ohm

Quick Start

Install via jcli

jcli install ohm

Bench-side calculations

# Ohm's law — solve any two of V/I/R/P
ohm calc ohm --v 9 --r 470

# Voltage divider — emits an ASCII schematic alongside the numbers
ohm calc vdiv --vin 5 --r1 10000 --r2 4700

# Current-limiting resistor for an LED (closest E24 included)
ohm calc clim --vsupply 5 --vdrop 2.1 --i 0.02

# 4-band resistor decoder (English or French colour names)
ohm id rcc --read 'red red brown gold'

# Ceramic capacitor 3-digit code
ohm id cap --type ceramic --code 104K

# UK wire ampacity (BS 7671) — NEW vs the Python build
ohm --region uk ref awg --gauge '2.5 mm²'

# Markdown report for engagement notes
ohm --output markdown calc vdiv --vin 5 --r1 10000 --r2 4700

Categories & modules

Improvements over the Python 0.1.x

• Markdown output alongside text / json / csv — ready for engagement deliverables.
• UK region (BS 7671) added to ref awg alongside US (NEC) / EU (NF C 15-100) / JP (JIS).
• ASCII schematic diagrams for voltage divider, RC low-pass, RL low-pass, LC parallel, and current-limit circuits — printed alongside the calculation.
• Operator pivot URLs — every id result (resistor / cap) emits an Octopart + Digikey search URL pre-formatted for the identified part.
• Persistent config at ~/.config/ohm/config.json — same schema as the Python build so config files migrate.
• Zero runtime deps — single Rust binary, no Python toolchain.

Global flags