Online Engineering Tools
Free browser-based calculators and utilities for electronics engineers, CNC operators, and automation specialists.
Curve Fitting & Regression Calculator
Fit polynomial (degree 1โ10), exponential, logarithmic, or power-law curves to measured data. Generates Chart.js plot, Rยฒ statistics, and ready-to-use C/Arduino/MicroPython code with Horner's form optimisation. Includes LUT generator for MCUs without FPU.
Open Tool โPID Tuner Simulator
Interactive Kp/Ki/Kd sliders with live step-response simulation. Enter plant transfer function parameters and visualise closed-loop response. Tune before connecting hardware.
Coming SoonGRBL Settings Calculator
Enter motor steps/rev, microstepping, and lead screw pitch โ output $100โ$102 (steps/mm) values for GRBL. Computes max step frequency, motor RPM, and generates ready-to-paste GRBL terminal commands for all 5 axes.
Open Tool โEncoder PPR Calculator
CPR ร decoding mode = PPR; max count frequency at any RPM; angular and linear resolution; minimum timer clock for reliable decoding; MCU encoder counter compatibility table.
Open Tool โPCB Trace Width Calculator
IPC-2221B compliant: enter current, temperature rise, and copper weight โ minimum trace width for external and internal layers. Also calculates resistance, voltage drop, and power dissipation over a specified trace length.
Open Tool โModbus RTU CRC16 Calculator
Compute CRC16 for a Modbus RTU frame, or verify an existing frame with CRC. Colour-coded frame visualiser identifies address, function code, data, and CRC bytes. Includes built-in examples for all common function codes.
Open Tool โPWM Frequency Calculator
MCU system clock, prescaler, and TOP value โ PWM frequency and duty cycle resolution. Covers RP2350, ATmega, STM32, ESP32 prescaler/counter configurations.
Coming SoonRS-485 Termination Advisor
Cable length, baud rate, and cable impedance โ recommended termination resistor value. Explains when termination is necessary and how to wire it correctly.
Coming Soon