Introduction: IN-STOP

Picture of IN-STOP

The purpose of this innovation is to provide increased security for classrooms. This lock utilizes a mechanism that will allow for only one authorized person to allow or deny access to a classroom, said authorized person typically being a teacher or administrator. The assembly consists of an electromagnet powered by a motor driver, which is controlled by a micro-controller. The micro-controller's code unlocks the door in the presence of an NFC tag. An adjustable timer allows for a delay in re-locking the door.

Step 1: Parts List

Step 2: Electronics

Picture of Electronics

1. Mount NFC shield to Arduino

2. Pin 11 to data wire on motor driver

3. 5V pin and GND to respective ports on motor driver

4. Connect 9-volt supply to motor driver.

5. Connect electromagnet leads to motor input on motor driver. (In my case, M1A and M1B)

6. Connect Arduino to a computer and upload the provided code.

Step 3: CODE

The following code will be used to run the IN-STOP electronic closing mechanism.


About This Instructable




Bio: The BCAMRL is a Mechatronics Research Lab, found in 2014 on the campus of Bergen County Academies a magnet high school within the Bergen County ... More »
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