How do car blinkers and intermittent wipers work?

[Java Lisper]

How do car blinkers and intermittent windshield wipers
work?

Do they work the same way? (I'm talking about the
how it's turned on and off.)

Do they use relays? If you give me brief answers,
I can probably get fuller descriptions by
googling. Thanks.





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[JeffM]

Car blinkers have thermal interrupters:
the more current they pull, the faster they blink.
Left blinker faster than the right?
Probably a burned out bulb.

Intermittent windshield wipers do use a relay.
A variable-period / constant on-time timer drives it.

 

[Nirodac]

Ah, not that I want to be picky but some flashers use relays also. Mostly
the ones marked "Electronic"

"JeffM" <jeffm_@email.com> wrote in message
news:f8b945bc.0311071622.72cb000d@posting.google.com...

Car blinkers have thermal interrupters:
the more current they pull, the faster they blink.
Left blinker faster than the right?
Probably a burned out bulb.

Intermittent windshield wipers do use a relay.
A variable-period / constant on-time timer drives it.

 

On 7 Nov 2003 16:22:08 -0800, jeffm_@email.com (JeffM) wrote:

Car blinkers have thermal interrupters:
the more current they pull, the faster they blink.
Left blinker faster than the right?
Probably a burned out bulb.

Intermittent windshield wipers do use a relay.
A variable-period / constant on-time timer drives it.

Most intermittent wiper circuits do the equivalent of turning on the
slow speed for about 1/2-second - just enough to move the wipers out
of there 'parked' position. From there the normal park circuit
completes the sweep.

-Chris