Free Downloads

Free software, simulators, lecture notes and e-books for semiconductor and electronics engineers, with guides from The Digital Electronics Blog.

Free simulators and EDA software

Free HDL simulatorsVerilog, SystemVerilog and VHDL simulators you can use free ModelSim PE Student EditionFree HDL simulator (2026 update) Free VLSI CAD and EDA softwareShareware and free design tools Fedora Electronic LabOpen-source EDA in one Linux spin Tcl for EDAA free repository of Tcl/Tk tools and scripts All free tools and calculatorsOur online calculators and WaferGenie

Lecture notes and courses

IIT video lecturesFree on YouTube VLSI analog-digital interface circuitsFree video lecture RFIC tutorialsRadio-frequency IC design tutorials MIT 6.823 Computer System ArchitectureLecture notes MIT 6.884 Complex Digital SystemsStudent projects Most significant papers on IC testLandmark ITC papers

Guides and e-books

Design guidelines for digital electronicsNASA design guidelines and criteria Free e-books and publicationsFree engineering e-books Book notes and reviewsOur books page

More coming

We are adding checklists, templates and other downloads. Want to be told when new ones arrive, or have something useful to share? Email us.