Digitized Mechanical Typewriter

Read Gameboy Camera from AVR

Broadcasts pictures over serial.

Weird Clay Music Thing

It had an Arduino inside and 3 speakers. Played algorithmically generated music out of the tentacles.

Demomite

Attiny13-based demo platform.

Desktop CNC Machine

Never worked.

USB TV Remote Receiver

Rigged up in software to control WinAmp.

Altoids Tin POV Display

A Small Keyboard

Atmega328P brain. Sends key presses over 9600 baud serial.

Hacky Watch

Made in 4 hours out of parts on hand.

http://forums.tigsource.com/index.php?topic=34294.0

Many, Many Calculator Programs

http://owen-t.me/software/2014/06/02/calculator_childhood.html

LED Panda

Picture is of the display that the panda was on. The video below is of the actual panda:

https://www.youtube.com/watch?v=Kejw1KzkGdc

A Blog Engine

Based on Jekyll, but with incremental updates over FTP.

Tiny Node.js hardware widget.

http://owen-t.me/old/2012/07/08/introducing_nibble_working_title.html

Microfluidic Display

http://owen-t.me/hardware/2014/04/04/microfluidic-screen.html

Modular Drawbot

PC controls multiple battery-powered stepper motor modules over bluetooth to draw on a whiteboard. Made with 2 friends for hackMIT.

http://2doodle.us/

Calculator with GPIO

Dead-bug soldered AVR and simple support circuit in a TI-83+ calculator. Over a DB9 connector added to the back of the calculator there is serial RX and TX, analog output (PWM through filter), and 4 digital IO or analog inputs. RGB LED too.

Drawing on TI-84+ Calculator from Arduino

Wrote code that implemented the TI link protocol for Arduino, and then sent keypresses to a calculator from a Ruby script over an Arduino to draw arbitrary pictures with the calculator's drawing tools.