9V battery LDR sensor 50K, 1K Ohm resistor BC547 Transistor So when sufficient light falling on LDR the resistance of LDR in very low, as a result all current is flowing from resistor R2 AND LDR so ...

LDR-Darkness-sensor-circuit 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 ...

NPN transistor can also be used as amplifier having a gain value of 110 to 800. Check all the NPN transistor circuits here. CIRCUIT DIAGRAM: WORKING of Key-Hole Light Circuit: After connecting the ...

Smart Curtains Circuit Diagram The circuit is very simple. Any kid will also be able to make it. You just need basic breadboard skills. Connect wires as per circuit shown. I've connected the servo to ...

The amount of light reaching the LDR from the LED decreases as the pipe is bent, and with a simple divider circuit a voltage can be read by an Arduino.

Through a set of webpages, users can remotely control a light intensity sensed through a Light Dependent Resistor (LDR) sensor connected in an arm of a configurable Wheatstone Bridge (WB), whose ...