When his handstand coach asked if anyone could build a piano that could be played with his feet while upside down, alpage stepped up to the task. Using a Teensy 3.5 and wave table synthesis in the Audio Library, the piano came together. The piano plays chords and has 4 different voices.
You can watch the keyboard being played with feet while in a handstand in this Facebook video.
Frank Piesik built the ElektroCaster, an awesome open, modular guitar-synth.
The incredibly versatile ElektroSynth is playable as both an electric guitar and and synth, and also has a pretty impressive list of features such as:
Parametric OpenScad modelling (changable string count, scale, space between strings,…)
Fully controllable RGB-Led-iluminated Fretboard (Only the first 17 frets for now, but easily exendable)
Long scale (700mm) for low tunings
Two micros, one for audio an one for everything else.
Per string signal path
This project came about because Frank had always wanted an illuminated fret-board to display information such as scales and sequences. Armed with a 3D printer, CNC router and other maker tools, he set out to build a guitar from scratch.
Brett Garberman is part of a team that developed Pitch Plus, a wearable device for Little League baseball pitchers
Repetitive pitching is a leading cause of non-contact injuries in Little League. Monitoring the number of pitches per player for a game, season, or month can be a challenging task. The Medical Device club at the University of Pennsylvania’s Penn Health-Tech initiative developed Pitch Plus to help with monitor the pitching activity of Little League players.
The PitchPlus uses a Teensy 3.2 as its processor and also has an ADXL377 accelerometer. The device collects data on the pitching activity of the player and stores it on an SD card. Not only does it record pitch count, but the level of force in the pitch as well. The data can then be imported into MATLAB for analysis. It also includes a Bluetooth module that allows the data to be live-streamed for live visualization. This allows for coaches to better monitor players and limit play time when needed to prevent injury.
An alarm clock with everything! Has a high accuracy temperature compensated clock (DS3231), automatic sync to GPS time, large touchscreen user interface, handling of time zones and daylight savings time.
Code and schematics for the project are available on the ElektorLabs project page, but it looks like you will have to create an Elektor account to access them.