As part of an electrical and electronic engineering course at Singapore Polytechnic, a group of students were challenged to build an aquatic vehicle that could collect samples from one and two meters underwater. After three months of hard work, the Imp Bot was brought to life!

Imp Bot is controlled by a mobile application made using the MIT App Inventor. Communication is achieved via a Bluetooth module hooked up to an Arduino Mega, while an onboard GPS sensor is used to log sampling locations in the app. Power is provided by a LiPo battery, which supplies high current to the two DC motors responsible for moving the 11-pound vessel around.

The sampler is actually a simplified Van Dorn Water Sampler, an ingenious method of water collection based upon elasticity and a quick-release mechanism. The main body of the vessel was initially made using laser-cut acrylic pieces assembled with PVC pipes, but the structure was too weak so they decided to use aluminium L-brackets instead.

Want to learn more? Check out the team’s video below, as well as read the story on one of the student’s blogs here. The code is also available on GitHub.

Amanda Ghassaei has published on her website an interesting project: the Glitchbox.

This instrument can do two different things:
-it can be used as a standalone audio device, with the audio data stored in the arduino’s flash memory
-it can also be used to sequence MIDI through a usb connection to your computer

The glitchbox is an electronic instrument used for live audio sequencing. Each of its nine buttons is linked to an audio file stored in its memory, new audio files may be loaded onto the instrument via USB. A switch on top allows the user to play, record, and loop a sequence of audio. Once recorded, additional audio may be recorded and automatically looped on top of an existing sequence. Old sequences can be cleared from the instrument’s memory and replaced with new sequences live. Two knobs on top of the instrument control volume and tempo, and a second switch mutes and unmutes recorded sequences.

There is also a detailed  instructable with all the information needed.

Via:[Little Bird Electronic]