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

In the first part of the compilation it was told that, based on the Raspberry Pi mini-PC, you can make a supercomputer, a meteorological probe and even a festive lighting system.

The new collection shows no less interesting projects: a quadcopter, a photo frame, a webcam for broadcasting images from any location and some other things. Most of the projects created not just for fun, but designed to perform one or another quite practical task.
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Quadcopter

This project is a quite ordinary quadrocopter, where Raspberry Pi is used as a computing center. 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, for mapping terrain, conducting aerial photography and performing a number of other tasks.



A conventional quadcopter 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 required 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, an office worker can see if the toilet is free. Moreover, the separation is for male and female toilets (in the case of separate toilets, of course).



The algorithm of the software is quite simple:

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

In general, quite practical.

Webcam for bird feeders

The cold came, which means it's time to help the birds feed themselves. And to monitor the feeder, you can install a webcam with motion detection, and open the video stream for everyone.

“Malinka” helps again. It looks something like this (video can be viewed directly in the browser).

How does the system in the assembly:


What do you need?

Software:

• Arch linux
• Motion
• Ffmpeg

For Windows: putty + Winscp

Iron:

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

Checking WiFi network status

This project is not the most practical, but in the office it is possible to implement. The goal is to demonstrate the presence or absence of wireless communication. A 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

On Habré already published similar projects, and much more serious . But everything is simple, you can make 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 were made on the basis of the first Raspberry models. This summer came out Raspberry Pi B + , with more advanced features. Maybe someone has already done something based on the updated model?