Civilization manualBook 1: From Bare Hands to Steam and Electricity765 entries · 23 phases · 100 years
The Island
Phase 14 — Electricity, generators, motors and batteries  /  About year 40
14.14

Commutator and brushes

collect current from a turning coil in one direction

MakingYear 40Stands on 171 earlier

AWhat it needs

Needs 171 other products in all, 4 of them directly.

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