Recent content by sbstn

Oh cheers Simon thanks for going to so much trouble! Definitely a great help. The way the pipe is being constructed means it's effectively a loft/extrusion of a rectangle with rotation over time, meaning the cross section will maintain its dimensions - that should help to simplify things a bit...

Great thanks very much, can I ask why the corners?

Hello, I was wondering if I could get some advice on how to build a robot that can traverse the inside of a twisting square tube, whilst staying at its centre. Heres an image of the kind of tube it will be: Its probably doable with a rollercoaster style design but it seems like an...

Can you explain that a little more? All I need is a PID system (hopefully I can use SMD componnents) to keep it still. I feel like it would be more bulky if I added radio gear rather than have it more or less autonomous don't you think? If you're thinking of a more physical solution, that would...

This is very useful - presumably I could also use this to drive a resonance transformer? If I replace the transformer with an antenna, is there any kind of setup that would negate the need for heavy shielding? Lower gain, more directionality?

This is amazing, both of you :D I think I'm going to slightly change my goal and shoot for 10W, and try instead to make my copter more efficient. I'm going to try the inductive coupling first to see if I can get enough power to meet my needs, that way I won't have to worry about shielding and...

OK thankyou for the help, I'll have to do some experimenting. I'll let you guys know what happens.

Yeah UCL Hah I feel like this is far too amateur to be dealing with AW (I won't be doing anything engineering based at uni) Not a science far, a component for a larger project. I'll try and PM WBeaty. Working with a magnetron seems over the top - they generate a dangerous frequency of...

Two rotors spin the other way to cancel out the angular velocity. Everything is controlled via rotor speed.

That does seem like a much more simple way you've convinced me. (No servos needed for a quadrotor by the way.) I'm still going to try r.f. transmission on the side though, I promise I will be careful with interference. Except now it won't be in the public space so you have certainly saved some...

If your this unsure I guess the university will be doubly so, thanks for letting me down easy though. How would it be powered through the airstream I'm not sure I understand?

No of course, and I think as I am displaying it at a university I would soon be stopped from becoming a liability. If I were to cage off a large area, and then put perspex to stop people getting too close - would that be safe enough? How directional could I make the antenna?

A dark room and lighting the object from the inside would make it pretty visible despite the small hole size needed for the stuff. I would love to give the inductive coupling idea a try as it would free it all up but that seems too hopeful. You sound very against this whole thing, level with...

Yeah that's right. There will be a pedestal with the transmitter 15cm below and the thing hovering at eye level. It's sort of a high-tech show piece... I sort of need the thing to stay as still in the air as possible; I want to hook up a tiny microcontroller to pull it off (that much I can do)...

I've seen his TED talk where he uses a coil half the size of a cellphone, which is interesting but I wrote the idea off as too complex. I guess the idea is based on tuned LC circuits? Not sure how much more complex the circuit would need to be than that (I chose microwave transmission because it...