Electronic Color Code Calculators & Charts Transistor Color Code Chart (JIS C 7012 & Pro-Electron) Reference guide for decoding color bands and dots on vintage European (Pro-Electron) and Japanese (JIS C 7012 / 2SA / 2SC) transistors. Open Tool
RF & Microwave Engineering Calculators Traveling Wave Tube (TWT) Gain & Power Calculator (Pierce Theory) Calculate RF gain (dB), Pierce gain parameter (C), and output saturation power for helix Traveling Wave Tube (TWT) amplifiers. Open Tool
Active Component & Semiconductor Calculators Tunnel Diode Negative Resistance & Oscillator Calculator (Esaki Diode) Calculate negative differential resistance (NDR), peak-to-valley current ratio (PVCR), and oscillation frequency for quantum tunnel diodes. Open Tool
Cable, Wire Gauge & Voltage Drop Calculators Twisted-Pair Impedance Calculator (TIA/EIA-568 / Ethernet) Calculate differential characteristic impedance (Z0), mutual capacitance, and loop inductance for unshielded twisted-pair (UTP) cables. Open Tool
Electronics Engineering Resources, Charts & Tables UL/CSA Fuse Class Guide Browse UL and CSA fuse classes with current ratings, interrupting capacities, time-delay characteristics, applications, and electrical protection standards for industrial and commercial systems. Open Tool
Electrical & Engineering Calculators Units of Pressure Converter (PSI, Bar, Pascals, atm, Torr) Convert engineering pressure units seamlessly between PSI, Bar, Pascals (Pa, kPa, MPa), Atmospheres (atm), Torr, and mmHg per NIST standards. Open Tool
Active Component & Semiconductor Calculators Varactor Diode Capacitance & Tuning Ratio Calculator (VCO / RF) Calculate junction capacitance (Cj) versus reverse bias voltage (VR) and resonant tuning range for RF varicap / varactor diodes. Open Tool
Popular Connector Pinouts & Wiring Diagrams Video Connector Pinout Reference Find video connector pinouts instantly with this free Video Connector Pinout Reference. View HDMI, DisplayPort, VGA, DVI, RCA, BNC, LVDS, eDP, and other video connector pin configurations, wiring layouts, and signal assignments. Open Tool
Popular Passive Component Calculators (RLC Circuits) Voltage Divider Calculator (Loaded & Unloaded Resistor Divider) Calculate output voltage (Vout), resistor ratios (R1 & R2), and loading effects for unloaded and loaded passive resistor voltage dividers. Open Tool
Popular RF & Microwave Engineering Calculators VSWR, Return Loss & Reflection Coefficient Calculator Convert between VSWR, Return Loss (dB), Voltage Reflection Coefficient (Γ), Mismatch Loss, and Reflected Power percentage. Open Tool
Electrical & Engineering Calculators Watts to dBm Power Converter (Milliwatts, Watts, kW to dBm) Convert electrical and RF power between Watts, milliwatts (mW), kilowatts (kW), megawatts (MW), and logarithmic dBm instantly. Open Tool
Popular Passive Component Calculators (RLC Circuits) Wheatstone Bridge Wheatstone Bridge Calculator (Balanced & Unbalanced Bridge / Strain Gauge) Calculate bridge balance condition, output voltage differential (Vout), and unknown resistance (Rx) for quarter, half, and full-bridge sensor circuits. Open Tool
RF & Microwave Engineering Calculators Whip Antenna Length & Resonance Calculator (Quarter-Wave λ/4) Calculate resonant physical length, radiation resistance, and bandwidth for quarter-wave (λ/4) and 5/8-wave monopole whip antennas. Open Tool
Analog Electronics & Op-Amp Calculators Wideband Differential Amplifier Calculator Calculate wideband differential amplifier gain, bandwidth, CMRR, input impedance, output impedance, resistor values, and frequency response for high-speed analog circuit design. Open Tool
Electronics Engineering Resources, Charts & Tables Wire Ampacity Table Browse standard wire ampacity ratings for copper and aluminum conductors with current carrying capacity, conductor sizes, insulation types, temperature ratings, and electrical installation reference data. Open Tool
Cable, Wire Gauge & Voltage Drop Calculators Wire Loop Inductance Calculator (Circular & Rectangular Loops) Calculate self-inductance for circular and rectangular single-turn wire loops and magnetic loop antennas from wire gauge and loop radius. Open Tool
PCB Design & Trace Calculators (IPC Standards) Wire Microstrip Impedance Calculator (Wire Over Ground Plane) Calculate characteristic impedance (Z0) and propagation delay for a circular wire conductor elevated above a single flat ground plane. Open Tool
Cable, Wire Gauge & Voltage Drop Calculators Wire Over Ground Plane Inductance Calculator (Grover Formula) Calculate partial self-inductance and return loop inductance for a single round wire conductor suspended above an infinite ground plane. Open Tool
Cable, Wire Gauge & Voltage Drop Calculators Wire Self-Inductance Calculator (Straight Round Conductor) Compute high-frequency and DC partial self-inductance for straight round wire conductors, component leads, and bonding wires. Open Tool
PCB Design & Trace Calculators (IPC Standards) Wire Stripline Impedance Calculator (Round Conductor Z0) Calculate characteristic impedance (Z0) of a round wire or cylindrical conductor centered between two parallel conductive ground planes. Open Tool