MIDget is a simple, inexpensive sensor interface based on the AVR ATTiny26. In its current incarnation, 8 of the 11 available ADC channels are used. This means that you can connect up to eight sensors, knobs, or whatever to the board. The MIDget sends the 10-bit ADC value as 2 separate MIDI CC messages (1 for LSB, and 1 for MSB). This allows you to bypass the 7-bit resolution limitation inherent to MIDI CC messages for projects that require greater sensitivity. These 2-byte messages can be put back together inside of MaxMSP.
Download Source Code(gcc).