Every time I replace an old hard disk by a newer or bigger one I think that I'll wipe it later. Now I have a big amount of hard disks to wipe. Since wiping takes ages, I don't want to use my personal computer for that. I would prefer a small device with low energy consumption just for wiping. That's why I am going to build a "Nukestation". Basically it's just a Raspberry Pi with nwipe on it and a udev-rule for automatically wipe attached hard disks. But some extras would be nice...
I installed Raspbian(Debian Jessie) with Kodi on my Raspberry Pi and I use my Pi as a Meda Center. This Media Center plays music, mostly radio stations, all day long. I can easily control this media-center using the Yatse-App on my phone. The Setup is almost perfect, but just almost. Sometimes I prefer to listen to my Spotify-Playlists. At the moment there are no really good music addons for that. So I came to the idea to pair my phone via bluetooth with my Pi and use the audio output of my phone to play the Spotify-playlists.
My plan was to control some power outlets(16 ampere) using any browser(for example with a mobile phone). I wanted to use electronics only and tried to avoid relays.
I created 2 tasks in RTOS: one for reading from uart and one for the display(8x8 LED-Matrix). Both tasks are communicating via queues. The space-invaders-programm gets started by pressing F1. If F2 is pressed, the programm will display all keyboard-input on the led-display.
I created a LED-Cube. It was a lot of fun to make it. I used very cheap LEDs, therefore it's not perfect. But it is good enough to programm some nice effects. I used an arduino to controll the cube. It was interesting to play with bit-shift-registers and it was cool to programm more with bit-operations. The soldering was hell, but it was worthy
PS: yeah, I know..my cam makes lousy videos...
If you are monitoring services, you also might want to get informed about critical states via sms. Almost everyone has an old mobile phone at home. Why not using one of those old mobile-phones? In this article I will describe how to transform your raspberry into a mail2sms-gateway. This gateway will be able to:
- receive emails and forward them via sms
- receive sms and forward them via email
- provide a webinterface for sending sms manually