< class="entry-title">Digital RPM meter and PWM driver> Last updated: Tuesday, August 7, 2012 I used 2 microcontrollers PIC16F84A in this project. One for measurements and LCD display and one for generating the PWM signal. Here is the documentation:Â Â Digital RPM meter and driver Homemade Microcontroller Based RPM Meter – The funniest videos are a click away Leave a Reply Cancel reply Your email address will not be published. Required fields are marked * Name * Email * Website Comment You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong> Notify me of follow-up comments by email. Notify me of new posts by email.