Bench & Diagnostics Tools
Interactive workbench utilities for electronics repair, component identification, and circuit diagnostics
Eleven free, browser-based electronics bench tools — from resistor colour-code decoding to retro hardware diagnostics, an interactive IC pinout finder and a chip substitution cross-reference. Pick a tool below to open its dedicated page, or use the strip to jump between them.
Resistor & Capacitor Calculator
Colour-band decoder for 4- and 5-band resistors with live tolerance range, plus SMD resistor and capacitor marking decoders.
Open tool →RF & Wireless Reference
Filterable cards covering sub-GHz, ISM, Wi-Fi, Bluetooth, infrared, NFC/RFID and mesh standards, each with a full protocol deep dive.
Open tool →IR vs. RF Remote ID
A short decision tree that identifies a remote from non-invasive checks, then hands you the bench tests that confirm the verdict.
Open tool →Circuit Block Visualizer
Click through power input, regulator, MCU, oscillator and output stages, scope any test point, then inject a fault and watch it propagate.
Open tool →555 Timer & LED Calc
555 astable calculator with a real-time waveform preview, alongside an LED resistor calculator that gives the nearest E24 value and wattage.
Open tool →Pinout Reference
Clickable diagrams for USB-C, RJ45, DB9, HDMI and the ESP32 DevKit, with signal names, electrical specs and wire colour standards.
Open tool →IC Pinout Quick-Finder
Searchable pinout library for 74-series logic, CMOS, retro CPUs and vintage sound and video ICs, each with a colour-coded package diagram and datasheet links.
Open tool →Ohm's Law Wheel
Solve for voltage, current, resistance or power from any two known values, with the formula used shown for each result.
Open tool →Hardware Diagnostics
Choose a machine and a symptom, then follow a measurement-driven flowchart to the components most likely at fault.
Open tool →Recap & Repair Reference
Cross-checked capacitor lists by machine and board revision, filterable by family, each opening into a full recap guide.
Open tool →Substitution Guide
Look up safe chip substitutions for retro DRAM, CPUs and 74-series logic, with red-flagged dangerous swaps and a logic family compatibility matrix.
Open tool →