Those in life that apply photoresistors

Hehe, there are too many places where photoresistors are used in life.

Whether it is the sensing of visible light or the measurement of visible light. CDS photoresistors offer a number of excellent solutions. And it is a very economical product, in daily use we call it a low-cost near-infrared visible light detection optoelectronic components.

Epoxy encapsulation. Very high response speed when switching between very low illumination (total darkness 0 lux) and instantaneous bright light (illuminated light intensity).

As far as I know, just a LXD35 series or LXD55 series photoresistor of Longxinda can be controlled by night light, mosquito killer lamp, light trigger, fill light board, digital camera**.

The following is the application written on Long Xinda**. You can check the camera autometering for yourself.

Photoelectric control Indoor light control.

Light control** IC

Consumer Electronic Devices Automated light control management systems for LCD monitors, flat-screen TVs, video cameras, static digital cameras, residential and commercial lighting.

Automotive instrument assembly.

Electronic toys Electronic signs and signal lights.

Xin Yongcheng Optoelectronics is a manufacturing enterprise mainly engaged in photosensitive reception and infrared emission, if you need photosensitive transistors, photosensitive diodes, photosensitive IC infrared lamp emitting tubes, infrared tubes, infrared lights, please contact Xin Yongcheng sales engineer Luo Chuang 15875595222

Light-controlled lights in the stairwell! Once the epiphany is extraordinary, it does not enter the reincarnation of life and death.

1.Wide spectral response range, especially high responsivity to red and infrared radiation2The bias voltage is low and the operating current is high.

3.Wide dynamic range, both strong and low light can be measured.

4.The photoconductive gain is large and the sensitivity is high.

5.The photoresistor is non-polar and easy to use.

Photoresistor is a special kind of resistor, referred to as photoresistor, also known as optical pipe. Its resistance is directly related to the intensity of the light. As the light intensity increases, the resistance decreases; When the light intensity decreases, the resistance increases.

Advantages of photoresistor: 1. The photoelectric effect inside the photoresistor has nothing to do with the electrode (only the photodiode is related), that is, the DC power supply can be used. 2. The sensitivity is related to the semiconductor material and the wavelength of the incident light.

3. Photoresistor epoxy resin encapsulation, good reliability, small size, high sensitivity, fast response speed and good spectral characteristics.

1. Lighting characteristics.

Illumination characteristics refer to the characteristics of the electrical signal output by the photoresistor as a function of illuminance. It can be seen from the illumination characteristic curve of the photoresistor that the resistance of the photoresistor begins to decrease rapidly as the light intensity increases. If the light intensity is further increased, the resistance value changes and then gradually flattens out.

In most cases, this property is nonlinear.

2. Frequency characteristics.

When the photoresistor is irradiated by pulsed light, the photocurrent takes a period of time to reach a stable value, and after the light is stopped, the photocurrent is not immediately zero, which is the delay characteristic of the photoresistor. Due to the different materials due to their different photosensitive and resistive delay characteristics, their frequency characteristics are also different.

It can be widely used in cameras, solar garden lights, lawn lights, money detectors, quartz clocks, cups, gift boxes, mini night lights, light and sound switch, street lamp automatic switch and various light control toys, light control lighting, lamps and other light automatic switch control fields. A few typical application circuits are given below.

Photoresistor is a semiconductor photosensitive device, which not only has the characteristics of high sensitivity, fast reaction speed, good spectral characteristics and r-value consistency, but also maintains a high degree of stability and reliability in the harsh environment of high temperature and humidity.

It is a special resistance that uses the photoconductive effect, and its resistance is directly related to the intensity of the incident light. As the light intensity increases, the resistance decreases; When the light intensity decreases, the resistance increases.

Photoresistor is more sensitive to light, using light to change the size of the resistance, usually the buoy at sea uses the photoresistor as the switch of the channel light, to the night the photoresistor resistance becomes smaller, turn on the control circuit, turn on the light, during the day the photoresistor increases the control circuit to disconnect, turn off the light.

Photoresistors are generally used in control circuits, and with the increase of light intensity, the resistance becomes larger, such as the light control circuits we usually use.

There are more places to apply. It is exposed to light and the resistance becomes smaller. The resistance is greatest when backlit. The resistance of the received light and the backlight is a few k, several hundred k. Taking advantage of this feature, it can be used in street lamp control, sound and light control circuits, and it is also used in factories.

Photoresistors can be widely used in various light control circuits, such as the control and adjustment of lights, and can also be used for light control off. Typical application circuits are: 1. Photoresistor dimming circuit 2. Photoresistor photoswitch.

Photoresistors are widely used in various photo-controlled electronic devices and systems, such as photo-controlled switches, photo-controlled alarms, automatic light adjustment, and photoelectric sensors.

1. The principle and characteristics of photoresistors.

A photoresistor is a typical photoelectric sensor characterized by a change in resistance value with light intensity when exposed to light. In general, the stronger the light intensity, the smaller the resistance value; The weaker the light intensity, the greater the resistance value. This is because photons interact with electrons in semiconductor materials, causing electrons to jump from valence bands to conduction bands, forming conductive properties.

2. Application fields of photoresistors.

Photoresistors have a wide range of applications in many cavity branches. For example, in photoswitching, the photoresistor can realize the automatic control of the switch of outdoor street lights; In photocontrolled alarms, photoresistors can be used to detect light changes and trigger alarms; In automatic light dimming systems, photoresistors can be used to detect indoor light and automatically adjust lighting fixtures.

3. Types and selection of photoresistors.

There are various types of photoresistors, such as cadmium sulfide photoresistors, cadmium selenide photoresistors, zinc sulfide photoresistors, etc. When selecting a photoresistor, it is necessary to consider its sensitivity, response wavelength range, response time, ambient temperature and other factors to meet the needs of different application scenarios.

Design of intelligent lighting system based on photoresistor:

1. The demand for intelligent lighting systems.

With the increasing importance of green energy and energy conservation and emission reduction, intelligent lighting systems have emerged. Smart lighting systems automatically adjust the brightness of lighting fixtures based on ambient light, enabling energy savings, increased comfort, and longer device life.

2. The principle of intelligent lighting system based on photoresistor.

The photoresistor-based intelligent lighting system uses the photoresistor to sense the ambient light, detects the resistance value of the photoresistor in real time through the microcontroller, and automatically adjusts the output power of the lighting equipment according to the preset light range to achieve a constant lighting effect. In addition, the system can set the time control so that the lighting is automatically turned on or off at a fixed time.

3. Application scenarios of intelligent lighting systems.

The photoresistor-based lighting system can be applied to homes, offices, schools, shopping malls and other places to automatically adjust the brightness of lighting and save energy. For example, during the day, when there is enough light in the room, the system can automatically reduce the brightness of the lighting equipment to reduce energy consumption. At night, when the indoor light is insufficient, the system can automatically increase the brightness of the lighting equipment to ensure a comfortable lighting environment.

The basic characteristics of photoresistors include volt-ampere characteristics, illumination characteristics, photoelectric sensitivity, spectral characteristics, frequency characteristics, and temperature characteristics.

Photoresistors are special resistors made of semiconductor materials such as cadmium sulfide or cadmium selenide, and their working principle is based on the internal photoelectric effect. The stronger the light, the lower the resistance, and as the light intensity increases, the resistance decreases rapidly, and the bright resistance value can be as small as less than 1K. Photoresistors are very sensitive to light, and when there is no light, they are in a high-impedance state, and dark resistance is generally reachable.

The special properties of photoresistors will be widely used with the development of science and technology.

A photoresistor is a resistor made by using the photoconductivity effect of semiconductors to change the resistance value with the intensity of the incident light, also known as a photoconductance detector; The incident light is strong, the resistance decreases, and the incident light is weak, and the resistance increases. There is another type of incident light that is weak and the resistance decreases, and the incident light is strong and the resistance increases.

Photoresistors are generally used for light measurement, light control, and photoelectric conversion (converting changes in light into changes in electricity). Commonly used photoresistors are cadmium sulfide photoresistors, which are made of semiconductor materials. The sensitivity of a photoresistor to light (i.e., spectral characteristics) is close to the response of the human eye to visible light, and as long as the light is perceptible to the human eye, it will cause its resistance to change.

When designing the light control circuit, the missing key spring uses the light of an incandescent bulb (small electric bead) or natural light as the control light source, which greatly simplifies the design.