Bike computer as chain counter?

[nigelmercier]

Why not use a proper digital counter ...

I thought the idea was that the OP wanted to use the device in his post. If not, there are other options, for example I've just built one. I'd be happy to provide the circuit details, but I'm a bit busy to make the units at the moment.

 

[ghostlymoron]

Wireless bicycle computers now at Aldi £6.99.

 

[Jamesuk]

Has anyone worked out how to use a cheap bike computer like this to count how much chain has been put out?

Is this something to impress the geek squad, we play it easy with markng the chain 10, 20..... 90 stops at 100.

Anyway could you mount it on the windless, although with salt it will be dead in a week