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Is the input signal on your TV or AV receiver insufficient? Do you want to connect two TVs to one source? Cheap HDMI switches and splitters can be saved.
A simple HDMI switch (from an IO device) can add much-needed inputs to a TV or AV receiver.
Tired of swapping
cable? Did you just buy a new one
Console, there is no place to insert? Want to run the same signal to multiple
? My friend, you need an HDMI switch or an HDMI splitter. They are an inexpensive way to keep your current equipment relevant and useful. But which is which?
Techole launched a $10 2x1 switch. Yes, that is the actual company name.
The words "switch" and "splitter" are often used interchangeably, but the device itself has the opposite effect. We will go into details, but the short version is that the HDMI switch has multiple sources, such as
, And allows you to choose (switch) between them to send a cable to the TV. As you may already know, a splitter receives a signal and separates it through multiple HDMI cables.
For most people reading this book, you may need a switch. Although a dispenser is required in many cases, it is not common for ordinary consumers.
The main reason to use HDMI switching is your TV, AV receiver or
The number of resources entered is too small.
For example, your TV has two HDMI inputs, and you have a cable box, a Roku and an Xbox. I'm pretty sure that many of you have Xbox and PlayStation, and have to swap HDMI cables to play games on the other. The switch can also help you. Fortunately, they are not that expensive.
When you buy a switch, please keep some precautions in mind. Get more input than you need. Of course, you may change the streaming media or game console to a new model, but it is also possible that you will get something new and require an additional HDMI input. In addition, some switches have remote controls. In any case, it is not a major event, but it must be convenient.
The switch requires multiple sources (in this case, two game consoles and a laptop), and then sends them to the monitor.
It is important to ensure that any switch you are considering matches at least the resolution and HDMI version of the latest device. Many switches are HDMI 1.4, suitable for 1080p, but not for most 4K. HDMI 2.0 switcher is definitely worth spending more money. Even if your current resource is not 4K, your next resource will definitely be 4K. HDMI 2.0 is backward compatible, but you cannot "upgrade" the HDMI 1.4 switch to 2.0.
4x1 switch. Four inputs, one output to the TV.
If you need a switch urgently, consider the following: HDMI ports on TVs and other devices are not built for repeated connection and disconnection. Whenever you want to switch the signal source, you have to pull out the HDMI cable, which will cause wear and tear on the cable and equipment. The switch will reduce wear, extend the life of the gear, and reduce the trouble of using the audio-visual system.
We currently have no recommendations for specific HDMI switches, but you can find many options on Amazon for only $10 or less.
Please note that if you purchase any features on our website, CNET may share the proceeds.
If you have only one signal source and want to send the signal from that source to multiple TVs, you need an HDMI splitter. Maybe the TV is in a different room, or in the same room, you have a TV during the day and a projector at night. The splitter will copy the signal and send it out via multiple HDMI cables. Some separators are also switches, with multiple "inputs" and multiple "outputs." We will discuss these in the next section.
1x8 splitter: one signal source can be connected to eight TVs or projectors.
If you want to display two monitors at the same time, remember that the maximum resolution of all monitors is
The resolution display is. Therefore, if you have 4K source, 4K TV and 1080p TV, 4K source can only send 1080p. The splitter does not just convert the TV to a 1080p signal.
In theory, you shouldn't have copyright protection issues...in theory. You should be able to send whatever content you want to multiple TVs through the distributor. However, this does not guarantee that you will not encounter any problems.
"It's black magic, sometimes it can only be solved by dancing with the HDMI logo painted on the floor with unicorn tears. This is especially true for older monitors and signal sources. Before buying, please make sure it passes HDCP. In the product description in.
Although there are some unpowered splitters on the market, it is better to have a power splitter. They are only slightly more money, and your settings are more likely to work without dropped connections or connection problems.
As with switches, we currently have no recommendations for specific HDMI splitters, but you can find many options on Amazon for only $10 or less.
I mentioned here that some products on Amazon (and elsewhere) are mislabeled. For example, in the splitter link above, some switches are shown, one of which (
) Is a switch, not a splitter, even if the word "HDMI splitter" appears in its description. But now that you have read so far, you will know the difference and can shop with confidence, right?
The names of the separators and many switches will carry the number of inputs and outputs. Therefore, the "1x3" splitter will send one input to three outputs.
At the same time, unlike the above-mentioned mislabeled devices, some devices combine a switch and a separator in the same box. The "4x2" switch is also a distributor, with four inputs and two outputs. It can send any one of the four signal sources to two TVs.
On the commercial side, the number of inputs and outputs has greatly increased, and you can use 16x16 splitters/switches or more. These are usually called matrix switches. CNET's TV laboratory uses 8x8 matrix switches to send multiple 4K HDR signals to multiple TVs for side-by-side comparison tests.
Installing anything in the TV test lab has never been so exciting for me.
Of course, you don't need to worry about these. For most people, only 3x1 or 4x1 switches are needed.
One last thing to remember. Adding any device to the HDMI chain may cause problems. HDMI is a monster, you may stumble upon some combination of unusable signal sources, switches/splitters, cables and displays. What's even more frustrating is that it doesn't work reliably, cutting it off randomly like the most annoying electronic demon in the world. There is no way to prevent this from happening, and it's not common, it's just something to remember. You may need to do some troubleshooting. You may be able to solve this problem by opening the gears in a specific order, but this may not work either. There is no simple solution, just trial and error.
However, in most cases, the switch will make your life easier, and the shunt can be set in certain gears, which is not possible in other cases. Convenient little device, isn't it?
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HDMI 2.0 video matrix provides 4x4 VX44-18G kit, 8x8 VX88-18G and matching VRX70-18G receiver, and is integrated with RTI control system.
Each model supports 4K UHD resolution with 60Hz refresh rate and 4:4:4 chroma sampling, complies with HDCP 2.2 specification, and supports HDMI audio formats, including Dolby TrueHD, Dolby Atmos, Dolby Digital Plus and DTS-HD main audio .
The VX44-18G-Kit and VX88-18G matrices have four and eight HDMI inputs, respectively, and each model can be independently routed to four and eight HDBaseT outputs. Both models also provide synchronized HDBaseT/HDMI output.
Both models can be paired with the VXR70-18G receiver.
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Express yourself by scrolling text on the mask with Flex NeoPixel matrix and Raspberry Pi.
When wearing a mask, is it difficult for people to understand what you are talking about? Now you can make a fashion statement and express yourself in words while still wearing a mask. This tutorial brings a new meaning to the way of expression, "It's written on your face."
It is recommended to wear masks in public places where you may encounter other people to help slow the spread of COVID-19. The mask should completely cover the person's nose and mouth.
For most of us, facial coverings also hinder our ability to communicate verbally. I have seen many people put down their masks when talking, but unfortunately, this weakens their ability to use masks. How can we express ourselves clearly while keeping our nose and mouth covered?
In this article, we will show you how to use
And 8x8 NeoPixel flexible matrix. For this project, we will also provide 2 versions for 16-pixel and 32-pixel wide matrices. The cloth mask should have a translucent top layer and completely cover your mouth and nose. Before cleaning your mask, remove all electronic equipment.
Put on a mask, cover your nose and mouth, turn on the power, navigate to the front end of the local web page, and enter text to scroll through your mask.
In this step, we will perform basic wiring and run the sample code provided by
. The NeoPixel matrix requires a separate 5 volt power supply. In order to make the project portable, I am using a 5V power bank charger.
. (M to M line)
To the ground wire on the breadboard. NeoPixel Matrix actually needs to connect 2 GND wires, one is next to the 5V red wire, and the other GND wire is next to the DIN. Please connect both to GND.
On a breadboard.
(There are stripes next to it)
(The side without stripes).
matrix. (M to F line)
In order to use the 5V mobile power charger to power the NeoPixel matrix, I used an old microUSB cable and cut off one end of the microUSB (retaining the USB), stripped the wire, and exposed the red (power) and black (ground) wires .
If you are not ready to cut off the USB cable, please use the following power sources to power the NeoPixel:
For the wiring in this step, I used a test wire with an alligator clip to connect the stripped USB cable to the power input on the NeoPixel matrix. I finally plugged the USB into the mobile power charger.
After completing the wiring connections, let's test the matrix using Adafruit's test code.
If you don’t have a microSD card, please refer to the following article:
Or how to do
You can do this by pressing CTRL+T.
If your NeoPixel matrix lights up, it means red, green, blue, rainbow, congratulations, your NeoPixel matrix is working, you can proceed to the next step. Otherwise, please go back and troubleshoot the connection.
Does not work properly on your Raspberry Pi, you can change
. turn on
(Click the right mouse button in the file manager), and then update the GPIO output. Don't press Geany or Thonny's Run button. Remember, if you choose to change the GPIO output
, You will need to make the same changes to other files as you complete this tutorial.
Stop the script.
At the end of this step, you should have a basic NeoPixel matrix that can be fully lit.
In this section, we will test the scrolling text function of the NeoPixel matrix.
1. If you have
And still in
You should scroll on the matrix to see the text "Welcome to Tom's Hardware".
Stop the python code.
From the same terminal and the same directory.
4. The code should automatically prompt you to enter your own text.
Or a phrase of your choice.
You may notice that the letters (fonts) on the matrix are slightly different from those seen in the example video of this tutorial. The sample code uses the default font included in Raspberry Pi OS, while the video uses
Font. You can
Then install it into your Raspberry Pi.
2. Open a new terminal, then
Before "Font = ImageFont.truetype("LiberationMono-Regular.ttf", 8)"
Set the font to
Enter the word or phrase of your choice.
In this step, we will make our solution mobile by creating a convenient front end
Enter the scrolling matrix text on the website.
1. If you have completed the optional steps to change the font (in the previous step), please make the same changes in the file
2. On the terminal, navigate to
Directory, and then run
Use the command (sudo python3 app.py).
(Assuming "raspberrypi" is your hostname) or
You can choose to scroll on the matrix.
If you see two scrolling entries on the matrix, please go to another computer or phone (on the same WiFi network) and enter
Once again, let's assume raspberrypi is your hostname.
. If you see the text scrolling twice on the matrix again, you can set the script to start on startup.
In this step, we will set up Pi to always run
The code that runs at startup.
In this step, we make the solution truly mobile. In the case of turning off the Pi and completely exiting the previous step, we will first write down the wiring and take a picture if necessary.
Correctly connect between the power input of the matrix and the USB cable.
. Use a hair dryer or heat gun to seal the heat shrink tube.
. You may need to add a small piece of wire between the ground wires to make the + wire flat. Cover the exposed wires with heat shrink tubing. Use a hair dryer or heat gun to seal the heat shrink tube.
After soldering, your NeoPixel matrix power input should have a USB connection.
There are 2 female to male wires. Connect DIN to GPIO 21 (or if you changed the GPIO pin in the previous step). Connect GND to any GND pin on the Raspberry Pi.
The front is a translucent fabric, so be careful not to disconnect any wires.
. If you have 2 USB outputs, you can use a mobile power charger to power Pi and NeoPixel. Raspberry Pi 4 can be powered by a mobile power charger with USB Type-C output.
8. After the pi starts, go to any computer or mobile device on the same WiFi network, and then
And enter a word or phrase.
If the text you entered scrolls on your mask, congratulations! You have completed this project!
For a real
, If you have a mobile plan and a smart phone with hotspot function, you can get rid of the shackles of home WiFi.
1. On your smartphone,
2. On your Raspberry Pi desktop
And enter the hotspot password of the phone.
3. In the browser on the smartphone,
And visit your front-end web page.
I provided 2 other versions of Python files for this project for 16-pixel and 32-pixel wide configurations.
To make a 16x8 NeoPixel matrix for the Raspberry Pi scrolling text mask, you will need 2 flexible 8x8 NeoPixel matrices. The second NeoPixel matrix will be powered by the first matrix and does not require a second power source.
Your primary NeoPixel to
The second NeoPixel matrix.
Place the matrices side by side and secure them in place with electrical tape.
With a translucent top layer. Keep in mind that you will need a cloth mask that ends 3.1 inches high to fit NeoPixels.
From your terminal:
6. If any changes are made to the code of the 8x8 matrix (font, text color, scroll speed), then
To the files in the 16Matrix folder.
Just like you did for the 8x8 matrix.
It can be purchased immediately and can be connected in the same configuration as the 8x8 matrix. The 32x8 NeoPixel Matrix is too wide to fit in the mask, but it can fit well above the mask.
Follow the steps in Part 1.
From your terminal:
3. If any changes are made to the code of the 8x8 matrix (font, text color, scroll speed), you need
To the files in the 32Matrix folder.
Just like you did for the 8x8 matrix.
Then glue the hot glue to your mask.
In addition, if you want to display a static image of the crown, you can use the file 32-crown.py. Run the code:
We hope you found this tutorial interesting and useful. This project brings new meaning to "it is written on your face".
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