- timer1 library. This library is a collection of routines for configuring the 16 bit hardware timer called Timer1 on the ATmega168/328. There are 3 hardware timers available on the chip, and they can be configured in a variety of ways to achieve different functionality.
- SO query with a couple of answers.
Clickwheels and Diskdrive Spinners
- some forum post.
- Instructable: HDDJ: Turning an old hard disk drive into a rotary input device (video)
- code: Interfacing › HDDJ:hard drive as scrollwheel/turtable-like input