Summary of Access control with Arduino plus Keypad 4×4 plus Servo
This project demonstrates an Arduino-based access control system using a 4x4 keypad and a servo motor. The system uses Arduino libraries for password management, keypad input, and servo control. It can be adapted with different motors or relays. The keypad is connected to Arduino digital pins with specific resistor placements for proper function, making it suitable for door locks or other servo-driven actions.
Parts used in the Access Control with Arduino plus Keypad 4x4 plus Servo:
- Arduino UNO or similar
- Servo motor - Large
- 4x4 Keypad
- Proto Board (Breadboard)
- Breadboard jumper wire pack
- Four 910 ohm resistors
- One 1k ohm resistor
Hi guys, I bring a new instructable for arduino, the control access with password, 4×4 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..
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 1: The parts for the project
We will need this parts for the proyect:
Arduino UNO or similar ($29.95)
http://www.sparkfun.com/products/11021
Servo motor – Large ($12.95)
http://www.sparkfun.com/products/9064
KEYPAD 4X4 (or similar) ($7.79)
http://www.ebay.com/itm/DATA-KEYPAD-4X4-BLACK-BLACK-KEYS-4-4-Switch-Key-x-/270347954381?pt=UK_BOI_Electrical_Components_Supplies_ET&hash=item3ef1fe68cd#ht_2720wt_1037
Proto Board ($9.58)
http://www.olimex.cl/product_info.php?currency=USD&products_id=170&product__name=Proto_Board_Bread_board
Breadborad jumper wire pack ($10.59)
http://www.olimex.cl/product_info.php?cPath=21_138&products_id=872&product__name=Breadborad_jumper_wire_pack
Four resistor of 910 ohm
One resistor of 1k
For more detail: Access control with Arduino plus Keypad 4×4 plus Servo
