Factorio circuit ratios: green, red and blue
Build 3 copper cable assemblers for every 2 green circuit assemblers. With assembling machine 2, that block makes 3 green circuits per second, so a full yellow belt (15 per second) takes 15 cable and 10 circuit assemblers.
Green circuits (electronic circuits)
A green circuit takes 0.5 seconds and uses 1 iron plate and 3 copper cable. Copper cable takes 0.5 seconds and makes 2 cable from 1 copper plate. A circuit assembler therefore uses cable 1.5 times as fast as a cable assembler makes it: 3 cable assemblers for every 2 circuit assemblers, whatever machine tier you use, as long as both are the same.
| Assembler | Green circuits per second, per circuit assembler | For one yellow belt (15/s) |
|---|---|---|
| Assembling machine 1 (speed 0.5) | 1 | 15 circuit + 23 cable assemblers |
| Assembling machine 2 (speed 0.75) | 1.5 | 10 circuit + 15 cable assemblers |
| Assembling machine 3 (speed 1.25) | 2.5 | 6 circuit + 9 cable assemblers |
A full yellow belt of green circuits uses 15 iron plates and 22.5 copper plates per second.
Red circuits (advanced circuits)
A red circuit takes 6 seconds and uses 2 green circuits, 2 plastic bars and 4 copper cable. With assembling machine 2, twelve red circuit assemblers make 1.5 red circuits per second and need, every second, 3 green circuits (2 circuit and 3 cable assemblers), 6 more copper cable (2 cable assemblers) and 3 plastic bars (1.5 chemical plants).
Blue circuits (processing units)
A blue circuit takes 10 seconds and uses 20 green circuits, 2 red circuits and 5 sulfuric acid. That is a lot of green circuits: 1 blue circuit per second needs 20 green circuits per second, more than a full yellow belt.
Ready-made builds: circuit blueprints.