Observed arrival · 2026-11-05

Ohmlark’s bench calculators

ohmlark.com Visit website

Editorial interest 72/100 Selection signal · not a rating of the site

A set of nine free electronics calculators covers common component, circuit, battery-life, and unit-conversion tasks.

Landing page captured for the 2026-11-05 issue.

For: Makers checking component values during electronics builds
Worth noticing: The sample LED calculation rounds to an E24 value and specifies a 0.125 W part for a 60 mW result.

Field notes

The homepage lists calculators for resistor color codes, voltage dividers, RC filters, LC resonance, 555 timers, battery life, trace width, and unit conversion. It says fields interpret shorthand such as 4k7 and 100n, and that results can be copied or shared as links. A BOM feature is described as adding components to a project; whole-device costing and exports are listed under Pro.

Observed signals

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Editorial observations of this landing page, not a rating.

○OpenPublic substance visible

$PaidCommerce or pricing visible

✦PrettyNotable craft visible

◎NicheUnusually specific use

ƒJavaScriptBrowser-side code central

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