Converting analog voltages to computer data has been a central part of my life for four years now. Back in the dark ages, I used the Atomic Pro, a $1500 plastic white box. In 2005, my colleague Mark Marshall developed the AVR-HID. I have built upwards of five of them, and they work really well. But a few months back I tried using Arduino, and it quickly stole my heart: eight channels of 10-bit A/D on a PCB the size of a twoonie. More importantly, it comes with a free lightweight application for programming the microcontroller, which I prefer to using the Terminal. I moved the Rulers to the Arduino platform and will use it again for my Breakflute.