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Questions tagged [robotics]

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Motor Reduction of a High Voltage Motor [closed]

I have a robotic device which uses several 48V BLDC motors connected to motor controllers and the controllers are connected to the rest of the circuit. Which are the best methods to protect the rest ...
0 votes
0 answers
36 views

Controll PD with Python

I'm applying a Proportional-Derivative controller to control my robot, but I don't understand why the robot's position doesn't reach the desired position. Can someone help me understand what the error ...
0 votes
1 answer
355 views

Driving an Adafruit motor shield and a bluetooth module with Arduino Uno

I am creating a simple 4 wheel robot (BO Motors 200 RPM) with Adafruit Motor Shield and Arduino Uno V3. I am trying to use a Bluetooth module to control the robot. However, unlike Mega, I do not have ...
0 votes
1 answer
18 views

Can I link two stepper controllers and motors of different types to the same step signal outputs from a control board?

I need stepper motors of different amps and weights to mirror each other to +/- 5% total precision. Can there be problems if I use the same step-signal pins from a control board towards two different ...
0 votes
0 answers
8 views

How to make a web server/connect to a web server using a raspberry Pi Pico W to use it to control an RC car [migrated]

So i am making a microcontroller rc car at home i need your thoughts on this. There will be 4 parts in this project: A) RC car: The RC car is powered by a 12 V battery. there are 4 x nema 17 stepper ...
1 vote
1 answer
29 views

Motor for lightweight high torque application (Jumping Robot)

I am in the process of designing a jumping robot, im trying to keep the weight below 2 kg, The robot works by compressing two helical springs with a linear actuator. The maximum force reaches 350N. I ...
0 votes
1 answer
79 views

24 VDC system and metal ground

I've built a rubber tracked mobile robot and it has a metal chassis. I use a 24 VDC 30 Ah battery to power a system which includes two DC motors, motor controllers, an industrial PC and some sensors. ...
2 votes
3 answers
549 views

Electrified Vertical mounted rotary joint questions

continuing my PhotoBioReactor project. Need some assistance determining not only what kind of rotary slip ring I need to use but where to get it as well. Basic overview: I plan on oscillating a ...
0 votes
2 answers
76 views

Making a timer on delay and off delay without microcontroller

I am new and want to make a compact circuit without a microcontroller. The idea is when you push the button/switch, it will delay the timer for at least 6 hours. After that, it will activate the motor ...
0 votes
1 answer
351 views

Drive a DC motor with a WS2811 chip

I'm building a robot that needs a lot of small hobby motors (or similar) to operate in sync. I was looking for ways to have as many of them controlled by a single source of logic as I am not sure I ...
2 votes
2 answers
295 views

Help choosing motor for a fruit cutting machine

I want assistance in determining an electric motor type suited to building a device for palm oil harvesting. Here is an example of one working palm cutting machine. This machine works similar to a ...
1 vote
6 answers
8k views

Rotary encoders to ensure 2 wheel robot goes straight!

I have successfully counted the rotary encoders on the wheel of my robot so this is not a problem. My problem is what to do with this number. Basically, the bigger problem is that I need my robot to ...
2 votes
3 answers
87 views

Using alkaline C cells to drive a pair of solenoids

I am working on a walking robot for my class in mechanical engineering. I have two 12 VDC solenoids that need to be actuated. Their resistance is 4 ohm so basically will require 6 amps @ 12V for the ...
1 vote
1 answer
5k views

Test electronic speed control (ESC) using a servo tester

I'm trying to test my 20A Hobbywing Skywalker electronic speed control (ESC.) For that I bought this servo tester from eBay. I'm a bit confused about the servo tester input. Shouldn't it be just ...
0 votes
0 answers
47 views

Using both safety PLC and safety relay

I am in the process of designing a robotic cell. This contains a safety door and several e-stops. I want to use the safety PLC from siemens S7-1200F. I need to have two roller tracks with 8 24V motors ...
0 votes
0 answers
25 views

Simulating Gyroscope with ARW, BI, and Spectral Density Using Physical IMU Data

I'm currently working on a state estimation project that relies on IMU data. While I have access to a physical IMU, I'd like to simulate gyroscope data with specific parameters, including Angle Random ...
1 vote
1 answer
192 views

Dynamic model of three dof to state space?

I´m trying to convert a 3 dof robot manipulator from dynamic model to state space. I saw a video where explains how to convert a 2 dof robot manipulator, but I don´t know how to apply it to a 3 dof ...
0 votes
1 answer
312 views

Controlling a circuit board from my PC

I am planning for a project I want to make that involves a custom pcb. The board is fairly simple. It has a 4 bit input. But I need to do advanced calculations from my computer to determine what the ...
1 vote
1 answer
66 views

Will running four motors (two high speed and two high torque) get the robot rolling? [closed]

I've been building a 2WD robot for 3 months now and been switching the motors frequently and been running into the same issue - low torque. I had these low RPM, high torque motors around and thought: ...
0 votes
0 answers
79 views

Connecting computer and motor driver grounds

I am designing a robotic system and seem to be having a ground issue whilst working with motor drivers. To improve system stability and for EMI concerns, I have split the power and signal using an ...
1 vote
2 answers
318 views

How to get a constant 5 V power supply when using the same power supply for motors and micro controllers

I have made a WiFi controlled car using NodeMCU. It works fine if I connect the NodeMCU to a separate 5 V supply. If I use the same power supply for both the motors and the NodeMCU, it resets ...
1 vote
0 answers
106 views

Coding Help: Blender to Arduino over Serial Port

Working on a connecting an Arduino Uno to Blender 3.4 over the serial port. In the Blender file, I have an object named "motor1", a simple cube that can be manually rotated in the 3d ...
0 votes
1 answer
30 views

Module for "Force Control" [closed]

I am looking for a device (e.g motor) for an Arduino or Raspberry which can change its force. You can imagine it as a servo but instead of controlling it through positioning it is controlled with &...
1 vote
2 answers
313 views

Can a BLDC motor still provide max torque for holding position when I run it at 24 V instead of 48 V?

I would like to do a Leg Robot project. I have an AK80-64 BLDC motor from T-motor. The specification says it can be operated at 24 and 48 V. Can the BLDC motor still provide max. torque for holding ...
1 vote
3 answers
117 views

Detection device for robots [closed]

I am an electrical engineering student and I have been in robotics since 2019. I want to create my own robots and I need advise on a detection device. Context : The match happens on a 1m×2m table, 2 ...
-1 votes
1 answer
243 views

Maximum weight for robot arm - MG996R [closed]

I want to build a robot arm (see here) to move a dumbbell of 2 kg (roughly 2.2 lbs). However, since I have no background in engineering, I have no idea how to calculate / find out if the servos used (...
-1 votes
1 answer
53 views

How to do sound localisation for an Inmoov Robot

I have to do sound localisation for a humanoid robot. This is my final year project given by our sir but I have no idea how to do it can anyone help me
1 vote
1 answer
240 views

Best way to provide 5V at a high current to power 12+ servos using battery power

I am currently in the process of building a quadruped robot that uses 12 SG90 servos, controlled by a PCA9685, for motion. I've found many examples of quadrupeds, but barely any mention of their power ...
1 vote
0 answers
392 views

Can i use ESP32 3.3V pwm on MG90D Servo

Ok so, im building the eletronical part of a sumo robot for my university team, and i came to a barrier, on past researchs we came to the conclusion that using MG90D servo is the best option for us (...
-2 votes
1 answer
93 views

MOSFET motor driver burns up with battery [closed]

I am working on a robot. I have used a MOSFET bridge to drive the motors. The problem is that when I test the motor drive using a power supply the circuit works fine without any problem but when I ...
0 votes
1 answer
55 views

Sensor to detect collision or intervention

I am currently working on a project (robotic arm) where I need to detect human collision with the robot. I need a sensor that should be flexible, detect human intervention in the workspace of the ...
0 votes
1 answer
104 views

Power supplying in robotics

I am experiencing an unstable power situation in my robot. My computer (Jetson AGX) and the lights (48 neopixel leds) are powered by the same source (https://www.mini-box.com/DCDC-NUC), which is in ...
1 vote
1 answer
2k views

How to calculate the rated speed of a DC motor given the no load speed, rated current and rated torque?

I am working on a mobile robotics project and I'm beginning to learn about DC motors. I am looking at a particular geared motor, and the given parameters are the no load speed, the rated torque, rated ...
-1 votes
2 answers
296 views

Pointers to Beginners (Robotics as Hobby) [closed]

I am interested in taking up robotics as a hobby. I am somewhat familiar with programming (not very advanced) and would like to get some pointers to recommended books / robotic kits that will help me ...
1 vote
4 answers
379 views

Getting started with robotics

My brother is a senior in High School. When he visited our college. I've took him to a robotics event (inter college robotics competition). He got to see various bots designed by college students and ...
0 votes
1 answer
271 views

How to limit current output to 1A from 12V lithium ion battery

We are making a simple bot that uses a 12 V lithium ion battery,which is connected to a power module, for 5V and 3.3 V output. Now I connect a TB6612FNG motor driver with ESP32. The ESP32 is powered ...
0 votes
2 answers
15k views

Controlling the speed of servo?

I know how to control where the servo will rotate: if I send 1 ms duty signal in a PWM interval it will rotate clockwise and if I send 2ms duty signal it will rotate counter-clockwise but how can I ...
1 vote
1 answer
423 views

Why can't the HC-SR04 sensor detect objects that are very close to it?

I am following this worksheet and I am struggling to understand the following piece of code: ...
1 vote
1 answer
3k views

MG996R that can rotate all the way around, but behaves like a normal servo

So I bought an MG996r online to replace a dead one in my robot dog, and I always test my new servos by hand and then by using sweep. When testing this one by hand, I found that I could turn it all the ...
0 votes
3 answers
80 views

How to get started knowing how to power my robot? [closed]

I have been a software engineer for many years writing code for websites/servers etc. I recently became intrigued with the idea of building land drones. I have decided to build a small tank that has a ...
1 vote
2 answers
143 views

Resources on multi-MCU architecture?

I am designing a 6-axis robot arm, and I just finished tuning the control algorithm for a single BLDC using a STM32 MCU. The next step led me to wonder how such system usually works: I don't think my ...
1 vote
1 answer
352 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 ...
0 votes
1 answer
210 views

I have a 5 volt converter but I also need 3.3 volts, what should I do?

Goal is to get 5V and 3.3 V output by the use of a buck/boost converter. Important is to use a converter instead of an LDO for heat reasons. I want to draw minimum above 0.8A, preferably 1-1.2A at the ...
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 ...
0 votes
0 answers
69 views

PID Control: Is adding a delay before the next loop a good idea?

I am implementing PID control in c++ to make a differential drive robot turn an accurate number of degrees, but I am having many issues. Exiting control loop early due to fast loop runtime If the ...
0 votes
0 answers
243 views

How to run encoder motor with motor driver and raspberry pi

I am kinda new to the Robotics field and Raspberry Pi and has worked on very basic projects with the hardware so far. My current task is to run the "Encoder Motor" with a motor driver(...
0 votes
0 answers
61 views

Axis of Euler rotation matrix

I'm searching the way to measure rotational displacement by using Euler rotational matrix. And I could find various information about it. Then I've found something wrong with reference axis. In the ...
1 vote
1 answer
213 views

How to improve AHRS algorithm

I'm currently working on a project with multiple IMUs mounted on moving vehicle estimating their pose. I've just read about AHRS algorithms. So I have two questions about them: Since my data is pre-...
0 votes
1 answer
56 views

Controlling esp2886 via bluetooth... help!

I am trying to control my esp2866 via bluetooth so I bought a DSD TECH SH-M08 Bluetooth 4.0 BLE Module. In a tutorial I saw they paired it to the computer and then under 'More Bluetooth Options', in ...
1 vote
3 answers
463 views

Finding distance travelled by differential drive robot

In a two wheeled differential drive robot, with wheel radius 7cm. bot starts from rest and the two motors are randomly actuated. Left wheel has rotated by 270 degrees, and the right wheel rotates by ...

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