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Questions tagged [electronics]

Any device with electrical circuits.

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0 votes
1 answer
21 views

Figure out system state to turn power off

I have a mobile robot base that has a computer running Ubuntu onboard and a seperate microcontroller for power management. What would be the best way to make sure that the computer has shut down ...
• 11
-1 votes
3 answers
88 views

Controlling power input for different currents and voltages connected to the same power source

I am new to robotics and am struggling with the electronics a bit. I am using two 9 V batteries in series to provide 18 V. I need to power 2 x 12 W DC motors and an Arduino Uno. I need to divide the ...
0 votes
0 answers
37 views

How do I convert horizontal inward motion to vertical downwards motion

I have a small coil gun project for which I designed a magazine to put my soft iron projectiles, my main concern is to design some sort of magazine mechanism with a safety because the “accelerator” is ...
0 votes
1 answer
48 views

Aspiring to build a space rover from scratch. From where to begin?

What fundamental concepts, beginner-friendly resources, or online courses would you recommend for someone starting with little to no background in robotics? At first, I want to build a an autonomous ...
0 votes
0 answers
78 views

Stepper motor control with Sparkfun Autodriver L6470 in Raspberry Pi 4B

I am struggling and cannot get this to work all (stepper motor doesn't do anything, not convinced even energising as can turn manually with no resistance) Pins used from a Raspberry Pi 4B to a ...
0 votes
1 answer
36 views

Can’t get it all put together

I’m building a small hobby robot- here’s the parts I’ve got: 3 x 5 V brushless DC motors 3 x ESCs 3 digital voltage regulators RC MC6C transceiver 1 x 5 V battery 1 x 12 V battery WAGO Clip thingies ...
0 votes
1 answer
82 views

The Optimal Reduction Ratio

Hello everybody. For my robot design, I would like to utilize the most optimal gear ratio that I can use. For that I want to utilize the torque of my motor which is a linear function of rpm. This task ...
4 votes
1 answer
303 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
1 answer
129 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 ...
• 21
2 votes
1 answer
163 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 ...
• 33
0 votes
0 answers
151 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
2 answers
41 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 ...
• 111
1 vote
1 answer
762 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
1 answer
25 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 votes
0 answers
19 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 votes
0 answers
65 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
1 answer
41 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-...
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1 vote
1 answer
89 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
2 answers
79 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
1 answer
82 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 ...
• 99
1 vote
0 answers
114 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
0 answers
31 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
0 answers
1k 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 ...
• 31
1 vote
2 answers
637 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
4 answers
2k 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 ...
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0 votes
1 answer
41 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. ...
• 113
-1 votes
1 answer
98 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); ...
• 11
2 votes
1 answer
770 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'...
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2 votes
1 answer
158 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 ...
• 219
1 vote
2 answers
175 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
1 answer
35 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
0 answers
28 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 ...
• 11
0 votes
1 answer
106 views

I need the scheme of iRobot Create 2 [closed]

I've tried to drill a number of holes in my iRobot. I've missed one of them and I need the electronic scheme of iRobot Create 2 for trying to restore this input of the data cable. Can you help me with ...
• 1
1 vote
2 answers
924 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 ...
• 11
3 votes
2 answers
342 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
1 vote
0 answers
175 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
1 answer
785 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
2 answers
421 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 ...
• 11
1 vote
1 answer
405 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, "...
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0 votes
1 answer
152 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
1 answer
810 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 ...
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1 vote
1 answer
68 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 ...
• 113
3 votes
2 answers
236 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 ...
• 31
7 votes
6 answers
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/...
• 183
3 votes
2 answers
14k 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
1 answer
364 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 ...
• 311
4 votes
2 answers
150 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. ...
• 153
2 votes
2 answers
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 ...
• 107
2 votes
2 answers
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 ...
• 141
1 vote
2 answers
885 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?
• 107