There is a short video for this Arduino fingerprint lock here: http://v.youku.com/v_show/id_XNjIxNzQyNzY4.html

I live in a small apartment in Shenzhen with my wife and baby, 5 months old.  Sometimes, I need to go out, for example, to go downstairs to buy candy or diapers for my baby. But always I forget to carry my keys, so I need to knock at the door or call my wife to open the door for me, and, always wake up my baby and begins to cry.

At this time, I am so guilty. So i decide to think of a way to fundamentally solve the problem.

A fingerprint lock would be help for me, and there are plenty of these kinds of locks on the market, as the picture above. But it is not only expensive, and, it is also very troublesome to install. I hope to find a cheap way and do need not change my  locks.

After learning Arduino for 2 weeks, I decided to DIY a fingerprint lock, with Arduino.

Step 1: Solution and Module Preparing

First, I observed the door of my house, as the picture above.

As you can see, as long as the red part of the figure pulled in the direction of the arrow, the door can be unlocked, and of cause, when not pulled, the red part go back to it’s original location to lock the door. So I think, a servo would be OK to accomplish this function.

And, i need a fingerprint sensor, too, when i or my wife press the fingerprint sensor, which can determine whether a person is certified, it outputs instructions to the Arduino, to control servo to open the door.

I use the following modules:
1. Crowduino,this is an Arduino compatible microcontroller boards, i use it because it is cheap enough, and has some upgrading on the design, such as the reset button on the side.
2. FingerPrint  Sensor
3. A servo with enough torque.
4. Glue,or anything that can be used to fix these modules
5.  5V USB power supply or 9V DC jack power supply
6. Some jumper wires would be help.
Nice. i wonder if you could make it an eye scanner? Im not electronically inclined. But think how nice it would be if you could walk up arms and hands full, look in a peephole, and the door unlocks and you tap it open with your foot.
Found an infrared &quot;eye scanner&quot; here. <br>http://www.ebay.com/itm/Mini-Camera-Pinhole-Video-Audio-Security-Color-Infrared-1-3-CMOS-Monitor-HE-/141076628111?_trksid=p2054897.l4275. So hardware wise seems like it would be cheap.
Even better. Just noticed the camera has audio so you could make it an eye scanner with voiceprint id and maybe even set up different words for different actions. Like maybe unlock the door but set off a silent alarm or call the police. I wish i knew how to build it myself. I could make a fortune with it. ok patent pending.
<p>Since it lets you store up to 20 prints, you could use different fingers for different situations. I.E. use the middle finger normally, and the index for emergencies (since people would expect you to use the index finger or thumb for scans).</p>
<p>The problem with this kind of device is that it is relatively easy to overcome with a crowbar and a power supply. To make this work better, the microcontroller (especially an arduino which can be somewhat easily reverse engineered to get the source code) needs to be inaccessable from the outside. Additionally, you need to create the circuitry so that it sends a specific command at a specific frequency (like remotes do to turn on TVs), so that if someone tried to just apply power, it wouldn't activate the motor or servo. Food for thought! </p>
<p>HI help me out..</p><p>I am connecting r305 fingerprint module with arduino using adafruit library with esp8266 wifi module..</p><p>my problem is when the fingerprint module doesn't get any input it goes to sleep and when i open the serial monitor in arduino ide it wakes up again..</p><p>is there a solution or any hint..</p><p>cheers..</p>
<p>Now i'm trying to do Wallet locking by Arduino Uno. Please any one help to do it.</p>
<p>I want to try</p>
<p>guys I have to do a Project for a Higher National Diploma For Networking Please Give me a Titile and Step Please It['s a big help </p><p>Gmail : minsaf2@gmail.com</p>
Please tell me can I use arduino uno to make this project? Please reply soon.
<p>Yes you can because Crowduino is a clone of Arduino UNO.</p>
<p>hi jack, I've read your project and it was cool, and check PM please, thank you</p>
<p>your project is really cool!!!, by the way can I asked for the code on how to interface the fingerprint sensor to an arduino......I really envy your project</p>
Can this be done with any fingerprint sensor?
jack i live in shenzhen too,i have QQ: 2407767157 and my WeChat id is : valinia glad to be in contact with you
hi, i have added you to my QQ friend. please free to contact to me, with any , any thing . :)
Dang it you made it before I got to it! This was literately the next thing on my list to make! Hahaha well good job! Did you enter it for the MicroController Contest?
Thank you very much for your remind! I have add it to the MicroController contest.
Superb ! This *duinos are such beasts :-)
So glad to see that you are putting a newly learned skill to work solving real-world problems. Well done and very well written!

About This Instructable


944 favorites


More by jack1986: Say Hello with My Roommate Mouse with Arduino Arduino Automatic Temperature& Humidity Controller for Pets Arduino Fingerprint Lock
Add instructable to: