In this article we will see how can we build a darkness sensor by using LDR sensor. This sensor detect light falling on it and change it resistance accordingly. This change in resistance of LDR detect ...

IR sensor circuit basically consist an IR LED and a Photodiode, this pair is generally called IR pair or Photo coupler. IR sensor work on the principal in which IR LED emits IR radiation and ...

The Darkness Sensor Circuit is a straightforward analog electronics project designed to detect ambient light levels using a Light Dependent Resistor (LDR), a transistor (e.g., BC547), and an ...

Here is a simple tilt sensor based switch circuit diagram which is built using a mercury based tilt sensor. This sensor is place on a box, so when someone opens the box, the buzzer connected with the ...