Electronics Design Tools, Calculators & Guides
Hub for electronics design knowledge and tools.
Practical guides, clear reference tables, and essential utilities. Straight to the point – for and by electronics enthusiasts.
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Tools
View all →Buck / Boost Designer (Inductor + Caps + Audit)
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.
RS-485 / CAN Termination & Bias Planner
Size RS-485 fail-safe bias resistors, sanity-check termination loading, and get practical CAN termination values (classic + split) with quick notes.
Battery Burst Droop Estimator (Brownout Margin + Hold-up Caps)
Estimate VBAT sag during a peak current burst (I*R + ESR step + RC droop). Size hold-up caps and check brownout margin.
Browser SWD Flasher (CMSIS-DAP / DAPLink over WebUSB)
Flash BIN/HEX, run SWD link checks (DPIDR + CPUID), and read memory from a CMSIS-DAP probe — straight from your browser. No installs.
WebBluetooth GATT Explorer (BLE Read/Write/Notify in the Browser)
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.
WebSerial Board Console (Serial Monitor + Plotter in the Browser)
Connect to your microcontroller over Web Serial (no install). Monitor logs, send commands, plot data in real-time, and flash firmware on supported boards.
Battery Life Calculator (Duty Cycle + Regulator Losses)
Estimate battery life from active/sleep currents, burst duration, cycle period, and regulator efficiency. Get average current, mAh/day, and Wh/day.
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Guides
View all →High-Speed PCB Routing Cheat Sheet (Edge-Rate Based)
A practical, edge-rate based checklist for routing fast digital signals: when a trace becomes a transmission line, return paths, termination, differential pairs, vias, and crosstalk.
Thermal Vias & Copper Spreading (PCB Heat Transfer Guide + Estimator)
Design thermal vias that actually work: what matters (via count, plating, board thickness, fill), how copper spreading limits performance, and a simple estimator to sanity-check your layout.
USB-C Power Delivery Hardware Design (Sink, Source, DRP)
Practical USB-C PD hardware design guide: CC pins, Rp/Rd basics, PD vs resistor-only, PPS/EPR overview, protection, layout, and bring-up checklists.
The Complete Guide to DMA (Direct Memory Access) for Microcontrollers
A practical, in-depth guide to mastering DMA on microcontrollers. From theory to hands-on examples on STM32, learn how to free your CPU and optimize your embedded applications.
How to wire a reliable 1 m I²C sensor
Step-by-step workflow to control capacitance, size pull-up resistors, document a harness and validate the waveforms for a long I²C run.
1-Wire Protocol Explained: A Guide to Timing and Waveforms
A comprehensive guide to the 1-Wire (Dallas/Maxim) bus protocol. Understand the critical timing for the master reset, slave presence-pulse, and the different bit slots for writing and reading data.
SD Card SPI Mode Initialization: A Detailed Guide
A comprehensive guide to the SD card power-up and initialization sequence in SPI mode. Covers the 80-clock cycle startup, CMD0, CMD8, and the critical CMD55/ACMD41 handshake for all card types (SDv1, SDv2, SDHC/SDXC).
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Projects
View all →Browser Hardware Lab (WebSerial / WebBluetooth / WebUSB)
A no-install workflow for board bring-up and interface debugging: WebSerial console + plotter, WebBluetooth GATT explorer, and WebUSB device identification.
USB Device Identifier: Find any USB device's VID & PID
A free online tool to identify any unknown USB device. Just plug in your device, get its Vendor ID (VID) and Product ID (PID), or search our database to find the right drivers.
Open Source Electronics Projects Observatory
Discover the latest and most popular open source electronics projects from the community. A curated list of repositories for ESP32, STM32, KiCad, and more.