Electronics Tools for PCB, Power, Buses, and Bring-Up

Compare Schottky diodes, discrete P-MOSFET stages, and ideal-diode controllers for low-drop power paths, OR-ing, and reverse-current protection.

Paste hex or C arrays to decode HID report descriptors, then edit visually and export HEX, C, TinyUSB, or STM32 snippets. Includes ready-made keyboard, mouse, gamepad, and media-key templates with live explanations.

Best-in-class voltage divider calculator: Vout, current, resistor power, optional load (Rload), ADC input sizing tips, and practical guidance for UART/I²C/logic level shifting.

Design practical Sallen-Key active low-pass and high-pass filters: quick sizing from f0 or from fp/fs specs (Butterworth / Chebyshev I), E-series rounding, op-amp sanity checks, Bode/step plots, and SPICE export.

Advanced Cortex-M HardFault decoder. Analyze CFSR, HFSR, BFAR, MMFAR + stack frame (PC/LR/xPSR). Works great with STM32, nRF, NXP and more.

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 and sleep current, duty cycle, battery capacity, and regulator losses. Useful for low-power embedded system design.

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 an initial via stitching pattern for ground planes. Compare IPC minimum spacing against the EMI lambda over 20 rule and estimate a practical via grid.

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

Calculate PCB trace width from current, copper weight, temperature rise, trace length, resistance, voltage drop, and power loss.

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.

Size I2C pull-up resistors from bus capacitance, cable length, VCC, rise-time limits, and sink current for Standard and Fast mode.

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 JTAG and SWD pinouts for common debug headers and probes. Compare ARM 10-pin, 20-pin, ST-Link, J-Link, Tag-Connect, and more.

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.

Estimate controlled-impedance PCB traces with Hammerstad and Wheeler models. Tune dielectric height, Er, copper, and trace width.

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).