PCBVault Tools
Free calculators, pin checkers, and scanners.
Verify your design parameters, check pin configurations, generate code, and catch common hardware mistakes before they reach your physical circuit.
Interactive utility suite
Free online tools for hardware designers
Quick tools to isolate faults, verify ratings, and design reliable PCB routing.
⚡ Circuit & Power Calculations
Interactive helpers to size components, calculate voltages, and estimate power rails.
Ohm's Law
LED Resistor Calculator
Determine the correct current-limiting resistor value for single or series LEDs based on source voltage.
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Ohm's Law
Voltage Divider Calculator
Determine resistor pairs to create reference voltages, read high-voltage sensors, or shift signal levels.
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Power
LM317 Regulator Calculator
Calculate output voltages, verify resistor dividers, and list nearest standard values for linear regulators.
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Power
Power Supply Calculator
Estimate total current and catch brownouts, relay noise, SIM800L transmit bursts, and servo spikes.
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📐 PCB Layout Utilities
Trace width, clearance, via geometry, and thermal parameters for board routing.
🔌 Hardware Diagnostics & Triage
Pin check utilities, I2C scanners, and reliability scoring charts to debug circuits.
Triage
Reliability Score Calculator
Score your power, wiring, isolation, firmware debugging setup, and PCB readiness before fabrication.
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Pins
ESP32 Pin Checker
Check boot-sensitive pins, flash-connected pins, and input-only GPIOs before routing SMT layouts.
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I2C
I2C Address Scanner
Generate Arduino and ESP32 scanner code to verify OLED, display, sensor, and RTC addresses.
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Free bench checklist
Use the tools, then keep the rescue checklist beside your bench.
Get the printable checks for power, wiring, module isolation, ESP32/Arduino symptoms, and breadboard-to-PCB readiness.