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DIY Portable Monitor

Made a Small Portable HDMI Monitor Featuring a 7-inch display and portable setup with inbuilt battery and HDMI connectivity.

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Greetings everyone and welcome back. Here's something useful.

the DIY Portable Monitor, which has a 7-inch LCD screen with HDMI functionality and a built-in power system that enables the user to use the monitor by just plugging in an HDMI cable.
The concept focuses on designing a portable display that is easy to carry around, with HDMI connectivity and an internal battery that enables the user to power it from anywhere.
This portable monitor has a 7-inch LCD screen that is powered by a custom-built power module that gives the screen a steady 5V. The power module is connected to a unique battery pack consisting of four parallel-connected lithium-ion cells, each having a capacity of 2600 mAh. This gives us a total capacity of 3.7V/10400mAh, which is sufficient to operate this display for hours.

3D Design

The main body and the lid are the two primary components of this project's 3D design. The main body houses the display, circuit, and battery. The lid portion is used to cover the rear and has a slot or opening that enables the user to connect an HDMI cable to the display's HDMI port.

In order to create a rectangular box-like shape, we first imported the display's model into the design and then created the main body so that the entire assembly revolves around the display, which is held in place.

To keep the display in place, we also built two display holding components.

On top of the main body, we incorporated a handle-like component that can be used to carry or raise the entire portable display, much like a briefcase.

The circuit, which consists of a PCB with the Type C port and the vertical push button on it, is modeled from the ground up. Two screw bosses are being used to mount the circuit close to the display. M2 screws will be used to fasten the circuit to the bosses.

Additionally, the battery was designed and placed on the rear of the display; hot glue will be used to hold the battery in place inside the portable display.

Following model completion, we exported all of the files as mesh files and 3D printed them on our Ender 3 printer, using transparent PLA for the main body and black PLA for the screen holders.

Circuit-Power Board

The IP5306 Power Management IC, which supplies a steady 5V 2A of power from a 3.7V Li-ion source, was included in the project's schematic. Its high-cut and low-cut features protect against overcharging and overdischarging the cell.

The charging port that we are employing is a Type C through-hole port that positively connects to the IC's charging port. Along with the charging port and GND, we added a 10uF filter capacitor and a 10uF capacitor combination with a 2Ohm resistor.

Additionally, four LEDs—which will serve as battery-full indication LEDs—are added to the IC's LED port.

To turn this device on and off, a push button has been added.

Additionally, we added two extra filter capacitors to the IC and GND outputs.

Following the completion of the schematic, we used the Cad model's layout and measurements to construct the circuit. We also followed the model's instructions for the placement of the Type C Port, the switch, and the two mounting holes.

Seeed Studio Fusion Service

Following the completion of the Gerber data for the PCB, we uploaded the file to Seeed Fusion's website and ordered PCBs in a blue solder mask.

PCBs were received in a week, and their quality was super good considering the rate, which was also pretty low.

Seeed Fusion PCB Service offers one-stop prototyping for PCB manufacture and PCB assembly, and as a result, they produce superior-quality PCBs and fast turnkey PCBAs within 7 working days.

Seeed Studio Fusion PCB Assembly Service takes care of the entire fabrication process, from Seeed Studio Fusion Agile manufacturing and hardware customization to parts sourcing, assembly, and testing services, so you can be sure that they are getting a quality product.

After gauging market interest and verifying a working prototype, Seeed Propagate Service can help you bring the product to market with professional guidance and a strong network of connections.

PORTABLE DISPLAY v20.f3d

fusion - 4.36 MB - 11/24/2024 at 05:42

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SCH.pdf

Adobe Portable Document Format - 176.12 kB - 11/24/2024 at 05:42

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PORTABLE DISPLAY v20.step

step - 628.25 kB - 11/24/2024 at 05:42

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body.stl

Standard Tesselated Geometry - 248.71 kB - 11/24/2024 at 05:42

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LID.stl

Standard Tesselated Geometry - 73.71 kB - 11/24/2024 at 05:41

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View all 7 files

  • 1
    Circuit Assembly Process
    • Utilizing a solder paste dispensing syringe, we apply solder paste to each component pad to begin the Main Circuit Assembly process. Here, we are utilizing Sn/Pb 63/37 solder paste, which has a melting temperature of 190 °C.
    • Next, we pick each SMD component and place them in their correct locations.
    • All of the components are then permanently bound to their pads when the entire circuit is set on the reflow hotplate, which heats the PCB to the solder paste melting temperature.
    • Next, we positioned every THT component—including the Type C port, the vertical push button, and the CON2 JST connector—in its proper location.
    • The soldering iron is then used to solder the pads of each THT component from the board's bottom side.
  • 2
    Power Source and Testing

    As the power source, we use a specially designed battery pack that has four 18650 3.7V lithium ion cells, each of which has a capacity of 2600 mAh. Since the display only requires 5V/1A, the 10400 mAh (38.48 Wh) total capacity that results from connecting all of the cells in parallel is enough to power it for more than seven hours.

    The battery's CON2 JST wire harness was linked to the CON2 JST connector that was added to the circuit.

    Upon pressing the Vertical Push button, the circuit is triggered, and the 5V output value of the power module signifies that the circuit is functioning.

    Pressing the vertical push button twice will turn off the circuit.

    We can also use this setup to connect a smartphone charger via the type C connector in order to charge the lithium-ion battery pack.

  • 3
    Display

    We are utilizing a typical 7-inch HD LCD panel with an HDMI input connection and an extra USB port that can be used to give it touch functionality. Since the display's touch is not very good, we will be ignoring this completely and concentrating just on the HDMI port.

    The display has a resolution of 1024x600 pixels, is suitable for use with Raspberry Pi, NVIDIA, and Windows devices, and it weighs approximately 265 grams.

    Additionally, it offers support for the Raspberry Pi as it contains four M3 PCB stanoffs onto which we can connect any Raspberry Pi exceot for the Zero Series.

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