Electronics & Circuit Engineering
Design perfboards, simulate stripboard layouts, route wire netlists, calculate resistor values, and solve engineering equations 100% offline.
Available Utilities
Resistor Color Code Decoder
Decode 4, 5, or 6-band resistor color codes using an interactive visual band-picker, with E12/E24 nearest series value comparison.
Ohm's Law Calculator
Calculate electrical Voltage, Current, Resistance, and Power using any two known variables under Ohm's Law.
Voltage Divider Calculator
Compute output voltage or resistance values for a simple dual-resistor voltage divider network.
LED Resistor Calculator
Determine the required series resistance and minimum power rating for single or multiple series LED indicator circuits.
Series/Parallel Equivalence Calculator
Calculate equivalent values for resistors or capacitors connected in series or parallel networks.
Wheatstone Bridge Calculator
Calculate the bridge output voltage or determine the unknown balancing resistor in a Wheatstone Bridge circuit.
555 Timer Calculator
Design astable or monostable 555 timer circuits, computing frequency, duty cycle, period, and pulse intervals.
Decibel (dB) Converter
Convert linear voltage or power ratios to Decibels (dB) and vice-versa.
RC Filter Cutoff Frequency Calculator
Calculate the cutoff frequency (-3dB) of a resistor-capacitor (RC) low-pass or high-pass passive filter.
LC Resonant Frequency Calculator
Calculate the resonant frequency of an inductor-capacitor (LC) tank circuit.
RF Link Budget Calculator
Calculate Free Space Path Loss (FSPL) and estimate signal power at the receiver for wireless links.
PCB Trace Width Calculator
Calculate PCB trace width for target current limits using the IPC-2221 design standard.
AWG Wire Gauge Calculator
Convert American Wire Gauge (AWG) numbers to diameter, cross-sectional area, copper resistance, and ampacity.
Thermal Resistance Calculator
Calculate semiconductor junction temperature based on power dissipation and thermal resistances.
Capacitor Code Decoder
Decode EIA capacitor three-digit number codes and tolerance factors.
Logic Gate Simulator
Simulate AND, OR, NOT, XOR, NAND, and NOR logic gates dynamically.
Binary Calculator
Perform additions, subtractions, and bitwise logical calculations on binary numbers.
Prime Number Generator
Generate lists of prime numbers or test values for primality.
Matrix Calculator
Perform 2x2 matrix multiplication, determinants, and transposes.
Business Days Calculator
Calculate calendar intervals between two dates excluding weekends.
PerfBoard & Stripboard Simulator
Interactive CAD-like browser-based simulator for designing, wiring, and testing Perfboard and Stripboard prototype layouts offline.
Finite Automata Simulator (NFA/DFA)
Draw, design, and simulate Deterministic and Nondeterministic Finite Automata (DFA/NFA) dynamically in-browser.
NFA to DFA Converter
Convert Nondeterministic Finite Automata (NFA) to Deterministic Finite Automata (DFA) using Subset Construction.
DFA Minimizer
Minimize Deterministic Finite Automata (DFA) using Hopcroft's partition-refinement algorithm.
Regex to NFA Converter
Convert regular expression strings into equivalent Nondeterministic Finite Automata using Thompson's construction.
CPU Scheduling Calculator
Free CPU scheduling calculator for FCFS, SJF, SRTF, Priority and Round Robin: Gantt chart plus completion, turnaround, waiting and response times.
Page Replacement Calculator
Count page faults and hits for FIFO, LRU and Optimal page replacement with a frame-by-frame table, compare all three, and check for Belady's anomaly.
Disk Scheduler
Visualize disk head actuator seek tracks for FCFS, SSTF, SCAN, C-SCAN, and LOOK scheduling.
LL(1) Parser
Compute FIRST and FOLLOW sets, remove left recursion, build the LL(1) parsing table, detect conflicts and trace a parse step by step.
LR(0) & SLR(1) Parser
Build LR(0) item sets and the ACTION/GOTO table for LR(0) or SLR(1), find shift-reduce and reduce-reduce conflicts, and trace a bottom-up parse.
Truth Table Generator
Generate the full truth table for a boolean expression with up to 5 variables.
Karnaugh Map Solver
Click cells on a 2, 3, or 4-variable Karnaugh map to get the minimized sum-of-products expression.