If you need to build a dark detector and turn on or off a switch this might be a good way to do it . What do you think?
MikeM drew it up so look at the final simulation
https://www.electro-tech-online.com/threads/dark-detector.144195/page-2#post-1215803
Post 33
Testing this out it seems good from about 10 Volts through to 30 Volts . The resistor on the relay is only because its a 12 V relay and it gets hot so the extra resistor dissipates some heat . Take it out on 12 V olt systems
MikeM drew it up so look at the final simulation
https://www.electro-tech-online.com/threads/dark-detector.144195/page-2#post-1215803
Post 33
Testing this out it seems good from about 10 Volts through to 30 Volts . The resistor on the relay is only because its a 12 V relay and it gets hot so the extra resistor dissipates some heat . Take it out on 12 V olt systems
Last edited: