What can the Raspberry Pi do?

/image/same/blog/2019/04/25/e9cc13ed6f1c414696aadf2e6b915e73.jpg

In the era of makers, the rise of open source hardware allows everyone to try to design some projects themselves, although the difficulty is still a bit high. If you are geek enough and have enough fever, you should buy a few Raspberry Pis. Or Arduino to play. Maybe you still don't know much about the Raspberry Pi and what the Raspberry Pi can do. Let's take it easy and discover the fun of it step by step.


What is open source hardware?

Open source hardware refers to computers and electronic hardware designed in the same way as free and open source software. Open source hardware is beginning to consider open source outside of software and is part of the open source culture.

The term is primarily used to reflect the hardware design of free-release details, such as schematics, bill of materials, and board layout data, often using open source software to drive the hardware.

The Raspberry Pi is one of the open source hardware with an ARM architecture processor and 256MB of RAM (Type B has been upgraded to 512MB of RAM). The Raspberry Pi is only a credit card sized and is about the size of a matchbox. It can perform games like the Quake III Arena and play 1080p movies. The original purpose of the Raspberry Pi was to stimulate basic computer science education in schools with low-cost hardware and free software. It was originally designed to give children a computer to learn, not to give you Geek to toss and play.

Creative applications like WaterColorBot are still relatively rare, but in the spirit of “Tian Xingjian, geeks tossing away”, we can still do a lot of interesting things with the Raspberry Pi. Many geeks have achieved a lot of fun features. After you read it, do you want to try it? Let's see what interesting things they have done with the Raspberry Pi.


Raspberry Pi turned into a microblogging robot

The biggest thing about the Raspberry Pi is that it is very scalable, and users can add various sensors to it. For example, the temperature sensor is used to monitor the temperature, and the simple detection temperature is relatively boring. Let's make a transformation, the temperature monitoring results will be sent to Weibo regularly, the Raspberry Pi will become a microblogging robot, and the current temperature will be sent to Weibo every time. Maybe you may not write the code, don't know how to configure the interface of Weibo. It doesn't matter, some people have already done some work, as long as they can start, you can Google, you can also achieve.

/image/same/blog/2019/04/25/703e3e6c497c45e98997dafd743aac10.jpg
 

In addition to the temperature sensor, you can try other sensors to implement new gameplay, waiting for your attempt.


Raspberry pie to make real watercress FM

Make the Douban FM really an FM radio station and listen to it on the radio. Although it seems to be more than one thing, the spirit of geeks is to be tossed, and it feels cool when it is made. When I heard this concept, I didn't have a start at first. In fact, the idea is still relatively simple. The Raspberry Pi can be networked and can be loaded with operating system extension functions, which is more convenient for us to toss. Simply use the Raspberry Pi to download the MP3 music stream from the Douban FM and decode it, and modulate the audio signal into a FM signal. You can use the radio or the mobile phone Douban FM. The specific code implementation makes good use of Github, and can also find it.

/image/same/blog/2019/04/25/ff78f009c3b54099bd34059dd27a46a3.jpg
 

If you have a fever and geeks, you can try this method and add your Raspberry Pisto FM to a monitor.

Only need to add a display module, infrared remote control, infrared sensor, of course, the difficulty of the hands-on is also improved a lot, requires a certain programming basis.


Raspberry Pi implements remote door opener

When you check in at the company, send an order with your mobile phone and the door will open automatically. Maybe it sounds like sci-fi before, it’s very geek, and it’s very difficult to make. It is not difficult to implement the Raspberry Pi now. You need to study the lock, send the operating system to the Raspberry Pi, configure the network, connect the hardware, and write a small Web Server with code. Then enter the correct password to unlock it. If you have a higher end, you can write an Android and iOS program, sign in with your mobile phone, so that every time you forget to bring your door card, use your mobile phone to open the door remotely.

/image/same/blog/2019/04/25/af96baec7e3141cfae115e150d9b2382.jpg
 

Kindle + Raspberry Pi = PC

How can the PC be assembled? As long as you have a Kindle and Raspberry Pi, you can transform it into a small PC. This difficulty is much higher, but the more challenges, the greater the fun. A jailbroken Kindle plus an external keyboard, the Raspberry Pi as a processing center, and the Kindle as a display, does not look like a small PC, although it can only implement the ancient command line mode, Hack on the Kindle, at least Improve a lot of pressure.


  /image/same/blog/2019/04/25/4b23e1f3b45f4f7dad5b6e5af0a1087f.jpg


Homemade Raspberry Pi aircraft

The Raspberry Pi computer-controlled rotorcraft can be equipped with a miniature camera for smartphones. Compared with the aerial combination of a common rotorcraft + camera, it is not only cheaper, but also enables more complex functions, such as aerial video recording or real-time aerial photography. Image wireless transmission, compared to the purely bought mobile phone controlled by the mobile phone, this self-modified raspberry version can also expand the function, is not cool.


Not long ago, when I went to the magical intelligence, I found that their studio door was covered with sensors. Later I learned that this is used to unlock the door and set the unlock pattern on the door. Just tap the fixed position in a specific order to unlock it. The specific principle is that when hitting the door, each hit point sensor can sense it, and then each sensor calculates the offset to get the coordinates. If you match the set plan, you can unlock it.

They created an unlocking solution in a very geek way. For ordinary users, there may not be that ability to do it. The appearance of the Raspberry Pi has reduced the difficulty to some extent, and you can try to make some small products yourself.