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Electronics Calculators & Tools | ProTechTrader
Free circuit design calculators with instant results
Ohm's Law Calculator
Calculate voltage, current, resistance, and power using Ohm's Law (V=IR)
LED Resistor Calculator
Find the correct current-limiting resistor for your LEDs
Voltage Divider Calculator
Design voltage divider circuits with two resistors
Battery Life Calculator
Estimate runtime based on battery capacity and load current
RC Time Constant Calculator
Calculate time constant for RC circuits (τ = RC)
LC Resonance Calculator
Find resonant frequency for LC circuits
Wire Gauge Calculator
Determine appropriate wire size for current capacity
PCB Trace Width Calculator
Calculate trace width for desired current capacity
Resistor Color Code Decoder
Decode resistor color bands to find resistance value
Capacitor Code Decoder
Decode capacitor markings and codes
Power Supply Calculator
Size your power supply for your project requirements
555 Timer Calculator
Design 555 timer circuits in astable and monostable modes
