Cycle Computer

[coldspot]

I finnally found a bicycle computer on sale!  

At Walmart $9.95

"Schwinn" sw500

12 function

Or maybe for a wind speed gauge?

Has anybody used this model yet?

Thanks

[elvin1949]

Coldspot

 YES try this.

http://otherpower.com/anemom2.html

Later

Elvin

[coldspot]

"An Easier Homemade Anemometer"

Yea elvin

Thats the backup plan

using it on the mill is the main plan right now

thanks

[snuffy]

I built my first anem. with a really cheap bike comp. but found that by the time I had it calibrated the "set" switches had failed.  I ended up getting a $28. one and it works great with the home made easter egg spinner. Worth a try, hope you have better luck than I did. Once it is set up it will probably do fine.

[coldspot]

Thanks snuffy-

being a schwinn product

it has a one year warrenty

so hope to be a good choise

I'll build some type of wind speed gauge

out of it I'm sure.

Have a great Day/Night!!!!!

[SparWeb]

Coldspot,

I'm currently using one like that on mine.  Very useful for doing run-up tests of the alternator on the drill press, and lots more.

The sensor is basically a reed-switch, and when a magnet passes it, the switch closes, sends a pulse to the computer, the computer counts the pulses.  Calibrate the meter with a funny number for "wheel diameter" (can't remember the number, but I can look it up if you want).  Currently the sensor is mounted on the hub bracket, and one of the 1/2" hub bolts has a ring magnet on its tip.  Works great.

The cord between sensor and readout, however, is too short!

[willib]

7 bucks at toys r us

[coldspot]

Steve-

Please look up the number you used

THANK YOU!!!

[SparWeb]

Coldspot,

Darnit, I can't find that piece of paper.  Starting all over again, I take any old speed as an example:

100 RPM

The sensor is picking up pulses per second and counting them, so:

100 RPM = 1.66667 Hertz

My computer is displaying kilometers per hour, and I want to fool it into reading:

100 kph

convert that into milimeters per second:

100 kph = 277778 mm / sec

Divide the speed by the frequency:

27778 / 1.6667 = 16667 mm

That wheel's a bit bigger than a penny-farthing, so if you can't enter that into your cycle computer's memory, you'll have to settle for 1667, which will give you 10 kph, and it's up to you to multiply by ten.

If your computer works in MPH, then you need 26822.