speedos for 5″ locos

[Pearl Parker 1Participant @pearlparker1]

I have been trying to find a cycle computer that can be programmed down to 3" diameter wheels. I have a cheap one from Sainsbury's that I successfully programmed to ten times the speed. I tried Halfords but after much head scratching said they could not help.

Ken P

[Pearl Parker 1Participant @pearlparker1]

cycle computers

[Bob Brown 1Participant @bobbrown1]

Have you thought about something like this **LINK** ?

Bob

[Les Jones 1Participant @lesjones1]

Hi Ken,
Why not just divide the number of pulses from the sensor by 8 (Or some other suitable number) using a CD4040 or similar device. If you then set it for a 24" wheel it would read correctly if the sensor was on a 3" wheel.

Les.

Edited By Les Jones 1 on 01/07/2015 18:01:51

[Neil WyattModerator @neilwyatt]

That led me to this great entry on WP: en.wikipedia.org/wiki/Alf_Tabb

Neil

[Michael GilliganParticipant @michaelgilligan61133]

It must be the Weather …

Until I saw the subtitle, I thought his thread was about swimming trunks !!

MichaelG.

[Author]

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