Dark Sensor circuit | Next Electronics

Light-Dependent Sensor For Multiple Inputs Circuit

This light-dependent sensor utilizes light-dependent resistors (LDRs) to detect the presence or absence of light. The alarm remains inactive as long as the light source illuminating the LDRs is constant. However, if the light is interrupted, the alarm is activated. The...

BC107 Street light circuit

A street light that automatically switches ON when night falls and turns OFF when the sun rises. The circuit uses an LDR to sense the light. The automatic street light circuit functions by utilizing a Light Dependent Resistor (LDR) as the...

Light Barrier Detector

This simple circuit using a single transistor turns ON the relay when light falls on the LDR. The potentiometer is adjusted for the required sensitivity. The power supply is 6V. Be careful about the impedance of the relay. Its impedance...

Sun wake-up call

A cadmium sulfide photocell (LDR1), which functions as a light-dependent resistor, is connected to the base and collector of an NPN transistor (Q1). When light strikes LDR1, its internal resistance decreases from a very high value (in darkness) to a...

Automatic Garden Lamp Simple Electronic Circuit Schematic for Turn-on and Turn-off Lamp Automatically

Adjust the value of R1 to achieve optimal performance of the LDR sensor. If, in practice, a resistance of 2.2 MΩ still activates the lamp, it is possible to increase the value of R1 to a larger resistance of 2.2...

Scoobas Solution Sensing Tactic

This document serves multiple purposes, primarily to document the methods employed by a Scooba robot to detect: a) the presence of an acceptable cleaning solution being delivered to its pump, and b) the excess presence of used solution collected off...

Field disturbance sensor-alarm

The change in ambient light triggers the alarm by changing the resistance of LDR1 and LDR2. The circuit utilizes two light-dependent resistors (LDR1 and LDR2) to detect variations in ambient light levels. LDRs are passive components that exhibit a change in...

case stepper

Beige Bag Software has been offering affordable and innovative circuit design tools since 1990. B2 Spice provides schematics as well as analog, digital, and mixed-mode electronic circuit simulation. It integrates with EAGLE and CADSTAR PCB software. B2 Spice is a powerful...

Automatic Garden Lamp Simple Electronic Circuit Schematic for Turn-on and Turn-off Lamp Automatically

Adjust the value of R1 to achieve optimal performance of the LDR sensor. If, in practice, a resistance of 2.2 MΩ still activates the lamp, it is possible to increase the value of R1 to a larger resistance of 2.2...