Cheat sheets
Fast-lookup reference tables for common electrical and hardware standards. No fluff — just the numbers you need.
AWG Wire Gauge
Wire gauge to current capacity and common applications for household wiring, extension cords, and speaker wire.
HDMI Versions
HDMI 1.4 vs 2.0 vs 2.1 — bandwidth, max resolution, refresh rate, and features like eARC, VRR, ALLM.
Fuse Color Codes
Automotive blade fuse colors (ATC/ATO mini-blade and maxi-blade) by amperage. Identify a fuse rating at a glance.
Alkaline Battery Sizes
AA, AAA, C, D, 9V dimensions, voltage, and capacity at a glance. Common devices and substitution rules.
Coin Cell Equivalents
Cross-reference table for CR2032, CR2025, CR2016, LR44, SR44 and equivalent brand designations.
Hearing Aid Battery Reference
Size 10, 312, 13, 675 dimensions, voltage, and color dot system quick reference.
Light Bulb Bases
E26, E27, GU10, G9, G4, MR16 base types — quick identification reference.