Light control principle circuit rooster crows
Description: The circuit principle is illustrated in the accompanying figure. When the night light shines on the photosensitive resistor RG, it exhibits a high resistance (significantly greater than 50K). As a result, the output of the LSE pin is low, causing the transistor VT1 to conduct. This activates relay J, which opens its normally closed contacts, preventing the chicken sounds analog circuit IC KD5609 from operating due to lack of power. At dawn, when light hits the RG, its internal resistance decreases to around 50K. Consequently, the LSE pin output becomes high, turning off the transistor VT1 and allowing relay J to release and close its contacts. This action powers the chicken sounds analog circuit, enabling realistic chicken sounds to emanate from the speaker BL.
The described circuit operates as a light-sensitive activation system that controls sound output based on ambient light conditions. The core component, a photosensitive resistor (RG), is pivotal in determining the circuit’s response to light levels. During nighttime, RG maintains a high resistance, which keeps the output of the LSE pin low. This low output signals transistor VT1 to conduct, thereby energizing relay J. The relay's normally closed contacts open, effectively disconnecting power from the chicken sounds analog circuit IC KD5609, silencing the output.
As dawn approaches and light levels increase, the resistance of RG decreases significantly, reaching approximately 50K. This change triggers a transition in the LSE pin output to high, which turns off transistor VT1. The deactivation of VT1 allows relay J to return to its default state, closing its contacts. This closure restores power to the IC KD5609, activating the chicken sounds circuit. The result is an engaging auditory experience, with realistic chicken sounds produced through the speaker BL, thereby simulating a natural morning environment.
The circuit can be utilized in various applications, such as in educational projects, automated farm settings, or as a novelty alarm clock feature. Proper component selection is essential for ensuring that the photosensitive resistor and transistor can handle the expected ranges of light and current. Additionally, the relay must be rated to manage the load of the connected sound circuit. Overall, this light-activated circuit exemplifies a practical implementation of basic electronic principles to create an interactive and responsive system. Circuit principle is shown in FIG apparatus. When the night light irradiation on the photosensitive resistor RG, RG of great resistance, (much larger than 50K), so the LSE O, f eet equivalent open, LSEs pin output low, transistor VT1 conduction, excitation relay J pull its normally closed contacts j oFF, chicken sounds analog circuit IC KD5609 does not work without power. Once dawn, light irradiated on the RG, RG internal resistance becomes smaller ( 50K), this time the LSE pin output high, the transistor VT1 end, the relay J release, closes its contact j, analog sounds of chickens circuit energized work, accompanied by realistic sounds of chickens from the indicator in the speaker BL.
The described circuit operates as a light-sensitive activation system that controls sound output based on ambient light conditions. The core component, a photosensitive resistor (RG), is pivotal in determining the circuit’s response to light levels. During nighttime, RG maintains a high resistance, which keeps the output of the LSE pin low. This low output signals transistor VT1 to conduct, thereby energizing relay J. The relay's normally closed contacts open, effectively disconnecting power from the chicken sounds analog circuit IC KD5609, silencing the output.
As dawn approaches and light levels increase, the resistance of RG decreases significantly, reaching approximately 50K. This change triggers a transition in the LSE pin output to high, which turns off transistor VT1. The deactivation of VT1 allows relay J to return to its default state, closing its contacts. This closure restores power to the IC KD5609, activating the chicken sounds circuit. The result is an engaging auditory experience, with realistic chicken sounds produced through the speaker BL, thereby simulating a natural morning environment.
The circuit can be utilized in various applications, such as in educational projects, automated farm settings, or as a novelty alarm clock feature. Proper component selection is essential for ensuring that the photosensitive resistor and transistor can handle the expected ranges of light and current. Additionally, the relay must be rated to manage the load of the connected sound circuit. Overall, this light-activated circuit exemplifies a practical implementation of basic electronic principles to create an interactive and responsive system. Circuit principle is shown in FIG apparatus. When the night light irradiation on the photosensitive resistor RG, RG of great resistance, (much larger than 50K), so the LSE O, f eet equivalent open, LSEs pin output low, transistor VT1 conduction, excitation relay J pull its normally closed contacts j oFF, chicken sounds analog circuit IC KD5609 does not work without power. Once dawn, light irradiated on the RG, RG internal resistance becomes smaller ( 50K), this time the LSE pin output high, the transistor VT1 end, the relay J release, closes its contact j, analog sounds of chickens circuit energized work, accompanied by realistic sounds of chickens from the indicator in the speaker BL.
Put That Light Out
If the light in a seldom-used room, such as a loft, is forgotten and left on, it can remain illuminated for extended periods, leading to significant electricity costs. To address this issue, electronics enthusiasts can design a simple circuit to...
Electronic Night Light
This circuit was submitted by Adam from Canada who is still at school. I have provided the text. The two transistors are used as a direct coupled switch, Adam used 2SC711 but any general purpose transistor will do e.g. 2N3904,...
Automatic light control circuit curtains
The circuit operates as follows: each morning, light enters the silicon photocell, generating a force that causes transistor VT1 to conduct. As a result, capacitor C charges, leading to an increase in voltage. This rising voltage causes the emitter current...
Night Light schematic
The complete hardware schematic of the Night Light Saver V6.0 includes an AC line protected by a 1A fuse (F1). Any short circuit caused by the components of the saver will blow the fuse. Resistor R1 and capacitor C1 limit...
Night Light circuit
The Saver V5.0 operates a simple clock emulation program that controls a night light to turn on and off at preset times, specifically from 19:00 to 22:00 daily. This design is characterized by its low cost, easy installation, lack of...
Night Light Saver
The Saver V5.0 runs simple clock emulation program, turns a night light on and off with preset time, say 19:00 to 22:00 everyday. The design features low cost, easy installation, no battery backup and no EMI. The AT89C2051 uses external...
3-Way Light Control
This hookup is useful in certain house wiring situations where only two wires are available between switches, rather than the usual three-way setup that requires three wires. SI and S2 are standard three-way switches, while S3, a double-pole double-throw (DPDT)...
Light control relay control lamp
The circuit operates on 220V AC input, which is transformed to approximately 12V DC using a step-down transformer (T), a diode bridge rectifier (VDI-VD4), and a filter capacitor (C1). This setup is designed to power the entire circuit. The light...
Photosensitive resistor circuit diagram of an automatic lighting
This circuit diagram illustrates an automatic lighting system designed for use in hospitals, dormitories, corridors, and public spaces. The system utilizes a photosensitive resistor to control the lighting, ensuring that lights are automatically turned off during the day and activated...