RE: LRO: Slowing down windscreen wipers

From: Easton Trevor A (trevor_easton@dofasco.ca)
Date: Wed Jun 06 2001 - 11:52:37 EDT

  • Next message: Jeff Berg: "RE: LRO: Slowing down windscreen wipers"

    Then off course there's always the switch conveniently provided by Mr Lucas
    :-)

    > The idea with the park position sensor, is that the intermittent wipe is
    > achieved by a PWM with a variable frequency in the O to .5Hz and a
    > variable
    > mark space ratio between 0 and 100%. . Thus .1 hz at 50% would give 5 secs
    > on and 5 secs off, at 10% would give 1 sec on 9 secs off. at 100% always
    > on
    > at 0% always off. etc
    >
    >
    > You work too hard - that can easily be achieved with a simple timer
    > circuit
    > outputting a fixed-duration pulse at a variable timing window. With the
    > park position available as you say, a simple relay-driving pulser would do
    > the job here.
    >
    > a 555 set up as an astable multivibrator would be just the ticket...
    >
    > aj"Tech weenies R. Us"r



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