Master digital logic from first principles. Tutorials, deep dives, and hands-on guides covering everything from basic gates to CPU architecture.
TL;DR: Binary-coded decimal (BCD) stores each decimal digit 0–9 in its own 4-bit nibble, leaving codes 1010–1111 invalid. Adding two BCD digits requires a "+6" correction whenever the binary sum...
TL;DR: A BCD to 7-segment decoder takes a 4-bit binary-coded-decimal digit (0–9) and lights the right combination of segments a–g on a digital display. The mapping is defined by a...
TL;DR: There is no single "best" digital logic simulator — DigiSim.io leads on curriculum, animations, and multilingual support; Logisim Evolution and Digital (hneemann) win for offline academic use; CircuitVerse is...
TL;DR: Booth's algorithm multiplies signed binary numbers in two's complement by scanning the multiplier two bits at a time and choosing one of three actions per step: add the multiplicand,...
TL;DR: A working CPU is just five subsystems wired together — a register file, an ALU, a tri-state data bus, a RAM module, and a control unit that orchestrates them...
TL;DR: A carry-lookahead adder computes every carry bit in parallel from per-bit generate () and propagate () signals, dropping the addition's critical path from to at the cost of a...
TL;DR: Clock skew is the difference between when a clock edge arrives at one flip-flop and when it arrives at the next. Positive skew (the receive flip-flop sees the edge...
TL;DR: A CPU flags register stores four single-bit results from the most recent ALU operation: Zero (Z) when the result is zero, Carry (C) on unsigned overflow, Negative/Sign (N) equal...
TL;DR: A demultiplexer (DEMUX) is a combinational circuit that takes one data input and routes it to one of output lines, with the destination chosen by an n-bit select code....
TL;DR: DigiSim.io and CircuitVerse are both solid browser-based digital logic simulators. CircuitVerse wins if open source and "completely free forever" are your top priorities; DigiSim wins if curated animated lessons,...
TL;DR: DigiSim.io wins on browser-native, animated lessons, multilingual UI, and modern UX; Logisim Evolution wins on open-source licensing, mature classroom adoption, offline use, and the .circ ecosystem. Most courses can...
TL;DR: Tinkercad Circuits and DigiSim solve different problems — Tinkercad for Arduino, breadboards, and analog electronics; DigiSim for pure digital logic from gates up to CPU architecture. They're not really...
