Engineering
SimulIDE – Circuit Simulator
simulide.comSimulIDE is a simple real time electronic circuit simulator, intended for hobbyist or students to learn and experiment with analog and digital electronic circuits and microcontrollers.
It supports PIC, AVR , Arduino and other MCUs and MPUs.
Preface — Digital Signals Theory
brianmcfee.netThis book is designed to follow the course syllabus of Fundamentals of Digital Signals Theory (I) (MPATE-GE 2599) at New York University. The focus here is on digital signals, meaning discrete time signals as represented in modern computers. The scope of the book is limited to these general topics:
Signals and systems,
Sampling theory,
Discrete Fourier analysis, and
Discrete-time linear filtering.