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Subject: Re: Electronic Golf Putting Machine

Date: 11/03/02 at 2:06 PM
Posted by: Ray
E-mail: rrogers@plaidheron.com
Message Posted:

In Reply to: Re: Electronic Golf Putting Machine posted by Darren on 11/03/02 at 12:56 PM:

The LM555 description is at:

http://www.national.com/ds/LM/LM555.pdf

A time delay circuit using this is in the delay section of:
http://home.cogeco.ca/~rpaisley4/LM555.html#20

You want to use a LM556 instead of two LM555's.
If a suitable 200ma soleniod is used then the standard (not CMOS) LM556 will drive it.
Don't forget to use a clamping diode on the solenoid.
The solenoid goes from the output to ground.
Use a Wall-Wart (say from Radio Shack) of about 9V with a sufficient amount of current for the solenoid.
The switch is the right trigger input.
The 555 series are nice since they are pretty rugged; forgiving of mistakes.

Of course all of this is "off the cuff" so you must double check everything; I am notorious for getting something wrong the first time through. I always double check values, loads, interfaces, etc....

Do I get a "A" in your class? You should have really figured or found most of this yourself.
Hopefully you will learn what you are supposed to in spite of, or as a result of this help.
I will not be there for your test.
I don't mind pointing out the right direction but if you don't bother to learn what you should then the help is wasted.


Ray


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