{{Techniques infobox
|image           = 
|designers       = 
|date            = 
|vitamins        = 
|materials       = 
|transformations = 
|lifecycles      = 
|parts           = 
|techniques      = 
|tools           = 
|files           = 
|suppliers       = 
|git             = 
|reversible      = true
}}

[[Category:Techniques]]
[[Category:Electric parts]]

=Introduction=
In control theory, a bang–bang controller (2 step or on–off controller), is a feedback controller that switches abruptly between two states. These controllers may be realized in terms of any element that provides hysteresis. They are often used to control a plant that accepts a binary input, for example a furnace that is either completely on or completely off. Most common residential thermostats are bang–bang controllers.

=Challenges=

=Approaches=

=Development targets=

=References=
  * [[https://en.wikipedia.org/wiki/Bang%E2%80%93bang_control|Wikipedia: Bang-bang control]]