A “Smart Mirror” functions as a two-way mirror, with a display mounted behind it. This setup is used to show various types of information, such as the time, date, weather, calendar, and much more. Smart mirrors are quite versatile and can be used in numerous spaces, including bathrooms, kitchens, or as vanity mirrors.
In this guide, the process of building a DIY Smart Mirror is simplified and presented step by step. The goal is to demonstrate that constructing a Smart Mirror is not as complex as it might initially seem and to encourage anyone to give it a try using readily available materials.
Framed Smart Mirror (Photo: Alamy)
Step 1: Cut the Wood for the Back Frame
The design involves using a standard picture frame and extending its back to create enough space for components like the monitor and Raspberry Pi. The back frame is constructed from 3/4″ plywood with the necessary strips being cut into specific sizes.
The required dimensions are four strips measuring 1.75″ in width, and two additional strips of 1.5″ width. A 1/4″ reveal is left around the frame edges. For example, for a frame of 18″ x 24″, the longer strips are cut to 25.75″ and the shorter strips to 18.25″.
Tip: For those without a saw, stores such as Home Depot are helpful, as they will often cut the plywood based on provided measurements.
The other two 1.5″ wide strips should be cut to the required length later on, but for now, they must be at least 25″ long for safety.
The assembly of the frame requires the use of pocket holes. The pocket hole jig is adjusted to a 3/4″ cut, after which two holes are drilled into the shorter side pieces.
Step 2: Paint and Assemble the Back Frame
After experimenting with various paint options, black acrylic paint was chosen for its close match to the black frame color. The plywood pieces were painted to achieve a consistent look.
Once dried, vertical pocket holes were made on each piece to connect them to the back of the picture frame. It’s important to note that this step can be completed before painting, though it was overlooked here.
The pocket holes are positioned 3″ in from each end, and the depth must be accurate. These holes are drilled from the back, so if they are too deep, the screws may protrude from the front of the picture frame.
The frame is then assembled by attaching the pieces using pocket screws, ensuring the corners remain square throughout the process.
Step 3: Attaching the Frame to The…Frame
To begin this step, the picture frame is flipped face down. The back frame is placed atop it, and a small amount of super glue is applied to help hold it in place before securing it with pocket screws.
It’s crucial to ensure the back frame is centered on the picture frame’s back. If clamps are available, they are useful to ensure a snug fit while the pocket screws are attached. Two screws are added on each side for a solid hold.
Step 4: Installing the Two-Way Mirror
The smart mirror functions using a “two-way mirror” (sometimes called a one-way mirror, though this can be confusing!). A two-way mirror allows light to pass through one side, while the other side is reflective. This unique property enables a display or monitor to be mounted behind the mirror, allowing light to pass through the reflective surface.
The mirror being used is 1/4″ thick, high-quality glass that provides excellent light transmission while maintaining a sharp reflection. However, these mirrors tend to be expensive. For those working on a budget, an acrylic mirror could be a more affordable alternative.
To install the mirror, the clear plastic and cardboard backing are removed from the picture frame, with the cardboard saved for later use. The small metal tabs are folded up to create space for the mirror.
Next, the mirror is gently placed into the frame, with the reflective side facing outward and the dark side facing the back. After it’s positioned, the metal tabs are bent back to secure the mirror in place.
Step 5: Disassembling the Computer Monitor
The monitor is powered on and its brightness is set to maximum. The stand at the bottom is removed, and the monitor is carefully laid face down on a soft surface to avoid scratches.
Small screws near the power and HDMI ports are unscrewed and set aside for future use.
A flathead screwdriver is used to detach the back panel, revealing additional screws around the edges that are then removed. The front bezel is carefully lifted off, and the button set at the bottom of the monitor is removed to avoid damage.
The cardboard piece from the picture frame is used to create a precise cut-out for the monitor. The monitor is traced onto the cardboard, and a sharp utility knife is used to cut out the rectangle, ensuring a close fit.
Step 6: Install the Monitor Into the Picture Frame
After ensuring the mirror is clean with a microfiber cloth, the cardboard is placed back into the frame. The monitor fits perfectly into the space created for it, facing the back of the mirror.
A hot glue gun is used to secure the monitor to the board around the edges. If the cut-out is larger than the monitor, tape may be used around the edges to prevent light from escaping.
Step 7: Attaching the Back Strips to Secure the Monitor
The two remaining plywood strips are cut to the exact size and attached to the back of the frame to securely hold the monitor in place.
After marking and cutting the strips to size, pocket holes are drilled at the ends of each strip. The first strip is positioned at the bottom of the monitor to support its weight, while the second is placed about three-quarters of the way up the monitor’s back to provide additional support.
These strips are each 1/4″ smaller than the outer frame to accommodate the cords running behind them.
Step 8: Assembling the Raspberry Pi
The Raspberry Pi is used as the power source for the Smart Mirror. It’s recommended to purchase the full kit, which includes all the necessary components, including a suitable case.
The memory card is inserted into the Pi and placed in the case. The power and HDMI cables are connected, and a keyboard and mouse are plugged into the USB ports.
After powering up the Pi, the on-screen instructions guide through the setup process, including questions about timezone and Wi-Fi.
Step 9: Installing and Customizing the Magic Mirror Software
The “Magic Mirror” software is used to run the Smart Mirror, and it can be downloaded for free. The software is user-friendly, making it accessible even for those with no coding experience.
The installation process involves copying and pasting commands into the terminal on the Raspberry Pi, as demonstrated in the video. The steps are straightforward to follow.
Once the installation is complete, the software will launch, and the Smart Mirror can be customized with additional modules such as YouTube videos, Alexa integration, Spotify, and Google Calendar.
Step 10: Installing the Electronics Into the Frame
Installing the Electronics Into the Frame (Photo: Shutterstock)
With the software installed, the final electronics are fitted into the frame. The 90-degree HDMI adapter is attached to the back of the monitor, and the power cable is connected.
The Raspberry Pi is mounted onto the monitor using one of the screws saved earlier. The Pi is secured with the screw, and heat sinks and a fan are installed to keep it cool.
Step 11: Final Assembly and Cable Routing
The final step involves organizing and securing the cables at the back of the frame. A combination of hot glue and Velcro cable ties is used to keep everything tidy.
If preferred, zip ties, string, or even tape can be used instead of Velcro. The button pad is also hot-glued to the back of the monitor for easy access.
Optional – Air Ventilation
If the Raspberry Pi is running videos, it can become quite warm. Drilling ventilation holes in the back frame is recommended to promote airflow. For text-only displays, this step is not necessary.
Optional – Cable Notch
For those routing cables through the back of the mirror, a small notch can be cut at the bottom to allow the cables to pass through.
Step 12: The Results!
Smart Mirrors provide an enjoyable combination of technology and hands-on craftsmanship. The customization process is fun and rewarding, with endless options for tweaking the mirror to meet specific needs. The end result is both functional and satisfying, offering a unique and personalized addition to any space.
Creating a DIY Smart Mirror is an enjoyable and achievable project, blending technology with personal craftsmanship. With a few essential components and some basic tools, a functional and stylish mirror can be built in no time.
The customization options allow for a personalized experience, making it a versatile addition to any space. Whether for a bathroom, hallway, or workspace, a Smart Mirror offers both practicality and modern flair. The process demonstrates that with patience and creativity, even complex projects can be tackled easily.
