Raspberry Pi - what can be done on the basis of “raspberry”? Part 2

In the first part of the collection, it was told that on the basis of the Raspberry Pi mini-PC, you can make a supercomputer, a weather balloon and even a festive lighting system.

The new selection shows no less interesting projects: a quadrocopter, a photo frame, a webcam for broadcasting images from anywhere and some other things. Most of the projects were created not just for the sake of pleasure, but are designed to fulfill a completely practical task.

Quadcopter

This project is a completely ordinary quadrocopter, where the Raspberry Pi is used as a data center. A mini-PC, with the appropriate software, distributes the load for the motors, calculates the direction of movement of the device, and all this in real time.

According to the creator of the device, such a system can be used, for example, to map the terrain, conduct aerial photography and perform a number of other tasks.



An ordinary quadrocopter is an aircraft with a simple control system. Here we see in the literal sense of the word a flying computer that is capable of much. The software needed to run the system can be found on Github .

Toiletcam

Here the name already speaks for itself. The project was made to make life easier for office workers: thanks to the application installed on a smartphone or PC, the office worker can see if the toilet is empty. Moreover, the separation is for male and female toilets (in the case of separate toilets, of course).



The software operation algorithm is quite simple:

1. Streamer Linux application takes pictures and saves them;
2. Through PHP-GD, pixel brightness is determined. Then the average value is calculated;
3. The result is compared with the local cache, and if the difference is significant, there is a record in the database;
4. The user receives a busy message in the form of a red icon.

All in all, pretty practical.

Bird feeder webcam

Colds have come, which means it's time to help the birds feed themselves. And to monitor the feeder, you can install a webcam with a motion detector, and open the video stream for everyone.

The raspberry helps with this again. It looks something like this (video can be viewed directly in the browser).

What the system looks like in the assembly:


What is needed?

Software:

• Arch linux
• Motion
• Ffmpeg

For Windows: putty + Winscp

Iron:

• Tplink WN722N USB;
• Camera Sweex Blackberry Black Usb Hd;
• USB hub;
• Converter Maplin A79 GW DC to DC;
• 12-volt battery;
• Feeder.

Checking WiFi network status

This project is not the most practical, but in the office it is quite possible to implement. The goal is to demonstrate the presence or absence of wireless connectivity. The green light is on - it means everything is OK, and if you do not have a network, problems are on your side.

The red light is on - everything is clear, there is no network at all, so the administrator is going to solve this problem.

Home media center

Similar projects were published on Habré, and much more serious ones . But here everything is simple, you can create your own media center in a few minutes. The main thing is to install the appropriate software and connect the cables.



By the way, most of the mentioned projects are based on the first Raspberry models. The Raspberry Pi B + came out this summer , with more advanced features. Maybe someone has already done something based on the updated model?