[dorkbotpdx-blabber] Making a stationary racing machine

[Trystan Cobbett]

That's a good idea, I was wondering where I was going to find the  
magnetic sensor. I'll see if I can find a motorcycle set up.

Trystan Cobbett

R A P H A
Performance Roadwear
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trystan at rapha.cc
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F  503.206.3855
M 323 640 1603

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On Jun 19, 2008, at 8:05 AM, Dread Pirate Kermit wrote:

> On Wed, Jun 18, 2008 at 10:22 PM, dan p <gunterhausfrau at gmail.com>  
> wrote:
>> sure, lots.
>>
>> a typical bike computer uses a magnet and a "sensor" I believe  
>> usually a
>> coil and counts the number of times the magnet passes the coil  
>> (pulses from
>> the coil, magnet on the wheel).
>
> I think they typically use a Hall effect sensor, but close enough.
> Whenever the magnet passes the sensor, a pulse get's sent to the
> 'brain'. X pulses/sec = Y MPH. Most modern motorcycle spedometers work
> almost exactally the same.
>
> -- 
> Ken Morton
> IBR '03, '07 IBA 257
> '03 Aprilia Tuono "Bunny" '06 Suzuki DRZ400SM "Chunky"
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