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Are all bike computers affected by temp?

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01 / Original postAre all bike computers affected by temp?John Latter · 24 Jan 2004 02 / This pagePosts 1–8Page 1 of 1 · chronological order 03 / Latest replyPost #8John Latter · 25 Jan 2004

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Original section
UK and Europe
Published
24 January 2004
Last activity
25 January 2004
Original author
John Latter
Posts
8
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Public discussion
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966
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0
Topics
Cycling computers

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  1. Original post
    John Latter
    Archived post
    #1

    Hi,

    I recently tried a Halfords wireless cycle computer (£8.99) but when I went for a ride this morning
    the screen was covered with dark 'blotches' which slowly moved about.

    After exchanging it, and looking at the Halfords assistant's own catseye computer, we came to the
    conclusion that the blotches were due to the temperature (43 degrees f but 'feels like' 34 degrees f
    - according to my weather forecast which I get from a station only a coupla miles away).

    Are any other makes of cycle computers affected in this way? As I say, the catseye one was fine.

    --

    John Latter

    Model of an Internal Evolutionary Mechanism (based on an extension to homeostasis) linking Stationary-
    Phase Mutations to the Baldwin Effect. members.aol.comTEM.html

    'Where Darwin meets Lamarck?' Discussion Egroup groups.yahoo.comevomech

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  2. Pete Biggs
    Archived post
    #2
    John Latter said:

    Are any other makes of cycle computers affected in this way? As I say, the catseye one was fine.

    It's common for cold to make the screen go dim and slow with various makes. Some displays can
    temporarily darken from sunlight.

    ~PB

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  3. davebee
    Archived post
    #3

    My Cateye cordless 2 struggles with temperatures that are below 0 degrees C. I think it is a common problem to do with the fluid that is used in the screen.

    Report
  4. Mseries
    Archived post
    #4
    Pete Biggs said:
    John Latter said:

    Are any other makes of cycle computers affected in this way? As I say, the catseye one was fine.

    It's common for cold to make the screen go dim and slow with various makes. Some displays can
    temporarily darken from sunlight.

    ~PB

    During the heat wave in August my car was parked outside in a compound near Stanstead Airport. The
    LCD wireless/clock display was permanently damaged by the heat in the car. I have seen strong
    sunlight temporily damage it but now it will not go back to normal.

    Report
  5. Martinm
    Archived post
    #5

    John Latter <[email hidden]> wrote in message news:<[email hidden]>...

    Quoted message said:

    Hi,

    I recently tried a Halfords wireless cycle computer (£8.99)

    snippity>

    Is that the RRP or a sale price? I bought one a couple of years ago and have had nothing but trouble
    (mainly failure of the main unit to pick up a signal, on this basis I shun wireless on anything
    other than a front-susp), but at that price I'm willing to junk it and give H****ds another try, at
    least I can upgrade it if no good.

    ps mine seems to be temp sensitive in its sending abilities. MM

    Report
  6. Graeme
    Archived post
    #6

    John Latter <[email hidden]> wrote in
    :"]news:[email hidden]:

    Quoted message said:

    Are any other makes of cycle computers affected in this way?

    The properties of the liquid crystal in the display change at very low and very high
    temperatures. At low temperatures it can appear to have a fairly slow response (if at all) and
    some of the normally blank bits of the display show the blotches you described. At high
    temperatures I've been told that the liquid can partially disperse (through evaporation?)
    resulting in a permanently knackered display. I can't give you a super technical description
    behind why, as I read the explanation some years ago (14?), but I've seen both of these problems
    occur in decives with LCD displays.

    CHeers,

    Graeme

    Report
  7. John Latter
    Archived post
    #7
    (MartinM) said:

    John Latter <[email hidden]> wrote in message news:<[email hidden]>...

    Quoted message said:

    Hi,

    I recently tried a Halfords wireless cycle computer (£8.99)

    snippity>

    Is that the RRP or a sale price? I bought one a couple of years ago and have had nothing but
    trouble (mainly failure of the main unit to pick up a signal, on this basis I shun wireless on
    anything other than a front-susp), but at that price I'm willing to junk it and give H****ds
    another try, at least I can upgrade it if no good.

    ps mine seems to be temp sensitive in its sending abilities. MM

    It's the sale price - I think they normally retail at £14.99

    --

    John Latter

    Model of an Internal Evolutionary Mechanism (based on an extension to homeostasis) linking Stationary-
    Phase Mutations to the Baldwin Effect. members.aol.comTEM.html

    'Where Darwin meets Lamarck?' Discussion Egroup groups.yahoo.comevomech

    Report
  8. John Latter
    Archived post
    #8
    Graeme said:

    John Latter <[email hidden]> wrote in :"]news:[email hidden]:

    Quoted message said:

    Are any other makes of cycle computers affected in this way?

    The properties of the liquid crystal in the display change at very low and very high temperatures.
    At low temperatures it can appear to have a fairly slow response (if at all) and some of the
    normally blank bits of the display show the blotches you described. At high temperatures I've been
    told that the liquid can partially disperse (through evaporation?) resulting in a permanently
    knackered display. I can't give you a super technical description behind why, as I read the
    explanation some years ago (14?), but I've seen both of these problems occur in decives with LCD
    displays.

    CHeers,

    Graeme

    Thanks Graeme - and thanks to Pete, Davebee, & MSeries.

    Overall, although I appreciate that LCD displays are affected by temperature, it was noticable that
    the Halfords assistant's catseye computer (an old & knocked-about looking thing!) wasn't affected in
    the same way.

    Also, some of the comments made refer to temperatures below freezing point while the temperature at
    the time the blotches appeared was still one or two (or even a few) above freezing.

    Halfords have some good proces on computers at the moment but I'm going to look at another
    manufacturer! (going to ask 'bout raleigh ones in another post).

    Thanks for your help - I really do appreciate it! 🙂

    --

    John Latter

    Model of an Internal Evolutionary Mechanism (based on an extension to homeostasis) linking Stationary-
    Phase Mutations to the Baldwin Effect. members.aol.comTEM.html

    'Where Darwin meets Lamarck?' Discussion Egroup groups.yahoo.comevomech

    Report

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