Skymningsrelä

Dark Sensitive Switch is a simple project which operates a relay when the light falling on the LDR goes below a set point. This circuit is built using CA3140 Op-amp and can also be considered for use in energy saving application.

* Input - 12 V @ 50 mA

* Relay output - SPDT relay

* Onboard preset to set the level

* Relay On LED indicator

* Power Battery Terminal (PBT) for easy relay output connection

* Four mounting holes of 3.2 mm each

* PCB dimensions 44 mm x 51 mm