Dark sensor circuit for detecting presence of darkness or low light levels and trigger an output signal, has LDR used as sensor to detect amount of light present in environment, and LED used as output device to indicate presence or absence of light
	KALAISELVI B; NAGARAJAN M; SREENIVASULU K; REDDY K L; PRAVALLIKA G L; SAI G P
	2023-10-16
专利权人	BHARATH HIGHER EDUCATION & RES INST (BHAR-Non-standard)
申请日期	2023-10-16
专利号	IN202341069661-A
成果简介	NOVELTY - The dark sensor circuit has a Light Dependent Resistor (LDR), a resistor, a BC547 transistor, and an LED. The LDR is used as a sensor to detect the amount of light present in the environment, and the BC547 transistor is used to amplify signals and switch currents. The LED is used as an output device to indicate the presence or absence of light. The circuit is constructed by connecting the LDR and resistor in series, connecting the junction between the LDR and resistor to the base of the BC547 transistor, and connecting the collector of the transistor to the positive terminal of the power supply and the emitter to the positive lead of the LED. The negative lead of the LED is connected to the negative terminal of the power supply. The circuit is powered using a 9V battery or a DC power supply. USE - Dark sensor circuit for detecting the presence of darkness or low light levels and trigger an output signal. ADVANTAGE - When the LDR detects darkness or low light levels, the transistor switches on and allows current to flow through the LED, illuminating it. When there is sufficient light present, the transistor switches off, and the LED turns off. This circuit has potential applications in automatic streetlights, security systems, and energy-saving devices. It is a simple and effective way to detect the presence of darkness or low light levels and trigger an output signal. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) our project is based on DARK SENSOR CIRCUIT USING LIGHT DEPENDENT RESISTER.; (2) the main purpose of a dark sensor circuit is to automatically control the operation of a device based on the level of light in the environment.
IPC 分类号	B82Y-010/00 ; F21V-033/00 ; G06K-019/077 ; G06N-020/00 ; H04N-005/33
国家	印度
专业领域	信息技术
语种	英语
成果类型	专利
文献类型	科技成果
条目标识符	http://119.78.100.226:8889/handle/3KE4DYBR/19844
专题	中国科学院新疆生态与地理研究所
作者单位	BHARATH HIGHER EDUCATION & RES INST (BHAR-Non-standard)
推荐引用方式 GB/T 7714	KALAISELVI B,NAGARAJAN M,SREENIVASULU K,et al. Dark sensor circuit for detecting presence of darkness or low light levels and trigger an output signal, has LDR used as sensor to detect amount of light present in environment, and LED used as output device to indicate presence or absence of light. IN202341069661-A[P]. 2023.

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