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So, I’ve researched the Van De Graaff Generator. It generates 5 megavolts, I think it’s enough power for a 20 ft mech. I’m also a programmer so I can design an operating system for the computer. One of my friends is good with designing circuits, so he will build the circuitry. I just need the money to put all of this together.

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Net of bijna klaar met je technische studie? Leg dan de basis van je carrière met de Techniek talentpool. Dan helpt Moongro jou om de perfecte technische baan te vinden die daadwerkelijk bij jou behoeften passen.


What's going on guys,

I was wondering if anyone knew of any cheap multi axis robots that will run on 120v ac for home use.

I program and fix ABB robots for a living, and would love to have something at home just to tinker with and maybe even pour me a cup of coffee lol.

Everything i've seen is super expensive or doesn't really have a high payload.

Any help would be appreciated!



I'm in process of brainstorming and blue printing BB-8 from Star Wars. I've seen some great replicas online with Canvas cloth and mass produced toys with plastic.

With that in mind, I wanted to push the boundaries and try something bigger and would like advice on torque, motors, and feasibility.

I'm looking to create a 1:1 BB-8, Aluminum body.

It's specs are:

Height (head and sphere) 670mm

Body/sphere 500mm

Head ~170mm height

I don't think the head will be a major concern for me, yet. It's something to calculate later.

The inside electronics involved are an RC car motor, with the offset center of gravity causing the sphere to move. The BB-8's top head will remain upright due to large and strong neodymium magnets on the head and the internal propulsion system (which moves with the ball).

500mm Aluminium hemispheres are not easy or cheap to find. They're running around ~150+ each. Note I am using hemispheres so I can insert electronics without attempting to slice in half a half meter tall ball, but calculations will use an entire hollow sphere.

With a body diameter of 500mm and a thickness of 3mm.

Radius of 250mm, 244mm of it hollow. 4600207.1808mm^3

Weight of Aluminum = 2020.75kg per metre cubed (m^3)

2020.75kg * 0.00460021m^3 = 9.2958743575 kg

For less thick versions;

2mm yields 6.25kg sphere.

1mm yields 3.15kg sphere

Given the Spin master BB-8 (mass manufacture) is around 14-15 lbs (~6.5-7kg) I envision there could be a degree of success with this project.

Would it be feasible or possible to roll such a sphere using an internal weighted motor, or it wouldn't be prudent due to the weight? Are there any suggestions for an alternative motor/motion system?


I am looking for pictures of the first (I think) industrial robot for a personal project, but I cannot find many in google, in particular of the control panel and a close up of the claw.


Are there any small project robot arms or automation systems where you can learn how to program stuff like that at home?


Check out how this social robot startup is testing A.I. dialogues -

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Hi, I'm just starting in the world of electronics and I'd like my first project to be a pair of exo arms that would assist me in lifting stuff (something like this). I don't want to start super elaborate so I think that its doable. Now I was looking for electric motor I realized that none of the supplier gave any actual information on the torque other than "HIGH TORQUE". As a result, I have no idea what to buy. My version would allow bigger motor since they'll be on my back instead of on the arm itself. Can anyone point me in the right direction?

Edit: Also, whats the best method for powering the arms? I was thinking of dc motors but there's also hydraulic or pressurize. Though?

Edit 2: Could this be the answer to my problem? -


Hi, i am about to complete my Bachelors in Electronics and Communication Engineering. I need some suggestions regarding good universities for pursuing my Masters(US and Europe preferred), at the moment I have no interest for a PhD (I don't know if i will develop an interest for that along the way). I have some experience in Robotics by working on few projects over the course of my engineering and have developed interest in this field. I would be grateful if you could help me.



Hello everyone,

I have wanted to become a robotic engineer ever since I was young, and so naturally I had enrolled in the classes I felt were required to get me into the field. Unfortunately, subjects I was taught in school were taught in a very "non-applicable" manner. An example would be in mathematics, where knowing how to solve an equation to get the correct answer was encouraged. NOT the application of the equation, how I can apply this equation to real world systems, or what the hell they actually mean. Differentiation and integration for example... I know how to solve these, but I have no idea as to how to apply or create or derive my own equations in order to describe a robotic system I am trying to build for learning purposes.

The jacobian matrix taught at University for example...
"Class, this is the jacobian matrix" "It is used to control robotic systems. This is what it looks like"
End of. Done. That's it...

I feel like I was told what to do, instead of taught why I was told to do what I was being told to do and how to apply this...
If that make sense?

I have worked for a number of companies free lance after graduation (UK education system here), and I have been successful in building a variety of interesting robots from scratch. However, I feel like all of these are flukes, and I would love to understand how to utilise differential equations for example, and to understand how to create my own, so that I can become a better engineer. I have bought books on Modern Control Systems, Linear Systems Theory. But again, they do not tell me how each concept can be applied to an actual system, and I am struggling to understand any of the material. I am currently unemployed out of fear that I will not be able to fulfil the requirements of my next employment role.

Thank you for your help!
I hope this has been posted in the correct place, I have literally made this account in the hopes that someone will be able to guide me toward bettering my understanding of a subject that I feel I am "bricking" consistently.


Hi I had someone come overseas with this device. He left back without it and said dont worry he will grab it next time he is in town that was 2 3 years ago. He forgot about it. I didnt know what to do with it. Is this something expensive or should I just toss it.

Here is a link to what it is.

Looking to get some info on what it is used for and if it's expensive or toss it. If it is an outdated equipment? Wondering that's why he never came for it. I havent heard from him for couple years now

Posted by
2 days ago

Hey folks,

I am working on a project where, among other things, I will need to detect the relative bearing between my robot and a large, metallic object in a harsh environment. The reason I am assuming RF is the correct option is because I need the solution to be robust against the harsh environment (which, in this case, is any type of weather you would expect someone to drive a vehicle through along with large amounts of dust and debris). The solution does not need to be incredibly accurate and I can probably get away with being up to 45 degrees off.

I will have additional range sensors which will keep my robot between 1 and 3 meters away from the large metallic object.

My question is, what sensor would you recommend I use for a situation like this?

I have to keep most of the information private, but I will do my best to answer any questions you may need answered to help me.

Thank you very much for your time!

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