I am working on a project in which I need to output an Analog signal between 0-5V. I was able to develop a 3rd order low-pass filter to achieve this using a PWM output from the microcontroller, but it will not work with the 490hz PWM output frequency that the Diecimila board provides (the low-pass filter requires 10kHz or 20kHz). I have two questions:
Is there a way to change the 490hz frequency using programming or additional hardware so that it could match the 10kHz or 20kHz I require, or
Does anyone know how to make an analog output from 0-5V from the diecimila board using additional hardware?
I appreciate any help anyone could provide.