A Level Interactive Tools

Build finite state machines, add states and transitions, then test input strings with step-by-step trace

Define transition rules, set up the tape, and step through or run Turing Machine computations

Write formal regular expressions and test strings against them using an NFA-based engine

Write BNF production rules and test whether strings belong to the generated language

Interactive mantissa/exponent ↔ decimal converter with normalisation steps

Practice unsigned/signed addition, subtraction, and shifts

Convert between decimal, binary, and hexadecimal with working shown

Parity bits, majority voting, checksums, and check digits

Interactive pixel grid painter — see how resolution and colour depth affect image quality and file size in real time

Waveform sampler showing how sample rate and bit depth capture an analog signal, with file size calculation

Draw and test circuits with AND, OR, NOT, XOR, NAND, NOR gates

Build and test half adder and full adder circuits

Visualise edge-triggered D-type flip-flop behaviour