With the thousands of Arduino ... the main code sporting a simple "if-else" logic. You can readily use the project developer's code as is or change the pin configuration and the LDR's threshold ...

Here is an ultra simple Arduino Night ... Here an LDR (Light Dependent Resistor) is used to measure the light level. The alarm system is triggered when a “Logic High (H)” level signal is detected at ...

I like to visualize things, so I decided to prepare this simple tutorial ... data from Arduino Serial Plotter, you need to program Arduino to read a sensor and direct the data to the Serial Port. Here ...