +10v. My plan is to use a dual-rail opamp circuit that takes a pwm input from ...
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2answers
107 views

555 timer to control a servo with 2 variable positions

If possible, I'd like a circuit with a 555 timer, 2 potentiometers and I want to control the circuit with 1 digital input (5V / 0V). With the 2 potentiometers, I want to fine tune two fixed positions. ...
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2answers
123 views

5V 4A power supply for simple circuit

I am a 14 year old electronics noob. I am mostly a programmer and mechanical designer. I have been working on a robot which needs around 4 amps of current. I am thinking about using a simple 5V 4A AC ...
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2answers
380 views

How to interface UART servo? (LX-224HV)

I am trying to interface a RaspberryPi (2B) GPIO-UART to the this serial servo (Hiwonder LX-224HV), as a first step before to switch the Raspberry by an ARM MCU (STM32F407ZE on custom circuit). The ...
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1answer
30 views

Wiring ASMC-04B Servo With Raspberry Pi

I am normally pretty good with wiring up stepper motors and having a step pin which can be pulsed with a gpio output and a direction pin that can be set to high or low. Also using servo motors that ...
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3answers
99 views

Servos going crazy! Help! [Solved]

Every time I boot up the board (DFRobot Bluno) the servos start moving without me telling them to. Earlier, it worked perfectly fine but since then, I've change the electronics set up a little bit and ...
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1answer
75 views

Can I connect a Raspberry Pi and a servo shield to a single power supply?

I'm building a robot that requires 12 servos and a Raspberry Pi. I will be using the Adafruit 16-channel servo shield(https://www.adafruit.com/product/1411) and a Raspberry Pi 3B. Of course, if they ...
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26 views

Controlling 9 servos with a Bluno board

I'm trying to build a robot that requires 5 micro servos and 4 standard servos. The micro controller board I am using is a 'DFRobot Bluno' (compatible with Arduino software). The board gets power from ...
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1answer
89 views

Servo motors: does neutral position imply a 50% PWM duty cycle?

I'm working on a project using a Savox SB-2290SG servo motor. The datasheet I received is only 3 pages long, and includes limited information on the control interface. I've posted the relevant ...
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1answer
249 views

I have 2 Arduino programs that work separately. How can I merge them?

Program 1 2 red LEDs & 1 green LED are high for 4 seconds then low for 4 seconds. Red is then high for 4 seconds then low for 4 seconds then it repeats. ...
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4answers
143 views

Laser scanning: Why are things like deflection and mirrors used instead of just a mount and servo?

In the Wikipedia article for laser scanning, it is said that laser scanning is the controlled deflection of laser beams, visible or invisible. It then lists some of the technologies used, such as ...
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189 views

How can I make a half-duplex UART to TTL converter for communicating to a servo with a HC04 and a HC126?

I have been trying to configure this circuit for some amount of time. I am using a HC04 chip and a HC126 chip. The HC04 is an inverter chip. The HC126 is a buffer gate. I found that for the servo ...
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2answers
63 views

What would I use to distribute power in my project?

I want to power 10 SG90 servos, which each operate at 4.8v or 6v and need over 1 amp in order to start and use 700ma max during operation (I think). When I look at a kit like this (https://www.amazon....
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85 views

Regarding PLC and several input/ output modules

I have to use more than 40 servo motors and 20+ load cells using PLC. But the problem is that I have to use many I/o modules ( that is costly and hectic). Can I reduce the no of I/o modules by any ...
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33 views

How would I power and wire a raspbbery pi 4 and 20 servos?

I am trying to control two robotic arms with a raspberry pi 4. I will need to power the pi and 20 SG90 servos. I am pretty new to electronics, so I am not very sure on how I am going to do this. I am ...
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42 views

Continuous servo "misbehaving' with arduino uno

I've recently got a TowerPro MG996R 360 degrees Robotic servo and after many tries I still can't get it to work properly. Using the Arduino's Servo library I wrote a simple program that writes a value ...
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2answers
128 views

How can I improve this circuit to drive a servo with a 555 timer?

I am trying to use a 555 timer to create the PWM signal for a servo motor. I found and constructed the circuit in the attached image. It does work as advertised, and I can adjust the servo's ...
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117 views

Unknown Component Identification

My friend and I are repurposing an old rc car. We're trying to wire up the steering, but we've never seen the type of motor that it uses for steering. It has 7 wires. What is this component and how do ...
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1answer
103 views

Driving Servo Motor with Raspberry PI 4 and ServoBlaster

I'm trying to drive this DS3225 servo motor with a Raspberry Pi 4 using the ServoBlaster software. After installing ServoBlaster, I run the following commands: ...
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1answer
75 views

How can i externally power 5 micro servos and one mg996r?

I am building a robotic arm with 5 * SG90 9g micro servos to flex each finger and one MG996R servo as an elbow joint. The servos were working inconsistently, with not enough torque and jittering a lot....
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33 views

Trinket M0 PWM ValueError: duty_cycle must be between 0 and 65535 inclusive (16 bit resolution)

I'm trying to control a servo motor from a Trinket M0. My circuitpython code is: ...
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1answer
24 views

Delta Servo Drive 220V/400V Series

ASDA-A2 Delta Servo Drives including two types: 220V and 400V series that it seems the difference is input voltage of the Servo Derive. but i doubt 220VAC or 400VAC is line to line voltage or line to ...
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2answers
54 views

Suitable motor for steering wheel angle of the self-driving car?

I am working on the self-driving car as a final year project. I want to map the steering wheel motor angles with frames captured via a camera of the track. In order to generate the dataset, I am ...
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1answer
64 views

Controlling Servo with MOSFET

I'm trying to understand how to drive a servo that needs 5V power with a 3.3V output microcontroller. If I have a 3.3V PWM signal and a 5 V power source, is there a way that I can use a single N-...
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28 views

a Variable rehostate servo Motor to discharge a Tesla S model battery

Anyone could help me to find a Variable rehostate with servo Motor to modify load on a high power system. I am trying to discharge a Tesla S model battery.

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