Need help for a Timer

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Forum Name: Relays
Forum Discription: Relay Diagrams, SPDT Relays, SPST Relays, DPDT Relays, Latching Relays, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=18094
Printed Date: July 20, 2025 at 6:08 AM

Topic: Need help for a Timer

Posted By: knightkarr
Subject: Need help for a Timer
Date Posted: August 26, 2003 at 9:36 AM

Hey fellas I'm new here. I've searched around but haven't specifically found what i've been looking for. I was interested in building a switch for my water pump that would shoot water to my intercooler. I was interested in adding different timing as the switch (or pot) is turned to a higher number (kinda like windshield wipers). Thanks guys

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- Carlos

Replies:

Posted By: xetmes
Date Posted: August 26, 2003 at 9:50 AM

yea it can be done if you dont mind som electronics, how fast is the slowest you want, and fast is the fastest?

Posted By: auex
Date Posted: August 28, 2003 at 10:06 PM

How are you looking to do this? Do you want to just push a button and have it spray for a couple of seconds or longer? Give some specifics.

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Posted By: chall
Date Posted: September 04, 2003 at 6:20 PM

You can accomplish this by using a 555 chip, do some research on it, you can adjust the amount of time the chip can drive a relay by changing the values of capacitance and resistance. It's a very common chip with lots of information on it with a little searching you should be able to find what you need.

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