Cycle Computer - Does the magnet matter?

[Dave5N]

If you put two magnets on you go twice as fast.

Thanks for the tip. I was wondering why I was finishing a lap down. That explains it. The others must've had two magnets.

 

[BentMikey]

Polarity with a reed switch? LOLOL!

 

[bonj2]

Lightest way is to buy a small rare earth magnet and glue it to a spoke.

I got that top tip from weight weenies!.

Why does it have to be rare? Won't a common one do?

 

[alecstilleyedye]

the sigma magnets are very light. and buggers to remove without hurting your fingers.

 

[Milo]

You might as well go to the loo before getting on the bike my magnet only ways 50 grams or so and its a cheap computer.

 

[Dave5N]

Hey! Don't shoot the messenger!

 

[cicaparlez]

After years of reading forums, this is the first one that i've registered to use. The only reason I did so is to let you all know how much I enjoyed reading the comments in this thread. You guys are awesome!! Ta x

 

[slowmotion]

My guess is that the pick-up isn't a reed switch but a solid-state Hall effect switch.

See here...

http://en.wikipedia.org/wiki/Hall_effect_sensor

I've no idea if the magnet strength affects performance.

Edit: Hmmm, that might well be wrong given the need for low power consumption....

 

[Norm]

WARNING!!!! 3 YEAR OLD ZOMBIE THREAD.

Before anyone else makes the mistake that slowbie made and before someone welcomes Bonj back.

 

[Sleeping Menace]

Also.. put the magnet 180 degrees *as much as possible) from your valve stem and you'll go a ways towards putting the wheel in balance. Wheels are almost always heavier at the stem..this serves to counter that..

........................
http://anotherdooratthe.endoftheinternet.org

Cycle related blog entries, including a few 5 minute reviews:
http://anotherdooratthe.endoftheinternet.org/category/cycling/

 

[Cubist]

Bloody hell, welcome back Bonj and Punkypossum!

 

[slowmotion]

Can somebody talk me through this epic episode of CC lore?

I is lost.

 

[Cardiac]

Polarity with a reed switch? LOLOL!

Generally it's not an issue (and I perhaps never with bike computers - I am no expert on them), but SOME reed switches are configured to operate in a particular way whereby they have a fixed bias magnet to create a local magnetic field, and then the north pole / south pole orientation of the moving magnet does matter. One way it will work, the other it won't.

I love the idea of two magnets to double the reading - made me chuckle.

 

[Fab Foodie]

WARNING!!!! 3 YEAR OLD ZOMBIE THREAD.

Before anyone else makes the mistake that slowbie made and before someone welcomes Bonj back.

Ahhhhh, you see the prescence of bonj is felt from beyond the forum. His bonjness transcends time and space as we know it.

 

[steve52]

i now in the shed franticly rubing a magnet along each of my spokes!!!! the idear is to magnatise each spoke!!!!! how fast will i be then?