Electronics Calculators & Tools

First-pass sizing for buck and boost converters: pick ripple targets, get L/C starting points, sanity-check a chosen BOM, explore worst-case corners, and export a review-ready summary.

Size RS-485 fail-safe bias resistors, sanity-check termination loading, and get practical CAN termination values (classic + split) with quick notes.

Estimate VBAT sag during a peak current burst (I*R + ESR step + RC droop). Size hold-up caps and check brownout margin.

Flash BIN/HEX, run SWD link checks (DPIDR + CPUID), and read memory from a CMSIS-DAP probe — straight from your browser. No installs.

Browser-based BLE debug panel: connect with Web Bluetooth, explore GATT, read/write/notify, plot live values, get RSSI from advertisements (scan/watch when supported), run a GATT link test, and export logs/reports.

Connect to your microcontroller over Web Serial (no install). Monitor logs, send commands, plot data in real-time, and flash firmware on supported boards.

Estimate battery life from active/sleep currents, burst duration, cycle period, and regulator efficiency. Get average current, mAh/day, and Wh/day.

Turn a scope capture into RC snubber values: estimate parasitic L/C from ringing frequency, pick Csnub, and get a starting Rsnub plus loss estimates.

Calculate optimal via stitching pattern for ground planes. Get EMI-compliant spacing (λ/20 rule) and via count based on IPC-2221A standards.

Calculate via current capacity and thermal properties using IPC-2221 standard. Determine how many vias you need for your power traces.

Calculate the minimum PCB track width for your current requirements using the IPC-2221 standard. Get instant results with resistance, voltage drop, and power dissipation calculations.

Calculate the perfect load capacitors for your crystal oscillator. Interactive tool for MCU clock circuits with frequency accuracy analysis and component recommendations.

Design PCB stackups and calculate controlled impedance for high-speed signals. Interactive stackup builder with microstrip, stripline, and differential pair calculations.

Quickly size the pull-up resistors for your I2C bus, estimate rise time, and check compliance with the I2C specification.

Best-in-class coil inductance calculator for single-layer air-core solenoids, plus an experimental rod-core model. Solve for inductance or for turns, switch units, share presets, and learn theory/limits with a concise FAQ.

Quickly calculate the required series resistor for your LED. Find the nearest standard resistor value and power dissipation to safely light up your project.

Calculate frequency, duty cycle, and pulse duration for 555 timer circuits in astable or monostable mode.

Convert AWG to mm and mm², check ampacity (with bundling derating), compute voltage drop with temperature/material, and compare gauges visually. Includes exportable reference table.

Interactive T568A/B pinout tool for creating straight-through or crossover Ethernet cables. Includes cable category guides and use-cases.

Find and verify JTAG and SWD pinouts instantly. Select your target connector and debugger (like ST-Link, J-Link, or Picoprobe) to get an interactive wiring diagram and prevent connection errors.

Interactive reference and configuration tool for the 24‑pin USB Type‑C connector. Select common use-cases to see exactly which pins you need to connect.

Calculate skew between differential pair traces and determine required length adjustments for timing alignment.

Calculate the characteristic impedance (Z₀) of a microstrip PCB trace using Wheeler's or Hammerstad & Jensen's approximations based on your PCB stackup parameters.

Create and visualize cable harness diagrams directly by describing them in YAML. Generate instant SVG pinouts for your electronics and electrical harness projects.

Easily calculate and validate I²S and TDM clock configurations (BCLK, LRCK, MCLK) for your digital audio projects. Ensure correct clock ratios for MCUs, CODECs, DACs, and ADCs based on sampling rate, bit depth, and channel count.

Interactively calculate and visualize the frequency response (Bode plots) of common RC and RL passive electronic filters. Determine cutoff frequencies, and analyze magnitude and phase characteristics.

Interactively generate M.2 connector pinouts based on module key (A, B, E, M) or application (SSD, Wi-Fi, WWAN). Filter pins and view keying diagrams. Find the specific M.2 pin configuration you need.

Determine the best series resistor (Rs) for an NTC thermistor to maximize voltage swing or improve linearity over a specific temperature range. Calculates standard E12 resistor values.

Easily calculate resistor values from color codes. Supports 4-band, 5-band, and 6-band resistors, including tolerance and temperature coefficient (TCR).

Easily calculate the output voltage (Vout) of a resistive voltage divider. Enter input voltage (Vin), R1, and R2 values. Also calculates total current.