Keypad based garage door access

Garage is one place that need to be protected but also has to be convenient to access. When driving in and out a remote control is great choice. SamJBoz had a problem with his remote control so he decided to build in a keypad controlled system based on arduino. Keypad system uses 4 digit pin codes for opening lock. Each family member has its own pin code. User with master code can enter and delete new users. Arduino Pro Mini sits on a custom PCB which has necessary connections for keypad, Piezo buzzer, LED and other. Eagle files are available for download. Continue reading

Fully featured Arduino based code lock

If you have a door lock that is activated with solenoid, then probably you would like to have a keyless access. This can be done easily with Arduino, keypad, LCD and relay which activates lock mechanism. Praveen has shared a second version of code lock he built. In previous version he simplified too many things like, no LCD, hard coded password. This time he wanted to make things better and included all missing parts. During initialization, user is prompted to enter a password which also can be changed later. Using LCD made it much easier to enter passwords navigate menu and debug program itself. Continue reading

Arduino powered keypad entry system

Carrying keys isn’t always convenient – you forget them, loose them well and nobody has a chance to enter without you near by. All these problems might be solved with keypad entry system. College students like this solution and do them a lot. So here it is one simple and pretty ‘messy’ solution if we can say so. The brain role again is taken by Arduino Uno which reads keypad and drives stepper motor using motor driver board. Inside room electronics is placed in tin box with couple knobs that forse motor to open shaft when leaving. On the front of the door is another nicer box with keypad and power button. In order to enter code and activate system person has to turn power first and then enter code. This ensures that power is off when not needed. Continue reading