Talking about electronics.

• After making the circuit diagram I transformed it into a PCB design to produce it, to produce the PCB, I have chosen JLCPCB the best PCB supplier and the cheapest PCB provider to order my circuit. with the reliable platform, all I need to do is some simple clicks to upload the Gerber file and set some parameters like the PCB thickness color and quantity. I’ve paid just 2 Dollars to get my PCB after five days only, what I have noticed about JLCPCB this time is the "out-of-charge PCB color" which means you will pay only 2 USD for any PCB color you choose.

Related Download Files

As you can see in the pictures above the PCB is very well manufactured and I’ve got the same PCB design that we’ve made for our main board and all the labels and logos are there to guide me during the soldering steps. You can also download the Gerber file for this circuit from the download link below in case you want to place an order for the same circuit design.

• Connect the programming cable to Arduino Nano And PC.
• Paste the code given and Upload the code.
• Note: 1) Make sure Arduino is not connected with the circuit before coding, as it may lead to error.
• 2) Before Uploading the code select the desired COM Port and Board Type to Arduino Nano.

Connect the +(ve) Red wire

Connect the -(ve) Black wire of solenoid to the Right side screw terminal of 12v.

Connect a wire from right side of screw terminal in front of Relay to the Left side of screw terminal of 12v.

Note: Please follow the image to get more clear idea about the connections.

Connect the female DC Jack +(ve) to +(ve) (left side of 12v screw teminal) and -(ve) to -(ve) (Right side of 12v screw terminal).

Place All the Circuit and cover the box.

Testing:

• Connect the 12v DC adapter, red power led will indicate on device.
• Open the application on your Smartphone, connect the HC-05 Bluetooth Module with app.(If you are connecting HC-05 for the first time, It will ask for a password which is usually "0000" OR "1234")
• Now, whenever you want to unlock the SmartDoorLock, Click on the fingerprint icon and then place your finger which you use to unlock your device and your door lock will unlock for 4 Seconds Only. (Locks after 4 seconds automatically)
• Note: The Lock will unlock only when you place Finger which you use to unlock your device. It will also not work if there are three consecutive unauthorized attempts.

New users will also get some coupons while registering at JLCPCB via this blue link.

Thank you for reading this guide, hopefully, this guide provides full steps to help you to create your ownSmartDoorLock.If you have any questions please post them in the comment section below.