Logic

Always-on circuit guide

Updated 3/8/2026

Always-on circuit guide

This circuit will check a device - in this example a Wall Light - and restart it, if it will shut down / deactivate for a reason.

<gallery> AlwaysOnCircuit.jpg|Full Visual with Settings </gallery>

AlwaysOnCircuit.jpg

Trivia

  • This little thing was invented by user "Simoyd" in discord-chat "logic-ciruit-discussion" and needed and created by user "Raumfahrtdoc"
  • This is super useful to restart the Kit (Gas Generator) / Gas Generator

Improved version

![Improved Always-On-Circuit using only two I/O and two processing units.](Improved Always-On-Circuit.png)

  • Improved Always-On-Circuit using only two I/O and two processing units.*

Using the new Min/Max Unit as an OR gate and Compare unit as a (controlled) NOT gate, a much cheaper version is possible. Basically, it is a controlled clock that only runs when the device is off and otherwise stays at 1. The circuit can also be modified easily to make an always-off circuit (e.g. to auto-close doors), see table below.

+ Circuit setup
**Unit name
reader
max
compare
writer