Here are some DIY LDR switch circuits available on our website and the web. LDR switches are used to switch a relay or other device when light are present or absent. LDRs or Light Dependent Resistors ...

The primary goal of this project is to design a cost-effective and energy-efficient Dark Switch circuit that automatically controls electrical devices based on ambient light conditions. The project ...

General purpose circuit of the simple pressure sensor alarm is built around a couple of readily available cheap components. Working of this circuit is straight forward and self-explanatory. When the ...

This project presents a light-responsive power-saving system designed using Arduino and basic electronic components. The system starts in an active state (system LED ON). When ambient light is low, ...