Ensure your JUUL, or other compatible e-cigarette, is charged and filled with fluid. To seal the gap between the vacuum motor and the JUUL e-cigarette use a Heatshrink. Put a suitably sized Heatshrink around the end of the JUUL and the "IN" port of the vacuum motor. Next, heat the Heatshrink with a blow dryer until it shrinks tightly around the two items. Do this for both motors and JUUL's. 

Cut two pieces of 8mm plastic tubing as long as you need to go from the motor to the Allentown Mouse Cage. Using the same Heatshrink process as Step 11, use a Heatshrink to secure one end of the tubing to the "OUT" port of the vacuum motor. Do this for both motors.

Using the same Heatshrink process as Step 11 and 12, Heatshrink the loose ends of the plastic tubing to the nozzles that you 3D printed. Once you have this done you should have something that looks like the image below.

Drill a hole approximately 1cm in diameter into the end of each Allentown mouse cage. Position these holes in the middle, 5cm above the floor of the cage. Next, you can push the ends of each of the nozzles into their corresponding Allentown mouse cages. After this you should have something resembling the image below. 

Open the Arduino software that was set up in Step 1. Download the code file here. You can also copy and paste the text of the code here if the ".ino" file does not work. Both of these files can be found in the "Files" section. Plug your Arduino device into your computer using the USB. Verify and save your code with the check mark in the top left corner. Ensure your Arduino board is recognized and selected at the top then download the code onto the Arduino using the arrow beside the check mark. The lights on the Arduino will flash consecutively to show that the board received the code.  

Note: the delays in the code can be played with. Right now it pumps out vapor for two seconds, then pauses for four seconds, then repeats. To customize the interval time the code has to be adjusted. In the brackets after “DELAY” input the number of seconds (x1000) of vapour administration, followed by the number of seconds (x1000) of rest.

The code will run automatically when the device is given power. Ensure the Arduino USB is plugged into an outlet (or other 5V source) and the adjustable voltage source is plugged into an outlet. I found that turning the dial to approximately 6V provided the thickest cloud of vapor. Make sure to refill the JUUL pods and recharge the JUUL cartridge regularly for optimal performance.