【Laser target detector】Belated unboxing, RPI400 unit only

tjCFeng

【Laser target detector】Belated unboxing, RPI400 unit only [Copy link]

 

Thanks to EEWorld and Digi-Key Electronics for giving me this opportunity. I joined late and just received the materials, but the things are still very good.

I won’t take photos of the express packaging, they are all the same, I only look at what’s inside

Fedex shipped it directly from the United States, and then sent it to China via SF Express. It was just a keyboard, without a power supply, HDMI cable, or mouse. I was thinking how nice it would be if the Americans made a mistake and sent me a set. Fortunately, I did some research before I got the board, and I had everything I needed, such as a large-to-small HDMI adapter, the display and power supply used on the device, etc. Since the project itself does not require a mouse, the mouse does not matter, it is only used during development.

I took it out and had a look at it. I felt a little disappointed. Having Japanese characters on the box was not a good sign. After all, the most commonly used keyboard layout is the American one, and people from other countries might not be used to it.

It is indeed a Japanese version. I forgot this when placing the order. Fortunately, it does not affect the use.

The interfaces are the same, RPI400 and 4B are the same, just different in shape. The CPU frequency rises to 1.8G only because of the large heat sink in the keyboard. If you overclock it yourself, it will definitely start at 2G, and the same is true for 4B.

Look at my small screen and adapter. They look pretty similar, right? Unfortunately, I didn't expect the resolution of this small screen is too low. It can't be supported by plugging it directly. The default resolution of RPI is too high. I don't have the monitor I usually use for work with me, so I can only use the TV.

I burned the TF card used for the system in advance. Wow, the default resolution was 2K. I had to run to the front of the TV to see the font clearly. I had to lower the resolution first.

After entering the system, the huge desktop squeezes out the toolbar. It's okay for watching movies, but forget it if you want to read text. You'd better hold the mouse in front of the TV to operate it.

System upgrades, country selection, etc., the list is almost going downstairs.

The initialization settings are completed and the CPU usage after standby is still very low.

I won't introduce RPI, everyone is familiar with it. There is not much difference between 400 and 4B in configuration, just an extra keyboard. My plan is to use this keyboard to input some settings on the target reporting device. Of course, only Raspberry Pi is not enough, and 2.4G communication and battery must be added to the combination. I hurriedly checked with a coulomb meter, and the standby current of Raspberry Pi is about 700mA, and it is more than 1A when working. The power consumption is still quite high. Add a 10-inch screen, and the battery will not work if it is small. I will start to prepare things for development later, and continue to post after completing a stage.

秦天qintian0303

It will be finished next month, hurry up

soso

I also learned Japanese while developing it :)

tjCFeng

soso posted on 2022-9-26 17:18 I learned Japanese while developing:)

Just understanding a few words is enough.

Honghuzaitian

Does this small computer feel comfortable compared to a tablet? Is there a big difference?

tjCFeng

Honghuzaitian posted on 2022-10-4 21:11 Does this small computer feel comfortable compared to a tablet? Is there a big difference?

Unlike tablets, which use the Android system, this one uses Linux, and can install various development environments. You can develop locally and compile and run directly.

Honghuzaitian

tjCFeng posted on 2022-10-6 20:46 Unlike tablets, which use Android systems, this one uses Linux, and can install various development environments, and can be developed locally and compiled and run directly.

If Android can change the executed program at will, then there is no difference, just the environment is different? Other things should be similar?

tjCFeng

Honghuzaitian posted on 2022-10-7 00:46 If Android can change the executed program at will, then there is no difference, just the environment is different? Other things should be different...

Yes, it is similar. Raspberry Pi also has Android operating system, and Android can also be compiled natively, so you can run it directly after writing.

Honghuzaitian

tjCFeng posted on 2022-10-7 10:17 Yes, it is similar. Raspberry Pi also has an Android operating system, and Android can also be compiled natively. You can run it directly after writing it.

It is hard to understand why the Raspberry Pi is so expensive. The supply abroad is not tight, but the price in China has risen ridiculously.