BeagleBone is accessed by using Websocket connection to small server. Then server interprets data and sends PWM to drive servo motor. If you would like to dig deeper there is a GitHub page where you can find latest source codes and library for driving PWM.
You can get pretty powerful tablet for less than $50 but DIY Raspberry Pi tablet beats them off. Michael Castor build one that looks awesome. He routed wooden case with CNC machine where he put the parts he collected through the year. He used 10.1” LCD display with touch screen. Touch interface is connected to USB port.
Raspberry Pi tablet is powered with 10Ah battery which gives approximately 6hours of use. There are few things that might be improved or included. One of them camera – its pretty hard to include camera module in front, but why not in back. Other things are related to touch that doesn’t want to work correctly from RaspBMC. Since there is programmable I/O, why not including several more sensors? The name “PiPAd” also sounds great.
Photo frames may be a great way of displaying images. Instead of static photos, they can cycle through bunch of them that keeps your attention for again and again. If it updates photos automatically from sources like Flickr then its better. Samuel got a Raspberry Pi from his girlfriend and so wanted to make something for her. So he decided that active photo frame should be nice. So he build pretty fun device which keeps updating photos from Instagram and Flickr. Another great feature is motion detection, which turns LCD once somebody closes in.
Photo frame parts include USB based WiFi adapter which allows connecting RasPi to the Internet. A simple passive PIR sensor serves as motion detector. It is attached to Raspberry Pi GPIO. Photos are updated by using Python and APIs that sends requests for new images. Final touches like original frame completes it.
Decent surveillance camera setup is quite costly and probably not worth for personal use. Anyway there is always alternative. With cheap Raspberry Pi and camera module you can build customizable surveillance camera that will record HD video. Since Raspberry Pi is a Linux machine, you can do lots of crazy stuff with it. Scavix have written a guide how to set up a camera that would stream live video to web and would be triggered to record on motion detection.
The setup is pretty straight forward. It uses all accessible parts like Raspberri Pi with camera module, small USB based WiFi adapter, SD flash card and micro SUB power adapter. And proper case especially if camera is used outdoors. He used open source software for detecting motion (which is also called motion). It simply detects if video image has significantly changed and sends trigger event – start recording in this case. Recorded files are stored in Windows shared folder as SD memory is pretty limited and fills up quickly. With proper configuration it is also possible to access live stream from any browser. There is more ways to improve the camera for instance sending notifications when motion is detected, add additional external sensors like temperature. And to be on safe side there could be battery pack included in case someone would cut the power.