Hello,

I'm fiddling with the idea of changing my gearing, but I don't want to cough up $115 for the speedo healer. Too many features, a whole computer in there - it just seems like overkill when all we need is to generate an output pulse whose frequency is determined by a variable input pulse.

This sounds to me like the kind of thing that someone with the right know-how could wire up with some diddly little $5 chip and the right combination of resistors capacitors and diodes - and then we could all use it.

Has anyone looked into this?

-Avram

 

there are a number of ways to go about it but a PIC would be the easiest. and yes it's very cheap... and not that hard to program BUT - you'll need to make a PC board & seal it in a box, make a harness with the proper connectors to be plug & play....

buying just a couple parts at a time w/ shipping i'd bet you'll spend $50.
then you need a programmer ( yes, i have a few ). you can get a compiler
free after you debug the program.

by the time your done with it you might as well just spend the $100 to buy one ( unless you have a lot of free time ).


old school... you could program ( by the external DIP switches ) a simple counter but it'll have a lag in it. there are ways to reduce that but would require more space.... so like i stated a PIC would be the way to go.

imo

tim

 

Here is a kit to do it yourself:
http://www.jaycar.com/productView.as...=&SUBCATID=347

Here is programming that one: http://www.600rr.net/vb/showthread.php?p=1526467

To actually design one yourself that could be programmed for different sprockets etc would be a pain..

Really even with that "cheap" one up there, with the hassle and time etc, just buy a speedohealer or yellowbox for $115 and be done with it. Cheaper in the long run.

 

Or you could just use a bicycle computer, set the rim size, and be done with it.

 

You can just be lazy like me and well if cars are passing you speed up and if your passing them your good lol. I never really look at my speedo anyways.

 

+1

 

FWIW, I do like to keep track of my fuel economy. I mean yeah, the hawk is a guzzler by bike standards, but I still like to know if its guzzling more than it should be.

Also, if you're passing them, that could mean a lot of different things. For example, if they are going 65, it doesn't mean much. If they are going 85, then you could get into a fair bit of trouble.