Arduino Door Lock

Greetings all,

I am planning on making a electronic door lock with the Arduino. I have discovered that there are elderly and disabled people who have nurses come to their home to assist them getting out of bed. The only down side is that the front door would have to be unlocked so the nurse can get in and this poses obvious security risks. I will be making a keypad that is outside the front door so that the nurse can enter a code to get in. The code would only work for the time that the nurse is suppose to come for example 7:30 --> 8:30 if the nurse is suppose to be there at 8:00. There will also be a remote control that the disabled person can use to open the door in case of an emergency. I am pretty sure I have the electronics and programming down my only question is what mechanism can safely lock the door? I would like the device to be under 150$ obviously cheaper is better. I also don't want the device to look bad on the door although it can be over or attached to any part of it. The door would be a standard metal single front door. I would also prefer that the locking device be strong enough to prevent someone from kicking down the door.

Thank you for your help!

Already tought of an electrical striker?

arduinoPi: Greetings all,

I am planning on making a electronic door lock with the Arduino. I have discovered that there are elderly and disabled people who have nurses come to their home to assist them getting out of bed. The only down side is that the front door would have to be unlocked so the nurse can get in and this poses obvious security risks. I will be making a keypad that is outside the front door so that the nurse can enter a code to get in. The code would only work for the time that the nurse is suppose to come for example 7:30 --> 8:30 if the nurse is suppose to be there at 8:00. There will also be a remote control that the disabled person can use to open the door in case of an emergency. I am pretty sure I have the electronics and programming down my only question is what mechanism can safely lock the door? I would like the device to be under 150$ obviously cheaper is better. I also don't want the device to look bad on the door although it can be over or attached to any part of it. The door would be a standard metal single front door. I would also prefer that the locking device be strong enough to prevent someone from kicking down the door.

Thank you for your help!

you do not need electronics for this. Current practice is to have a keysafe operated by a combo lock outside the door. Carers are given the combination to the safe.

Well, what would be better? some type of solenoid or a linear actuator? I may also want the door to open automatically so that the disabled person can exit with their wheelchair

You really need to budget for £500 per door.

Mike may correct me on this as its been a while.

The reason for the lockbox I mentioned is it costs the council a lot less to install.

Door openers are available but costly.

The cheapest lock would be a solenoid release rim lock striker. However at the main point of entry they don't satisfy security or insurance requirements.

Edit. A quick look around indicates you may get one of these fitted for 150.

A 5 lever deadlock is required.

They can be had motor driven but last I looked were over 300 PLUS fitting, allow a days labour for that.

A further thought. If you are trying to make the lock yourself, in order to sell it, it will need to be tested and approved to the relevant national standard or insurers will not want to know.