# ic cd4066, help!

#### 2sisoko

Aug 14, 2011
3
hi, I want to do this water sensor:

http://www.electronic-circuits-diagrams.com/alarmsimages/6.gif

All correct, but my problem is with integrated circuit CD4066, may u give me information about it? where i have to put it, how...
My other question is with ¿logical gates? I don't know what are squares below the LED's.

I'm begginer at this...

#### jimwill48

Sep 2, 2010
22
Take a look at switchs S1-4 each one is 1/4 of the 4066. When you look at the drawing you can read the correct pinout for the ic.

Jun 10, 2011
443
To expand on Jim's answer, the boxes each represent a switch in the CD4066 IC. The drawing would make more sense to beginners if all of the switched were put into one box. However, what's shown is a fairly common way of doing things -- and the clue as to what's going on is the numbers by each lead on each box -- these are the corresponding pins on the IC. A slightly easier to understand drawing would have included a notation such as U1a, U1b, etc. by each box to indicate that they were all part of the same IC. However, the notation is given that S1 through S4 are all part of the same IC, so the drawing is adequate.

#### (*steve*)

##### ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
Moderator
Jan 21, 2010
25,508
And to expand further, all the "switches" in a 4066 are the same, so it doesn't matter which one you use in which place in the circuit (as long as you use matching in/out/control pins!). Oh, and in/out can be swapped too -- they're symmetrical.

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