Free Electronics Design Tools
Professional calculators and utilities for embedded hardware engineers.
Voltage Divider Calculator
Compute output voltage, divider current, resistor dissipation, and tolerance stack with compact/full views.
Current Estimation Calculator
Calculate battery life and current consumption for multi-state embedded systems with multiple power rails and load profiles.
ATSAMD Pin Configuration
Interactive pin configuration tool for ATSAMD21 microcontrollers. Configure SERCOM, TCC, ADC, and other peripherals with visual pin diagrams.
Serial Monitor
Web-based serial terminal with IC status visualization. Monitor 16-bit registers in real-time using the Web Serial API.
KiCad OutputJob Plugin
Automate manufacturing output generation from KiCad projects with a reusable OutputJob workflow plugin.
Panel Utilization Estimator
Calculate how many PCBs fit on a manufacturer panel. Compare JLCPCB, PCBWay, Eurocircuits and others. See how trimming board dimensions improves yield.
PCB Composer
Assemble verified circuit tiles into a routed PCB. Select modules, map signals, and download production-ready Gerbers in 24 hours.
We're adding more tools soon. Have a suggestion? Let us know