Access control with Arduino + Keypad 4x4 + Servo (UPDATE)

Picture of Access control with Arduino + Keypad 4x4 + Servo (UPDATE)
Hi guys, I bring a new instructable for arduino, the control access with password, 4x4 keypad and a servo.

We will use the Password and Keypad librarie for arduino, besides using the servo library, but this project can also be modified by changing the servo, a motor reley or motor stepper, or any other ideas ...

This project can be used in different cases, for doors, Servo action, etc.. Here is the link of the video on youtube to see how it works, then explain step for the armed : D

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Step 1: The parts for the project

Picture of The parts for the project
We will need this parts for the proyect:

Arduino UNO or similar ($29.95)

Servo motor - Large ($12.95)

KEYPAD 4X4 (or similar) ($7.79)

Proto Board  ($9.58)

Breadborad jumper wire pack ($10.59)

Four resistor of 910 ohm

One resistor of 1k

Step 2: Preparing the keypad

Well, now we must put the resistors,remember the potion of the pins of the keypad.

Output pins of keypad:

1 pin = col 1
2 pin = col 2
3 pin = col 3
4 pin = col 4

5 pin = row 1
6 pin = row 2
7 pin = row 3
8 pin = row 4

(look at the second image)

Now they must put three 910 ohm resistors on pin 1, 2 and 3 of the keypad, then put in the arduino digital pins of the NEXT form:

pins keypad  |  pins arduino
          1           |           8
          2           |           7
          3           |           6
          4           |           9        
          5           |           5
          6           |           4
          7           |           3
          8           |           2

Step 3: Preparing the Servo

Picture of Preparing the Servo
You need put the servo of the next form :

Step 4: Connecting the LEDs

Picture of Connecting the LEDs
You need put Accepted LED (green) and Denied LED (red) in this way:

Step 5: (UPDATE) And now, the programming

You need this libraries:

Password librarie

Keypad librarie

Well, this is the code for arduino, you only need to change that write in bold and put your password.

And this is my new instructable, enjoy it :D

¡ Good luck !

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can somebody please copy and paste the code into the comment section? I can't seem to access the zip file. I would love to make this but without the code it kinda impossible

camilo.n1012 (author)  Shark1234564 days ago
Hi, you can download the file from this link:
zinedine2 months ago

Hi guy, I have just handmade a matrix keypad for arduino, I'll use that in control driver motor servo 250VAC. But it was noise when I put in the box a metal. It's mean it run, however I didn't pressed keypad. So how about I can filter noise?

camilo.n1012 (author)  zinedine2 months ago
Hi, i don't understand your question on the issue, if you can be more explicit to help I'd appreciate. Regards !

@camilo.n1012 , please when i write #include <Keypad.h> , the keypad word be in black not in red , and when i upload the code , the arduino does not recognize the keypad , is there any solution for that ?

camilo.n1012 (author)  hisham.goda.922 months ago
You may have problems with the address of the file, check in the folder "/ libraries" of Arduino IDE if the file.h is there. It should be in orange the code. If you follow the problem let me know and I give you another solution. Greetings !!
Captura de pantalla 2015-01-25 a las 23.14.46.png
tornado.abood3 months ago
Where is the code of project ?
camilo.n1012 (author)  tornado.abood3 months ago
Hi, you can download the code from here:

seem it cannot be found...can you please give the right link?

your help is much apreciated.thank you

camilo.n1012 (author)  masterji3 months ago

This is the new link:

Good Luck !

When I plug in my servo to my arduino it starts spinning without stopping. How do I fix this?

donde va el password como lo meto porque si lo dejo en letras negras me da error

camilo.n1012 (author)  caserpsychocgo6 months ago

Hola ! El pasword lo defines en el mismo archivo .ino, en la variable "Password password = Password( "your_password" );", ubicada en la linea 20 del codigo, de todos modos te dejo la imagen de muestra.
Saludos y éxito !

Captura de pantalla 2014-09-25 a la(s) 12.36.08.png
camilo.n1012 (author) 7 months ago

Sorry for not having answered the guys posts, but I had a problem with the mail.

The code already update, if they have more doubts, I can write to me mail or send a MP.

Regards !

hayes2558 months ago
Camilo.n1012 the code needs to be updated
hayes2558 months ago
I can't get the password librarie
kschwartz58 months ago
camilo.n1012, the code isn't updated and needs to be so that it will continue to work. Please update it soon.

mekaci899 months ago

The BYTE term seems to be invalid for Arduino 1.X

I am getting same error too. Please update this Instructable, thanks.

r.raj9361 year ago
I made one of this kind and when I was testing there was a power failure and I had to be out till I got my spare keys.
Edward_1 year ago
The BYTE term seems to be invalid for Arduino 1.X, what version did you use?
I'm trying to convert. Can you update this Instructable? or add updated code?
nyatuv1 year ago
can i use arduino mega?
kjsrocks2 years ago
could you use an ir remote insted of a keypad if possible a code too thanks.
Hi! Nice instructable! but the link to the password library doesn't work. here's correct:
Verkyn2 years ago
Hi Sir we are making this arduino project and we would like to do it in a 3X4 keypad because there is no available 4x4. If we would order outside the country it will take much time. We would like to ask you if you a have a program of a 3x4 access controller we urgently need it. Thanks a lot it would be a big help for us. :)
tolstoyan2 years ago i forgot to attached my email tnx :)
tolstoyan2 years ago
i need the codes for 4x3 wahahhahaha
nice instruction by thw way :)
i also dont know how to change the password? do i have to type my desire password to the code? teach me!!! hahahah im new to arduino hehehe tnx :)
sorry ment 910 ohm resistor
hi, can u give some advice how to start a timer when the password is true? i´m trying but still cant( new at the arduino).
Hello, How would the programming differ if a 4X3 keypad were used? I dont really want mine to have the ABCD, but this is a great instructables.
Thanks, Austin
davila12 years ago
how do i change the password, by the way NICE TUTORIAL
camilo.n1012 (author)  davila12 years ago
Hi davila, to change the password, please go to line 5 of the code, which states Password password = Password ("your_password"); . Good luck !
thanks a lot keep doing this staff
ElStevie2 years ago
Hey Camilo, thanks for the instructable. But I can't seem to get it working. The Servo (MG995) just goes on and off for a few seconds and then just off and nothing else happens until I restart the Arduino. I'm using an Arduino Diecimila and a membrane 4x4 keypad.

camilo.n1012 (author)  ElStevie2 years ago
Hi Stevie, double check grades you need for your project, if you want that rotation is longer or shorter you have to go to the judgments myservo.write () and set the required value. Tell me if you have more problems. Good Luck
tsoumelee2 years ago
Hi, do you have a failsafe mode in the code (in case of a blackout)? Thanks!
camilo.n1012 (author)  tsoumelee2 years ago
Hi, if you mean a fail-safe mode for a apogan in the arduino code is not very convenient, the best In This case, is to put a batery and connected to Arduino, if you have it connected to AC power you put a diode and put the battery.

Good luck
nice project, but just want mention one thing, the key pad looks too big, get a membrane one so you can stick it on the wall, like this, will be much nice look.
camilo.n1012 (author)  electrodragon2 years ago
Hi, is a very good idea, just need to change the keypad code and change the position of the pins on arduino and I can use a keyboard membranous like this:

If you need the code for a 4x3 keypad just tell me and publishes :)
traisjames2 years ago
What do you use to make the wiring diagrams?
camilo.n1012 (author)  traisjames2 years ago
Hi, i use the Fritzing, you will download here:
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