Description
The RS latch - single decider version, from the Factorio Wiki.
https://wiki.factorio.com/Tutorial:Circuit_network_cookbook#Latches
This is useful for turning on and off parts of the factory without rapid flickering. It can be used for turning off steam power when accumulator charge is high enough, or a mineral patch when contents on the belt is high enough, etc.
https://www.factorio.school/view/-OA7pqw3IABaT1GuOsxp