Need a lock-up circuit for a 12 pump/level control

[geronimo]

Its for a fluid tank that will be mounted in a car, and be kept
full using a level switch and a windshield washer fluid pump. So the
closed/low level signal from the level switch needs to be conditioned
so that the pump isn't triggered on by normal sloshing around, but
only by the switch staying closed for a minute or so. I am thinking
this might be something that a 555 timer chip could handle?

 

[Uncle Monster]

geronimo wrote:

Its for a fluid tank that will be mounted in a car, and be kept
full using a level switch and a windshield washer fluid pump. So the
closed/low level signal from the level switch needs to be conditioned
so that the pump isn't triggered on by normal sloshing around, but
only by the switch staying closed for a minute or so. I am thinking
this might be something that a 555 timer chip could handle?

Ready made:

http://www.altronix.com/index.php?pid=2&model_num=6062

Kits:

http://electronickits.com/kit/complete/elec/ck1605.htm

[8~{} Uncle Monster