Popular Development Board Pinouts & GPIO Reference Raspberry Pi Pinout Reference Explore Raspberry Pi pinouts with this free Raspberry Pi Pinout Reference. Identify GPIO pins, power pins, UART, SPI, I2C, PWM, ADC compatibility, and connector layouts for Raspberry Pi boards. Open Tool
Power Electronics & SMPS Design Calculators RC Snubber Circuit Design Calculator (Power MOSFET & IGBT) Calculate snubber capacitor (Cs), damping resistor (Rs), and power dissipation to suppress parasitic ringing and voltage spikes across switches. Open Tool
Popular Passive Component Calculators (RLC Circuits) RC Time Constant & Capacitor Charge/Discharge Calculator Calculate RC time constant (τ), instantaneous capacitor voltage, current, and charging/discharging time intervals across 5 time constants. Open Tool
Passive Component Calculators (RLC Circuits) Rectangular Loop Inductance Calculator (PCB Trace & Wire Loop) Calculate self-inductance for single-turn rectangular wire loops and PCB loop antennas from trace width, thickness, and dimensions. Open Tool
RF & Microwave Engineering Calculators Rectangular Waveguide Calculator (WR Standard / TE10 Mode) Calculate cutoff frequencies, dominant mode (TE10), guide wavelength, and wave impedance for standard EIA WR-band rectangular waveguides. Open Tool
RF & Microwave Engineering Calculators Reflection Attenuator Calculator (Quadrature Hybrid Coupler) Calculate PIN diode or varactor termination impedance and attenuation levels for reflection-type variable RF attenuators with 90° hybrids. Open Tool
RF & Microwave Engineering Calculators Reflection Coefficient (Gamma / S11) & Return Loss Calculator Calculate voltage reflection coefficient (Γ / S11), return loss (dB), and mismatch loss from load impedance and system characteristic impedance. Open Tool
Power Electronics & SMPS Design Calculators Reflex Klystron Frequency & Electronic Tuning Calculator Calculate resonant mode number, repeller voltage, transit time, and electronic tuning range for microwave reflex klystron oscillators. Open Tool
Connector Pinouts & Wiring Diagrams Registered Jack (RJ) Connector Pinout Find Registered Jack (RJ) connector pinouts instantly with this free Registered Jack (RJ) Connector Pinout Reference. View RJ11, RJ12, RJ14, RJ25, RJ45, and related connector pin configurations, wiring standards, signal assignments, and networking references. Open Tool
RF & Microwave Engineering Calculators RF AM to PM Conversion Calculator (Phase Distortion) Calculate AM-to-PM conversion coefficient (Kp in °/dB) to quantify phase modulation distortion caused by amplitude fluctuations in RF amplifiers. Open Tool
RF & Microwave Engineering Calculators RF Field Strength & Power Density Calculator (ITU-R / FCC) Calculate electric field strength (V/m, dBuV/m) and RF power density (W/m²) at any distance from a transmitter per ITU-R P.525 standards. Open Tool
Popular RF & Microwave Engineering Calculators RF Link Budget Calculator (Fade Margin & Received Sensitivity) Calculate total RF link margin, receiver signal level (RSL), and path attenuation across wireless and satellite communication channels. Open Tool
RF & Microwave Engineering Calculators RF Phase Noise to Phase Jitter Converter (IEEE Std 1139) Convert single-sideband phase noise (dBc/Hz) into RMS phase jitter (femtoseconds/picoseconds) and integrated phase error per IEEE Std 1139. Open Tool
RF & Microwave Engineering Calculators RF Power Conversion Calculator (Watts, dBm, dBW, Volts) Convert RF power seamlessly between Watts, milliwatts, dBm, dBW, RMS Voltage (Vrms), and peak-to-peak voltage (Vp-p) for 50Ω and 75Ω. Open Tool
RF & Microwave Engineering Calculators RF Power Density Calculator (FCC / ICNIRP Safety Limits) Calculate plane-wave RF power density (W/m², mW/cm²) and safe exposure distance from transmitter power, antenna gain, and frequency. Open Tool
RF & Microwave Engineering Calculators RF Power Ratio & Voltage Ratio Calculator (dB / Linear) Convert linear power and voltage ratios (P2/P1, V2/V1) into decibels (dB) and determine exact amplification or attenuation factors. Open Tool
RF & Microwave Engineering Calculators RF Transformer & Impedance Ratio Calculator (Guanella / Ruthroff) Calculate turns ratio, impedance transformation ratio, and coupling efficiency for broadband RF transmission line transformers (Guanella / Ruthroff). Open Tool
Analog Electronics & Op-Amp Calculators RLC Circuit Reactance Calculator Calculate inductive reactance, capacitive reactance, total reactance, impedance, resonance frequency, phase angle, and AC circuit characteristics for RLC circuits. Open Tool
Popular Power Electronics & SMPS Design Calculators RMS & Average Value Calculator (AC & Periodic Waveforms) Calculate True RMS and mathematical average values for sine, half-wave, full-wave rectified, triangular, and pulse AC power waveforms. Open Tool
Popular Power Electronics & SMPS Design Calculators RMS Voltage (Vrms) Calculator (True RMS / AC Electrical) Calculate True RMS Voltage (Vrms) from peak voltage (Vp), peak-to-peak voltage (Vp-p), or average voltage for all standard AC waveforms. Open Tool
Popular Engineering Utility Tools & Converters Series and Parallel Capacitor Calculator (Equivalent Capacitance Ceq) Calculate total equivalent capacitance (Ceq) and voltage distribution across multiple capacitors connected in series, parallel, and networks. Open Tool
Popular Engineering Utility Tools & Converters Series and Parallel Inductor Calculator (Equivalent Inductance Leq) Calculate total equivalent inductance (Leq) and stored magnetic energy for uncoupled and coupled inductors connected in series and parallel. Open Tool
Popular Engineering Utility Tools & Converters Series and Parallel Resistor Calculator (Equivalent Resistance Req) Calculate total equivalent resistance (Req) and individual current/power dissipation for resistors connected in series, parallel, and combinations. Open Tool
Passive Component Calculators (RLC Circuits) Series-Parallel Impedance Conversion Calculator (Rs-Xs to Rp-Xp) Convert series impedance (Rs + jXs) into equivalent parallel admittance (Rp || jXp) and calculate circuit quality factor (Q) instantly. Open Tool
Electronics Engineering Resources, Charts & Tables SI Prefix Table Browse the complete SI prefix table with decimal multipliers, powers of ten, symbols, scientific notation, and metric unit prefixes used in engineering, electronics, science, and mathematics. Open Tool
Electronic Circuit Diagrams & 555 Timer Projects Simple Moisture Sensor Circuit using 555 Timer Simple moisture sensor circuit using 555 timer with complete circuit diagram, soil moisture detection, working principle, components, alarm operation, and practical applications. Open Tool
Electrical & Engineering Calculators SINAD to ENOB Converter (Effective Number of Bits / IEEE 1241) Convert Signal-to-Noise and Distortion ratio (SINAD in dB) to Effective Number of Bits (ENOB) for high-speed ADCs per IEEE Std 1241. Open Tool
Popular Electrical & Engineering Calculators Single & 3-Phase Transformer kVA, Voltage & Current Calculator Calculate full-load primary/secondary current (Amps), rated kVA, and phase voltages for single-phase (1Φ) and three-phase (3Φ) transformers. Open Tool
Passive Component Calculators (RLC Circuits) Single-Layer Coil Inductance Calculator (Wheeler Formula / Air-Core) Calculate self-inductance in microhenries (µH) for single-layer air-core cylindrical solenoids and RF coils using Wheeler's classical formula. Open Tool
RF & Microwave Engineering Calculators Skin Depth & Surface Resistance Calculator (Copper & Metals) Calculate electromagnetic skin depth (δ) and surface resistance (Rs) for copper, aluminum, gold, and silver across RF frequencies. Open Tool