Hi Ian, I am a member or the I2C & LM Sensors development team. We recently heard about your Varyfan project. Since it is closely related to our project, I'd like to discuss with you about some points. How live is your project? Are you still working on it? How does it compare with our own PWM programs? See here: http://www2.lm-sensors.nu/~lm78/cvs/lm_sensors2/prog/pwm/pwmconfig http://www2.lm-sensors.nu/~lm78/cvs/lm_sensors2/prog/pwm/fancontrol We have a "useful links" page and could add a link to your page there if you think that your project is of general interest for our users. Thanks! -- Jean Delvare http://www.ensicaen.ismra.fr/~delvare/