How to wire up a gyro

[fluppet]

How to wire up a gyro

I was thinking more in terms of building one from the parts (preferably *large* parts), in the sub-hundred quid range, rather than trashing a few hundred quids worth of unnecessary Futaba joysticks, potentiometers and encoders, but thank you for the reassurance. :-)

The extra resolution on standard kit is nice to know about. I suspect Ill be stuck with the standard parts for things like gyros, so knowing their limitations and pretending to be standard kit for the purposes of interfacing is all part of it. Not that Im at that stage yet!

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Fluppet
(Must go home from work soon...)

[jim]

How to wire up a gyro

While using an RS232 data stream does give you a lot of advantages, its not the perfect radio control solution. You can end up with a lot of extra latency (delay between pushing the joystick and seeing the motors spin) if youre not careful. Maybe cloud 6 or 7

[fluppet]

How to wire up a gyro

:-) I was kind of hoping for better than 9600 baud (with some error correction sorting out the mess). I know a bit about embedded systems and Im not going to have Windows in the way latency-wise, but therell definitely be an overhead (Im hoping whatever radio modem hardware is available isnt going to try to be clever). Anyone care to comment about the kind of data rates I can expect in an arena? Just so I dont build anything relying on a video feed. :-)

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Fluppet

[jim]

How to wire up a gyro

I get 300 baud :-) Thats with LPRS modules, which Ian Visser also uses. Im hoping to speak to him at the next FRA social as he seems to do alright with them. If you find a radio modem which can get better speeds in the arena, is acceptable to event organisers and below £200 for a TX/RX pair please let me know!

[fluppet]

How to wire up a gyro

Oh dear. Weird and wacky encoding has it, then. :-) Ill look into some parts (as it were) and let you know if I get any alternative suggestions - although web searching for radio modems got me approximately nowhere.

That kind of money and bandwidth does say to me that I might be better just modifying an analogue setup (encoding all the messages as analogue inputs and decoding the receiver pulses myself), but maybe Im being too pessimistic. Might also be a bit harder to sort the telemetry, if the electronics isnt built to be small.

Let me know if you reach any conclusions having chatted to Ian? Im afraid youre a bit up north for me to make the trip to a social just to pester you about radio modems, at this stage. :-)

Sorry, Ive sidetracked the thread nicely there. Anyone got any comments on my question about multiple axis gyros? If they do it, I can try to think what to use it for (although a few devious ideas do spring to mind). :-)

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Fluppet

[Guest]

How to wire up a gyro

Why would you use a gyro?

Rob

[joey_picus]

How to wire up a gyro

To prevent your robot going off in one direction when you want it to go forwards. As said above, it only really helps if you have two wheels, and they do some very strange things if youre inverted.

[Guest]

How to wire up a gyro

KK TY