4 Mar
2010
4 Mar
'10
6:20 a.m.
On Thu, March 4, 2010 09:48, Jonathan Gazeley wrote:
1. A sensor that can measure my cadence. A simple
magnet switch that
triggers once a revolution won't be enough to measure the cadence with
sufficient resolution, since my cadence is usually between 50 and 80
rpm. I would probably need to mount multiple magnets spaced equally
around the chainwheel and have a single sensor on the frame. Then I have
to get it to supply this information to my control program.
Cycle computers which measure cadence work with a single magnet on the
crank and can measure cadence in that range and above. I think the fastest
RPM I ever got was (only a vague memory) around 120 (maybe?) when I was
being silly trying to see how fast I could pedal.
I have absolutely no idea why I would want such a
device - just for the
fun of building it, I guess. I would like it to work in realtime (rather
than later generating the soundtrack from recorded cadence data). The
thought of sitting at the traffic lights with my earphones in and then
hearing the mighty roar of a V8 as I pull away would be really
satisfying...
Would it not be better to have a pair of mighty speakers in the shape of
twin exhaust pipes sticking out the back so every one else can hear the
roar :-D