Night-crawler on a nightrider. 
Sorry, forgot to mention that pic was not mine; I found it online.
Maybe not a photo, but I got a couple plots of my latest ride, captured in a different way than you’ve seen before. I rode a couple blocks and picked up over 15,000 rows of data!
Raw delay data, in microseconds, captured (ideally) 36 times over each wheel revolution:
And that information converted to velocity in km/hr:
Not great data, but you can see the trends in speed. I’m pretty sure the two places with lines that arc toward zero (at the very beginning and then 1/3rd in) are what my mounts look like. Half-rev to get up, couple half-revs to get comfortable, then up to speed. The dips later down to about 7km/hr are stop signs.
I’ll spare you the technical details and explanation for why the data is so noisy and basically useless (this time!) for my purposes, since it’s all written up on my blog.
And a photo of the setup (sorry it’s so dark):
Yey Arduino 
I was thinking of logging some data from my unicycle but as I only have a muni and trials, it wouldn’t really be appropriate.
Might whack a 6DOF board on at some point - that would be interesting 
Just been reading your blog too and reading up about the 24h unicycle record - that’s quite some feat you’re thinking of undertaking - best of luck with it all!
Mowcius! Haha! One time I was jumping between these forums and the arduino forums and noticed that hey, that guy always posting on here has the same name as someone always posting on there… been meaning to ask if it was the same person!
Yeah my original ideas were to use accelerometers, and I might later incorporate them with this, but this is the best way I can think of to get a measure of wheel speed change with high rotational resolution.
Yeah it’s me. Onions off the arduino forum has also just got a unicycle but I think he’s only been on the UUU forum rather than the unicyclist.com one. He lives very close to me (within 40 miles or so) so I might meet up with him at some point and discuss unicycles and electronics 
I was discussing hall effect sensors with some people - you can place a magnet behind them and sense ferrous metals - not sure how well it would work with something as small as spokes or with (presumably) stainless spokes as they are often not very magnetic (or somtimes not magnetic at all)
I was thinking maybe a photo-interruptor disk would be better (but would probably need something like a disk brake hub or some modified ISIS cranks (like the sinz cranks used for mountain uni disks) as something to mount a disk to)
Oh and as you’re probably someone who might use IRC, I’m on #arduino and #unicycle 
I should have gone for a ride today so I could post a photo here and not be completely off-topic… If only my uni wasn’t broken. Here’s some from ages ago:
Nelson BC.
First big tour. Miss those dreads…
Mowcius,
Excellent. I knew about Hal-effect sensors but it hadn’t occurred to me they might be sensitive enough to detect spokes themselves! I wasn’t excited about the prospect of mounting 36 regular cyclocomputer magnets to my wheel. I’ll have to look into it more.
Yes, I will probably end up using the spokes as a photo-interrupter. Or, when I get my MountainUni disc break, I was thinking of using that. I like the simplicity of only having electronics on one side of the frame, though.
Either way I still need a method of tracking where on the wheel the signal is coming from, so I’d probably keep the taped rim if I used a spoke-based interrupt, etc. Or do some fancy software magic that used the valve’s interrupt to reset the counter…
Time to dust off my IRC client.
Nonsense! Whenever it’s muddy, you take out your crappiest clothes, and then fall in mud puddles and stuff. It’s way fun!
Disclaimer: Uni may need cleaning after a good day of mud bogging
There was an event on earlier in the day and most of the tracks I normally ride were ‘raped & pillaged’. And yes…I know all about the cleaning, it even gets in between the bumper and the saddle, as for having fun when you fall, I guess that depends on the risk involved. There is a risk of impalement or serious injury where I ride and its not one I am willing to take.
Well, I haven’t tried it with spokes and I am skeptical as to whether it will work - I’ll try test it out for you.
If you’re thinking of getting a mountain uni disk break anyway then you could probably mount an interruptor disk on the crank as well, make it kinda like a large top hat so it’s spaced off - then you could make a hole or two different sizes to work out where you are on the wheel (or have a second sensor and a single sticking up bit that passes through that every rotation).
I didn’t catch you on IRC if you were on yesterday - I’m on whenever my computer’s on though so I’ll hopefully catch you another time.
If I’m honest, if all my rides looked that dry I’d be very happy
My new high jump record… Goal for 2011 is to jump +90cm I will practise every day
Why dont you just set 100cm + for 2011? 
You’re far over that 80cm! You’ll get 90cm this year for sure, it looks like you have the good technic. Really nice tuck
Thanks! 100cm + would be great. I hope I can do it.
Roading the 36
Yet another road ride! On this trip:
- those access mirrors get everywhere
- Doesn’t look much of a gradient but roof line of house gives an idea
- No dreds but I can still make myself look like a goblin. Note my sleeves are longer than previous pic 'cos I zipped them back on!
- Photo give an idea of my general location
