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

Step 1: 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

<p>Can you give me a sketch of keypad 4x4?</p>
<p>#include &lt;Keypad.h&gt;</p><p>const byte ROWS = 4;<br>const byte COLS = 4;<br>char keys[ROWS][COLS] = {<br> {'1', '2', '3', 'A'},<br> {'4', '5', '6', 'B'},<br> {'7', '8', '9', 'C'},<br> {'*', '0', '#', 'D'}<br>};<br>byte rowPins[ROWS] = {2, 3, 4, 5}; //connect to row pinouts<br>byte colPins[COLS] = {6, 7, 8, 9}; //connect to column pinouts</p><p>Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );</p><p>void setup() {<br> Serial.begin(9600);<br>}</p><p>void loop() {<br> char key = keypad.getKey();</p><p> if (key != NO_KEY) {<br> Serial.println(key);<br> }<br>}</p>
<p>it is saying there is no keypad.h</p>
<p>you problably dont have that library installed... download that library... then go to arduino's folder and put the library inside a folder called libraries</p>
<p>How does it work if i have a 3x4 keypad is it the same but instead of using 8 pins i use 7 ?</p>
<p>you will have to redefine the keymap to fit your keypad</p>
<p>So if I want to make the arduino open a garage door when pushing the right password followed by &quot;A&quot; and turning on and off alarm by pushing the right password followed by &quot;B&quot;. Can anyone help me do that. Thank you in advance</p>
<p>Sup, i tried to make this for my own too but i have a small Problem. (First Project)</p><p>C:\Users\(Censored)\Desktop\Keypad_servo\keypad_password_servo_ v1.1\keypad_password_servo\keypad_password_servo.ino:5:23: fatal error: Password.h: No such file or directory</p><p> #include &lt;Password.h&gt; </p><p> ^</p><p>compilation terminated.</p><p>exit status 1</p><p>Fehler beim Kompilieren. (German: Failure)</p><p>Can you help me?</p>
<p>can somebody tell me what is the password?</p><p>i have me the circuit. but its not working without password</p>
<p>i can't find the code plzz help me</p>
I made it... Thanks a lot
can i use arduino mega?
Of course, you can!
<p>@<a href="http://www.instructables.com/member/camilo.n1012/" rel="nofollow"><strong>camilo.n1012</strong></a></p><p>do we have to use the resistors for the keyboard?</p>
No, keypad library uses internal pull up resistors
<p>I cant get it working,when I enter the password and press A nothing happens</p>
<p>Thanks </p>
<p>When I plug in my servo to my arduino it starts spinning without stopping. How do I fix this?</p>
<p>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 </p>
Hi, you can download the file from this link: http://goo.gl/ChO877
<p>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?</p>
Hi, i don't understand your question on the issue, if you can be more explicit to help I'd appreciate. Regards !
<p>@camilo.n1012 , please when i write #include &lt;Keypad.h&gt; , 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 ?</p>
You may have problems with the address of the file, check in the folder &quot;/ libraries&quot; 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 !!
Where is the code of project ?
Hi, you can download the code from here: http://www.instructables.com/files/orig/FKM/G6W9/HYR3FXB9/FKMG6W9HYR3FXB9.zip
<p>seem it cannot be found...can you please give the right link?</p><p>your help is much apreciated.thank you</p>
<p>This is the new link: <a href="http://goo.gl/2Lo0fC" rel="nofollow">http://goo.gl/2Lo0fC</a></p><p>Good Luck !</p>
<p>donde va el password como lo meto porque si lo dejo en letras negras me da error</p>
<p>Hola ! El pasword lo defines en el mismo archivo .ino, en la variable &quot;Password password = Password( &quot;your_password&quot; );&quot;, ubicada en la linea 20 del codigo, de todos modos te dejo la imagen de muestra.<br>Saludos y &eacute;xito !</p>
<p>Sorry for not having answered the guys posts, but I had a problem with the mail.</p><p>The code already update, if they have more doubts, I can write to me mail camilo.nunez@cnf.cl or send a MP.</p><p>Regards !</p>
Camilo.n1012 the code needs to be updated
I can't get the password librarie
camilo.n1012, the code isn't updated and needs to be so that it will continue to work. Please update it soon. <br> <br>-Thanks
<p>The BYTE term seems to be invalid for Arduino 1.X<br><br>I am getting same error too. Please update this Instructable, thanks.</p>
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 <strong>keys</strong>.
The BYTE term seems to be invalid for Arduino 1.X, what version did you use? <br>I'm trying to convert. Can you update this Instructable? or add updated code? <br>Thanks
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: <br>http://playground.arduino.cc/Code/Password
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. :)
ralphlouietionghoy@ymail.com i forgot to attached my email tnx :)
i need the codes for 4x3 wahahhahaha <br>nice instruction by thw way :) <br>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&acute;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. <br>Thanks, Austin
how do i change the password, by the way NICE TUTORIAL

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