Tue, 07 Sep 1999 16:13:37 +0100 - Message No. 6329
From: Anders Hartzelius

Subject: Re: Consumption meter, problems...


Phoebus wrote:
> 
> I am talking about the idea of hooking a bicycle meter to the fuel pump
> to get gas consumption.
> 
> The good news is it works.
> It seems to give results that are analogue to the bikes consumption.
> 
> The bad news is that it can't be callibrated!
> I made some calculations, and it seems that in order for it to work
> correctly it should be callibrated for a bicycle that has a whell
> circumference of about 40cm, or if it is callibrated to 400cm it would
> show 10km for each liter.
> But the meter I have can only be callibrated between 112 and 255cm.
> 
> So, my advice for anyone that would want to try making such a gatzet is
> to stick with Possi's idea. I think it whould work better.
> 
> That's what I will do.

Or maybe you could define the circumference as 160 cm and divide the
pulse rate by 4.
Or define the circumference as 200 cm and multiply the pulse rate by 2,
although dividing is easier.
There are plenty of electronical and electromechancic devices around
that can do that.
It will reduce the accuarcy a bit but not that much.
If you send me a diagram of what you've done so far I'll see if I can
find some suitable gadget to add.

/Anders

--
ATIC: #106	BTBC: NL172	SM0PXC



www@atic.org