HC-SR501 with LDR attached to it.

Other Hardware Sensors
10

Thank you for taking the time to help me out with this project.

By "overengineering" you mean there is no need for arduino. Just a combination of PIR, LDR and relay.
( I misguided you when I said Latched Relay ) I do not have a lathed relay I have normal 5v relay module.

I learned a lot from you comments and schematics:

  1. The physical switch must be momentary switch to toggle the status of the lamp.
  2. Using pot will make it easy to adjust the darkness level, which was a major request from my side.
  3. I wonder then if arduino is not used I should rely on my effort to do it and NOT bothering you ( Arduino community) with a problem that is pure electronics.

If my comments make sense to you, then please advice I am at a loss here