The book clearly demonstrates how digital filters can be constructed not only according to recipes but also creatively. Since this construction is only possible with a solid understanding of theory, the necessary theoretical concepts are presented transparently and understandably through graphical methods and many carefully selected and calculated examples. Additionally, practical methods and tricks are provided that one must use when implementing digital filters with microcontrollers to achieve functional programs. The content is self-contained, and no further knowledge about analog filters or additional tools is required.