How Circflow Is Built & Verified

Last reviewed: 2026-06-02 · Maintained by Circflow Editorial

Circflow is a focused toolbox of electronics calculators, decoders and pinout references. It is run by a small editorial team (Circflow Editorial) that cares about one thing above all: the numbers have to be right. This page explains exactly how we keep them right, so you can judge the site for yourself.

1. Where every number comes from

A hard rule on this site: we never type standard values from memory. Every standard figure is either transcribed from an authoritative standard or official datasheet, or generated by a known formula and then cross-checked against the authoritative table. The references are listed on the Primary Sources page — IEC 60063 (E-series), IEC 60062 (colour codes), IEC 60529 (IP ratings), JEDEC (logic levels), TIA-568 (cabling), USB-IF, and manufacturer datasheets for IC pinouts, among others.

2. A verification card for every tool

The logic of each tool ships with a .sources.md verification card in the repository that records, item by item: the formula/standard used, its version, the data source, the validation cases, and anything still “pending manual verification.” If a value is uncertain — for example a pinout that varies by board, or a safety-sensitive figure — we mark it as pending rather than guess.

3. Every calculator is unit-tested

Each calculator's maths lives in a small, framework-agnostic JavaScript module with its own automated unit tests (a growing suite, 590+ cases today), including the edge cases and error branches. The pre-computed “common case” result pages are generated by running those same tested functions at build time — the worked answers you see are never hand-typed, so they cannot drift from the calculator.

4. No backend, no tracking on your calculations

Every tool runs entirely in your browser. There are no server calls and no third-party API behind the maths, so your inputs never leave your device, results are reproducible, and the tools work offline. Bookmarks and history use your browser's local storage only. See the Privacy Policy.

5. When real hardware is involved

Results that touch physical hardware — trace width, current capacity, package dimensions, pinouts, voltage levels — are reference estimates. Those tools carry a visible disclaimer telling you to confirm against the device datasheet and the latest standards before committing to a design or production. The full terms are on the Disclaimer page.

6. Keeping content current

Standards get revised and parts get superseded, so articles carry a visible published / last-updated date, and we review the figures periodically rather than letting pages go stale. If you spot something that looks wrong or out of date, that feedback is exactly what triggers a review.

7. Affiliate transparency

Some component-reference pages may link to parts suppliers. Where a link is a paid affiliate link, it is disclosed — it never changes the data, the recommendation, or the price you pay. See the Affiliate Disclosure.

Trust & policy pages

• Primary Sources — the standards and datasheets behind the data.
• Disclaimer — reference-estimate terms for physical results.
• Affiliate Disclosure — how affiliate links are handled.
• Privacy Policy — what the site does (and does not) collect.