Arduino pins 6, 7, 8, and 9 should connect to the four output lines marked SWT-GND1, SWT-GND2, SWT-GND3, and SWT-GND4 (1-4 on the schematic). The final version of the board takes a 12VDC input to ...

Make Your Own Arduino Header Pins. 61 Comments . by: Al Williams. ... When you notice the pins aren’t on 0.1 inch centers, ... ← All I Want For Christmas Is A 4-Factor Biometric Lock Box.

The DIY biometric lock is also equipped with three push buttons and a 16×2 LCD display. “This is a security door lock with fingerprint sensor. It is able to record all the door actions to and ...

Components and Functionality. The Arduino biometric lock box is equipped with an infrared sensor which checks to see if the door is closed, ensuring that the lockbox is secure at all times.

Unfortunately, the pins can only be used for one function at a time, so that means that when you're communicating with the computer — such as when printing data to the Serial monitor with Serial ...

This kit uses a CD-ROM drive and an Arduino board to build a clever robotic lock. This dude used a bolt to create the project and it's voice activated.