Questions tagged [electronics]

Any device with electrical circuits.

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4
votes
1answer
45 views

Why does a motor does not run when a resistor is connected in series between the supply?

I decided to remove the battery (1.6 V 1600 mAh) from my trimmer and to power it via an old mobile charging cable (6 V 800 mAh). So I built a voltage divider circuit, which gave me nearly 1.6 V but ...
2
votes
1answer
40 views

Control signal of an LQR Controller

I'm working on building an LQR for a system which consists of a ball in a vertical tube, a fan is situated at the bottom of the tube and a distance sensor is at the top, a raspberry Pi is used to send ...
2
votes
1answer
72 views

iRobot Create 2 - bypassing fuse for serial port power, other current limitations?

I've recently acquired a Create 2 and want to power a Raspberry Pi (and potentially other sensors/motors) off of the serial port. I've seen the official recommendations (e.g. power from the motor ...
1
vote
0answers
54 views

What should be the required operating voltage for Servo motors in my 5 DOF robotic arm, with 50 kg payload

These are the estimated torque values of all axis in our applications 1st Axis- 226.57 oz-in - 478oz-in 2nd Axis- 756 oz-in -1590oz-in 3rd Axis- 356 oz-in - 749.7 oz-in 4th Axis- 188 oz-in - 395 oz-...
1
vote
2answers
34 views

DIY Smart Devices [closed]

I am a software developer. I make apps. I have several ideas for Bluetooth-enabled smart devices using basic accessories and peripherals like cameras, speakers/headphones, lights and some external ...
1
vote
1answer
144 views

Control a servo (two position 180-degree swing) with an On/Off switch without microcontrollers [closed]

For my application, I need to be able to control a servo with a simple on/off switch. When it's off (pulled LOW), I need to servo to go at -90 degrees and stay there - possibly for a prolonged time. ...
0
votes
1answer
19 views

AC Motors vs Hydraulic motors for skid-steering robot

I'm designing a mobile robot with tracks and skid-steering driving system and I am evaluating whether an electric motor would be better than a hydraulic one. I did some calculations, the total weight ...
0
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0answers
11 views

Avoiding obstacle of a car robot using IR

I am using an IR sensor which detects the obstacle. My question is how does 2 robots stops on a finish line which is an object higher that the height of the car robot if i am using IR, comparator(...
0
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0answers
50 views

Need help regarding electromagnetic suspension implementation

I an trying to implement an electromagnetic suspension system on model/small scale (like the bose suspension system in this video: https://youtu.be/3KPYIaks1UY). Upon doing some research on this topic,...
3
votes
1answer
38 views

Driving a small motor

I am trying to drive a small motor using (software emulated PWM) from a Pi like device. I'm following a circuit that looks like this:L https://www.instructables.com/id/Raspberry-Pi-GPIO-Circuits-...
1
vote
1answer
69 views

How to extract the servo motors of a Digital Micromirror Device?

The good news is, that modern DLP projectors are sold for a low price. Each of the projectors is equipped with a so called digital micromirror device, which is an MEMS array. It contains millions of ...
0
votes
2answers
69 views

Electronic Speed Controller

What should be the specification of ESC that I should use for a 320KV 1820W brushless DC Motor?. Is it necessary to use an 80A ESC?, Basically, How can I choose the required ESC for a motor?
-1
votes
1answer
60 views

Why my stepper motor doesn't move when I attach a blade?

I wanted to use the NEMA 17 stepper to drive a blade/flapper that I have custom made for some physical application.As soon as I tighten the screw,the motor stops rotation in the usual way. Don't have ...
1
vote
0answers
67 views

TGY-6114MD Servo motor needs push to start

I currently have an inspection robot deployed in a remote part of Africa that has a failing Turnigy TGY-6114MD servo. The issue appeared randomly. The servo won't respond to commands unless given a ...
0
votes
0answers
22 views

Can I combine BEAM robotics with fuzzy control?

Beam robotics invented by Mark W. Tilden is about analog circuits for controlling robots. The idea is to avoid microcontrollers and software and use instead resistors, breadboards and capacitor for ...
3
votes
1answer
808 views

CNC stepper motors are loud and slow after decreasing the steps/mm from 250 to 5

I'm making a drawing robot and have hooked up my steppers to each axis. I'm using the grbl shield with arduino and nema 17 steppers. Initially the firmware was set at 250 steps/mm but with my setup ...
1
vote
2answers
624 views

How to manipulate the magnetic field around a robot?

Nanorobotics can be realized with a combination of a magnetic field and a passive robot. The robot is equal to a tweezer which is controlled by an external field. This field is generated by ...
2
votes
4answers
979 views

How to deal with current spikes due to fast direction-switching motor commands?

I'm trying to build a self-balancing two-wheeled segway-like robot. I'm currently using two 12v DC motors that draw approximately 600milliamps of current each. I've noticed that when my robot tries ...
0
votes
1answer
29 views

Excessive Heat Coming From Video Transmitter and Motor Electronic Boards

I'm building a quadcopter and I'm finding that certain electronic boards are heating up beyond what I believe the heat should be. In this case I hooked up the video transmitter and then tested it. ...
-1
votes
1answer
36 views

How to connect different outputs from one LiPo battery?

I am building a robot. I am going to use ONBO 6S 22000 mAh 25C to power all my controller boards and motors. It needs to power the following items: 1 motor driver (24 V, 6 A); ...
2
votes
1answer
220 views

Calculating the resistor for a buzzer

Please note: Although this question tangentially involves a Raspberry Pi, this is really more just a pure robotics question at heart. I'm trying to connect my Raspberry Pi 1 Model A to this buzzer. I'...
2
votes
1answer
115 views

Raspberry Pi and Buzzers: Simple solution [duplicate]

I have a Raspberry Pi 1 Model A and am interested in attaching a buzzer to its GPIO pins so that the software (running on the pi) can turn the buzzer on/off by sending signals to the GPIO pins. I'm ...
1
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2answers
112 views

Are robot's codes usually compiled or interpreted?

I would bet that usually these are compiled for better performance, and of lawful reasons (make it harder for any user to save code without decompiling), though I'm not sure. In any case, I believe ...
0
votes
1answer
33 views

Wire connectors

I'm making an Iron Man costume for Comic-Con and it has electronics in the hand and head. I'm going to route both to the back to be handled. There is a certain type of wire connector that I want to ...
1
vote
0answers
27 views

Issues with the dual VNH2SP30 motor carrier and 131:1 metal gearmotor 37Dx73L mm w/ 64 cpr encoders

For a while now I have been trying to build my own robotic platform, kind of like a turtlebot. However, I have kept running into an issue with controlling the motors. My main controller for sensor ...
0
votes
1answer
90 views

I need the scheme of Irobot creator 2 [closed]

I've tried to drill a number of holes in Irobot. I've missed one of them and I need the electronic scheme of Irobot-Creator 2 for trying to restore this input of the data cable. Can you help me with ...
1
vote
2answers
653 views

2.4GHz helicopter hack [Edited]

I bought a little toy helicopter, namely the Revell Control 23982. After flying a few batteries I was wondering whether I could hack it in such a way, that my Arduino Uno can control/manipulate the ...
3
votes
2answers
325 views

Can high voltage power lines provide a super highway for drones?

Is there a way to convert the EM field that surrounds high voltage power lines for direct usable electricity for air or ground drones for continuous flight or travel? Added: Yes could the EM field be ...
1
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0answers
147 views

Technique to increase POV resolution

I have thought of a technique to increase the resolution of a POV (persistence of vision) display. In an usual POV display, the LEDs are arranged in a strip and spun in a circle. There are two ...
4
votes
1answer
506 views

What are good, low cost, actuators for a braille tablet to be controlled by arduino?

I want to basically make a pin matrix controlled either by spring, electromagnets or small motors(spring being the most viable option), something like what’s shown in the image. I'm pretty new to ...
1
vote
2answers
315 views

Piezo sensors and multiplexers

I got asked to make some sort of trigger pads for the foot section of an organ working over midi to a electric piano and my friend wants it to be pressure sensitive so we can program in the note ...
1
vote
1answer
343 views

Electric vs. internal combustion engine for propulsion

What are the main differences between electric motor and internal combustion engine for an ATV-sized mobile robot platform in terms of functionality, implementation difficulty ("RC" conversion, "...
0
votes
1answer
107 views

Neural Nework code or library for MSP430G2553 microcontroller [closed]

I am new here and i am new to neural network also. :P I have gone through the concepts of Neural Networks but i want to implement it in my project including microcontroller MSP430G2553 on LaunchPad ...
0
votes
1answer
665 views

How difficult it is to build simple robots (for example Line follower) using raspberry pi and ROS? [closed]

I want to build a low cost robot, running ROS for educational purposes. It can be a simple line follower using raspberry pi and an IR sensor. Is it overambitious as a beginner project? How difficult ...
1
vote
1answer
48 views

How to find center of a disk using robotic arm

Hello I am new to the field of robotics but have some knowledge of raspberry pi, arduino, python. I want to make Robotic arm which can be used to find the centre of any disk. There may be disk of ...
3
votes
2answers
171 views

Create 2: Wheel interface board replacement

http://www.irobotweb.com/~/media/MainSite/PDFs/About/STEM/Create/Create_2_Wheel_Hack.pdf?la=en Scroll to page 3. I'm trying to interface the Roomba's preloaded navigation system with a pair of ...
5
votes
5answers
3k views

Electronic circuit for heating nylon fishing line muscle

I'm trying to make artificial muscles using nylon fishing lines (see http://io9.com/scientists-just-created-some-of-the-most-powerful-muscl-1526957560 and http://writerofminds.blogspot.com.ar/2014/03/...
3
votes
2answers
12k views

How to calculate the current consumed by a brushless motor on a quadcopter

I want to create a virtual quadcopter model, but I am struggling to come up with a satisfying model for the brushless motors & props. Let's take an example, based on the great eCalc tool: Let's ...
0
votes
1answer
331 views

Powering my robot with 12V battery which is charged by a gas/petrol generator while the robot is operating?

A have designed a robot to perform tasks in farms. But the problem now is I'm not sure on the best way to supply continuous power to my robot. All the motors are rated at 12V and only Arduino and a ...
4
votes
2answers
134 views

Air hockey with a robot as an opponent

I'm not sure if this is the right place to post this but here goes. So, as the title states, I'm planning on building a desk that doubles as an air hockey table which has a robot on the other side. ...
2
votes
2answers
2k views

How can I get the values of a IMU from the serial message received in Simulink via UART?

I try to read IMU sensor data from an Arduino mega 2560 UART with serial receive block of Arduino support package for simulink. The IMU can send binary packets and also nmea packets and I can ...
2
votes
2answers
114 views

How to make door opening to the top

I need to make this construction (door is closed by default, door is opened to the top). This is the scheme: Red rectangle on the picture is the aperture, blue rectangle is the door (weight is about ...
1
vote
2answers
831 views

Voltage rpm relation

I measure the voltage ESC drawing while increasing the dc motor speed. Multimeter shows that as long as the speed increases the voltage value decreases. Can anybody explain why this is happening?
3
votes
3answers
163 views

What actuator types exist that remain locked in their last position like hydraulic piston?

I would like to find an electronic actuator that mimics the characteristics of a hydraulic actuator, in that the position remains fixed without power drain when the actuator is not moving. Which ...
0
votes
1answer
33 views

Circuit Design and Simulation [closed]

I want to design some circuits of my own. My area of expertise is in Computer Science Engineering. I have listed out the components which are essential in the circuit. I want a software which can be ...
1
vote
2answers
68 views

Many to One Bluetooth Communication Link [closed]

I have an application that requires data to be streamed from multiple Bluetooth modules to one host controller. Somewhat like multiple Clients and one Server. The throughput i am looking at is ...
1
vote
1answer
883 views

Dispensing precise quantities of liquid and powder [duplicate]

I've been toying around with the idea of automating the process of testing aquarium water for certain chemicals. Very briefly, salt water aquariums (reefs, specifically) require almost-daily testing ...
3
votes
2answers
272 views

Magnetometer to measure high angular velocity in small object

I have to measure the frequency of a little circle in rotation. You can image this circle flying in air, because this circle can't touch anything that is not in rotation. So I can't use some simple ...
1
vote
1answer
142 views

Automatic agricultural robot using 8051 [closed]

I want to build a automatic agricultural robot for my final year diploma project. The basic idea is to program 8051 to drive the robot in a fixed path in farm for ploughing the farm which i am ...
1
vote
3answers
2k views

What is the scope of Electronics Engineering in Robotics/Automation?

I am beginner in Robotics .I have taken admission for Electronics engineering one year back as we don't have specifically Robotics Engineering Branch in my Country.Now I am suffering from questions ...