Senba Sensing Technology Co., Ltd.

  What is LDR  Sensor ? Ldr sensor is a special resistor made of semiconductor materials such as sulfide or selenide barrier. It is also coated with moisture-proof resin and has photoconductive effect.   Characteristics of LDR Photocell Ldr sensor is very sensitive to light. The stronger the light, the lower the resistance. With the increase of illumination intensity, the resistance value decreases rapidly, which can be reduced to less than 1KΩ.   Working Principle of LDR Photocell The working principle of ldr photoresistor is based on the internal photoelectric effect, that is, the semiconductor photosensitive material is encapsulated in the shell with transparent window by installing electrode leads at both ends to form an ldr sensor. In order to increase sensitivity, the two electrodes are usually in the comb shape.   Application of LDR photocell 1. The ldr photocell module is most sensitive to the ambient light intensity, which is generally used to detect th...

  Digital pir obstacle avoidance sensor is a digital input module, which is also called proximity switch, infrared switch and photoelectric switch.   Question: Is the digital pir obstacle avoidance sensor a digital pir sensor chip   or an analog pir sensor?   Answer: This is a  digital pir  group , and the switch is the NPN photoelectric switch which is  normally open; the output state is 0,1, that is, the low level and high level in the digital circuit, and output is in the high level at the normal state, detecting the low level of the target output.   Question: Can you connect it to the IO port of the single pir sensor chip  computer? Answer: It can be directly connected to the IO port of MCU.   Question: What is the value of the pull resistance added? Answer: Plus the resistance value of the pull resistance, the resitstance value is generally about 10K.   Question: Why is the light always on when the power is connected?   An...

  Optical Coupler (opticalcoupler, and English abbreviation is OC) is also known as optical isolator or optocoupler, and it is shortly called the optocoupler sensor . It is a device that transmits electrical signals through light. Usually, the luminescent device (infrared light emitting diode LED) and the photoreceptor (photosensitive semiconductor tube) are encapsulated in the same shell. When the input end adds electric signal, the light emitting diode emits light. After receiving light, the phototransistor generates photocurrent, which flows out from the output end, thus realizing the "electro-opto-electric" conversion. The sensor optocoupler , which couples the input signal to the output signal through the medium of light, is widely used in digital circuits because of its small size, long life, no contacting point, strong anti-interference ability, insulation between output and input, and unidirectional transmission of signals.   The main advantages of LDR  optocouple...

  LDR sensor (photoresistor light-dependent resistor, and the latter is abbreviated as ldr) or photoconductor, is commonly made of cadmium sulfide, as well as selenium, aluminium sulfide, lead sulfide and bismuth sulfide. These fabricated materials have the characteristics of rapid reduction of resistance under the irradiation of specific wavelength light. This is because the carriers generated by light are all involved in conduction, and it will cause drift under the action of an applied electric field, and electrons run to the positive pole of the power supply, and holes run to the negative pole of the power supply, so that the resistance value of the photoresistor sensor decreases rapidly.   Usually, many types of LDR  sensor   are  made into thin sheet structures to absorb more light energy. When it is irradiated by light, the electron-hole pairs are stimulated in the semiconductor sheet (photosensitive layer) to participate in conduction, which enhances the...

  Intelligent lighting solutions   The role of lighting in every family is self-evident. Regardless of the family, leaving the lighting, it is like returning to the ancient times hundreds of years ago, which brought a lot of inconvenience to our lives. It is undoubtedly a terrible thing for modern people to leave the life of lighting. Therefore, many scholars have defined the invention of incandescent lamps as one of the symbols of modern civilization. With the invention of incandescent lamps, Senba  produces various lighting devices for thousands of households.   Thus, a pir lighting system  has been formed in each family. Later, due to the use of various lamps, there was a certain change in the light and shade of the light. However, because it adopts the traditional local style, the control method of opening and closing, it restricts the fast-paced lifestyle of modern people, and also limits its application in modern homes.   With the development of scien...

  As a china sensor manufacturer , we provide home appliance solutions   Smart homes have flourished around the world and have become the mainstream of development in the 21st century. Smart home pir  is a product of modern building technology, modern communication technology, modern control technology, modern instrumentation technology and modern computer technology. In recent years, with the rapid development of computer network communication technology and the improvement of people's living environment requirements, the concept of "intelligence" has also been introduced into the construction of housing. " Sensor Technology for Smart Homes " now brings a lot of delusions to the industry.   Smart home pir sensor  is based on housing, as long as they are residential, hotels, office buildings, enterprises, factories, schools, etc., are our target markets.       The term smart home seems to be far away from our lives, just a performance in high-tech...