How to build a clock that projects time on the wall

Step 5 Installing the devices in the box

Once your rail and optic are ready, install them into the box. Drill a hole to let the light out of the box. Drill two other holes for the fresh air to come in and the hot one to go out. Try as much as possible to have a clear flow of air in the box by forcing the air to flow on the LCD and then on the light bulb. Always let the flow go from lower to higher temperature so that hot air from the bulb in our case does not heat the LCD.