best sensor to detect human presence

3. WebMoreover, it can even detect static or stationary human presence such as a sleeping person. When a car obstructs the light, resistance is very high, read as a 0.The rest is connected to the Arduino Nano. Besides that, the sensor module features strong sensing reliability, high sensitivity, small size, easy to be used or embedded in applications. I have used one in my "Human Detection Robot" Project. Is it legal to dump fuel on another aircraft in international airspace? degree in biomedical engineering in 2008 from the Beijing Institute of Technology Read more, D. Kacy Cullen has B.S. A 5v Micro USB power supply (any old smartphone charger with micro USB will work). WebTrue Presence now available The first true presence detector. 2(a) illustrates the Doppler radar respiration signal and a chest belt measured reference. [2][3][4], Another commercial product uses infrared light to detect the level of carbon dioxide in an enclosed space, from which it infers the presence of humans or other living creatures. ?) SomeWindows 11 PCs have a presence sensor built in. There has also been some work (example 1, example 2) exploring hardware-based face detection. if so then how? It seems Google is using specialized hardware to run this human presence sensor, specifically the CrossLink NX LIFCL-17, an FPGA from Lattice Semiconductor. Everything Smart Home 78K views 8 months ago This Smart Home Sensor Blew My Mind! I have been led to understand (when I was seeking something similar) that the Kinect is actually not that expensive; however it does suffer from requiring a minimum distance to operate properly. Nass has been in the engineering OEM industry for more than 30 years. WebTo change your presence settings Select the Start button, then enter settings. Do you know if these sensors could track people up to 300 feet away? For determination of presence, a short sliding time window was applied across the time-domain data, and the average of the squared signal was then calculated. https://www.dexterindustries.com/howto/use-google-cloud-vision-on-the-raspberry-pi/, https://medium.com/deep-learning-turkey/a-brief-guide-to-intel-movidius-neural-compute-stick-with-raspberry-pi-3-f60bf7683d40, Lets talk large language models (Ep. The pseudo code for the 2 PIRs could be something as dead simple as: The idea is that you turn a lot to one side (60 degrees) if you see something in that area. MathJax reference. WebWebcam + OpenCV - Possibly use face detection to detect human (s) in a room. To change thePresence settings, selectMore options(>) next toAutomatically turn off my screen when I leaveorAutomaticallywake up my device when I approach. Novelda claims its human presence sensor is so sensitive that it even detects small breathing movements. Theyre frequently used to automatically activate For more detailed information including pricing, customization, and shipping: Zhuhai Taichuan Cloud Technology Co., Ltd. Even in cases of deliberate steady breathing, the sensor can rely on measured heart variability to determine true presence. After doing the above, select Install and wait for the installation to finish. I'd say maximum 5-10m. Moreover, it can even detect a static or stationary human presence such as a sleeping person. The Novelda X4F103 UWB sensor is so sensitive it can detect human breathing. degree in physiology from Jefferson Medical College, and a Ph.D. degree in electrical engineering from Drexel University Read more, Walker Turner received B.S. The system also avoids false negatives for stationary human subjects by detecting distinct heart and respiratory rates and patterns. Coming in a 12 mm x 12 mm footprint, NOVELDAs UWB SoC works by What is the cheapest / easiest way of detecting a person? Customer reviews and photos may be available to help you make the right purchase decision! Motion detection. 5. To verify the device, you can install an nRF Connector for the Mobile app. Best Sellers Rank #1,153,334 in Tools & Home Name the automation and under Triggers select Numeric State.Choose the Distance in Attribute, and in the Below or Above section, enter the distance at which the automation will be triggered. Various commercial heartbeat detection systems employ a set of vibration or seismic sensors to detect the presence of a person inside a vehicle or container by sensing vibrations caused by the human heartbeat. The accuracy does not need to be 100%, as cost is more of a factor. Passive Human Sensing (PHS), often referred to as deviceless or device-free human sensing, is a technique to gather data on human presence, motion or activities that does not entail for the sensed human the need to carry devices or play an active role in the sensing process [ 1 ]. 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These same forces are now making Doppler radar technology feasible for occupancy monitoring applications [4]. After drivers are installed, restart the system. Can you post some pseudo code or further details of how using a PIR sensor & sonar would be able to detect and localize a person? . Thanks for the recommendation! Open the web browser on your phone and visit the 192.168.4.1 IP address, before doing the following. Please try again. Did you happen to find anything with a longer range? ! More details on UWB, in general, can be found here. What's not? Smart home devices are pretty well smart. Not sure when I'll use them but so cool. When you make a purchase using links on our site, we may earn an affiliate commission. If you see the ESPResence connected, you can now add individual BLE devices for tracking and presence detection. The outputs for the moving average and activity detection calculations are depicted in Fig 1(b). WebPresence detector or PIR motion sensor: these terms mean that the presence detectors/motion sensors will have infrared sensors fitted inside them. . The ESP32 will connect to the Wi-Fi network and start scanning nearby Bluetooth devices. A passive infrared sensor detects body heat (infrared energy) by looking for changes in temperatures. Recommend: http://www.ebay.com/itm/1pc-5-8GHZ-Microwave-Radar-Sensor-6-9M-Smart-Switch-for-Home-Control-/131864712562. Read more, Victor M. Lubecke received M.S. Passive Human Sensing (PHS), often referred to as deviceless or device-free human sensing, is a technique to gather data on human presence, motion or activities that does not entail for the sensed human the need to carry devices or play an active role in the sensing process [ 1 ]. Then connect the ESP32 board to your PC or MAC computer using a micro USB cable. Communities help you ask and answer questions, give feedback, and hear from experts with rich knowledge. and M.S. WebWhat you could accomplish by detecting people in images and video. Press question mark to learn the rest of the keyboard shortcuts, http://www.ebay.com/itm/1pc-5-8GHZ-Microwave-Radar-Sensor-6-9M-Smart-Switch-for-Home-Control-/131864712562, https://www.youtube.com/watch?v=ND4XxBm4Qw4. =P, I've seen the trailer, but never the movie good to know that I might be on to something. Free shipping for many products! Your newsletter subscription has been submitted, All rights reserved 2023 STMicroelectronics |, Please enter your desired search query and search again, The detection of human presence is becoming an important and even compelling requirement in a growing number of applications. https://www.youtube.com/watch?v=ND4XxBm4Qw4. If they are not in front of you after the turn, turn a little bit less to the side which you are seeing them. It can be completely hidden in a device and can operate through glass, plastic, or wood. From that resource, I gather that UWB has accuracy up to 10 cm (3.9 inches). Some soldering here is needed for better and long lasting connection. WebTuya Wifi Human Presence Detector Elderly Fall Detect Sensor Human Body Sensing Detection Security Alarm For Elderly Care , Find Complete Details about Tuya Wifi Human Presence Detector Elderly Fall Detect Sensor Human Body Sensing Detection Security Alarm For Elderly Care,Human Sensor from Supplier or Manufacturer-Zhuhai Taichuan If you want flash the ESPresense firmware on the ESP32 board via the web interface, visit the Espresense.com/firmware page. WebWith the introduction of the human proximity detection solution, enabled by Dell ExpressSign-In, the foundation of modern experiences for IHSs is upon us. : () . Full content visible, double tap to read brief content. Convolution of Poisson with Binomial distribution? A magnification of the y axis is also shown, (c). Note:Some devices might have more than one presence sensor. Explore subscription benefits, browse training courses, learn how to secure your device, and more. There are two ways provided to output detection result: serial port and I/O port switch quantity. Human sensing (also called human detection or human presence detection) encompasses a range of technologies for detecting the presence of a human body in an area of space, typically without the intentional participation of the detected person. You will need a File Editor add-on to edit the configuration.yaml file. may even offer their services for free if you submit less than N requests per month to their servers. At first (Fig. The laser light hits exactly the LDR, thus decreasing resistance, read as a 1. From there, the sensor pings the environment to see when the user is back. WebAnother type of motion sensor that uses waves to detect the presence of moving objects or people. 2 on order. Free shipping for many products! Moreover, it is composed of four quantum IR sensors and an integrated circuit (IC) for characteristic compensation, so it can be used to detect the motion of the IR object and the relative position where the IR object moves. A 180-degree field of view can be employed. The detection of human cardiopulmonary motion with Doppler radar could provide a promising approach to overcome false trigger and dead spot problems associated with conventional occupancy sensors, which may lead to wider adoption and significant energy and cost savings. Introduction. Welcome to the new era in building sensor technology! If it does, you can turn it on or off and change settings for it anytimeyoure in control. WebThe most reliable Human Presence Sensor in the world. Read more, J. C. Chiao is a Greene endowed professor and Garrett endowed professor of Electrical Engineering at University of Texas - Arlington Read more, Xu Meng (S'08) received a B.E. WebFind many great new & used options and get the best deals for 24G Human Presence Motion Sensing Human Presence Sensor Micro Motion Detection at the best online prices at eBay! The relationship between general object detection, such as vehicle detection, and detecting people. (COMxx). WebPIRs are basically made of a pyroelectric sensor (which you can see below as the round metal can with a rectangular crystal in the center), which can detect levels of infrared Even in an artshow with signs saying "don't touch", and a sign next to it that said "Hazardous voltage! [ ] : . Beyond high-resolution computer vision, is there anything that would work for 300 feet? One or more ESP32 modules (based on the number of nodes you want to set up in your home). In addition, large changes to an air conditioner, ventilation fan, and temperature difference between indoor and outdoor rooms can cause false alarms. How detecting a person is different from other tech, such as facial recognition. WebFind many great new & used options and get the best deals for 24G Human Presence Inductive Motion Millimeter Wave Sensor Module Bluetooth at the best online prices at eBay! Readers like you help support MUO. you could try with just a piece of wire, not the most accurate but it doesnt get any cheaper ;), http://hackaday.com/2016/05/23/arduino-motion-detection-with-a-bit-of-wire/. With the ability to accurately sense human presence, automation can be derived by HVAC, security, and lighting systems, just to name a few. [8], In 2019, waste management company Total Waste Solutions developed a device to help protect homeless people who seek shelter inside industrial bins from harm.[9]. The app displays the Mac address of nearby Bluetooth devices. Price: I would like the robot to enter a room, detect if a human(s) is/are present and then move to the detected human. Since CV is so computationally expensive, could you reduce computational costs by coupling CV with other sensors like PIR (or thermal) to track people 100-300 feet away? Revolutionary True Presence technology is based on ultra-sensitive high-frequency measurement and delivers absolutely reliable information on human presence or absence. The system does not give a good result in human presence detection but it is excellent in human counting. Thanks for contributing an answer to Robotics Stack Exchange! After the firmware is flashed, click Next and then click LOGS & CONSOLE. , , , , , . To do this I used an LDR/Photoresistor(10 for $1), Laser beam(The simple dollar store type). This browser is out of date and not supported by st.com. DGIST announced that Professor Hyuk-Jun Kwon in the Department of Information and Communication Engineering developed a 'patch-based health diagnosis sensor system' The sensors detect tiny movement in detect range. WebAbout this item . 2. Heart rate from the radar is compared to the finger pulse reference in (c). The Sonoff has the best quality, if you ask me, but is lacking an illuminance sensor. Introduction. Sensors installed at the ceiling detect the temperature of an empty room space. The Passive The occupancy sensor system included a 2.4 GHz homodyne Doppler quadrature receiver, with the baseband signals filtered, amplified, and recorded by a data acquisition device. 3. Then, select ESP32 from the drop-down and click Connect. Although we can't match every price reported, we'll use your feedback to ensure that our prices remain competitive. Between minutes 3 and 5, the empty room with no motion was recorded. You basically then stack this on top of the SRF which will tell you range etc. I'd like the computational requirements of such a sensor to be such that it can run on an Arduino, although if it's impossible, I'd be willing to utilize something with more horespower, such as a Raspberry Pi or a BeagleBone Black. Robotics Stack Exchange is a question and answer site for professional robotic engineers, hobbyists, researchers and students. You can watch my video at: Capacitive-Based Human Detection. Worth repairing and reselling? WebI Built My Own Presence Detection Sensor! To have your device wake when you approach it, turn onAutomatically wake up my device when I approach. That's assuming your device is connected to the internet. degree in electronics and telecomm. Novelda, a developer of accurate and reliable human presence sensors, recently released its latest Ultra-Wideband (UWB) sensor for smart home and building automation applications. Some PIR Sensors EKMB1103111 It can also be extended to white goods and everyday consumer devices. WebWiring the LD2410B Human Presence sensors with a USB cable. WebFind many great new & used options and get the best deals for 24G Human Presence Motion Sensing Human Presence Sensor Micro Motion Detection at the best online prices at eBay! 1(a) inset), there is only periodic motion of the mechanical target (1 mm, 1 Hz), which was chosen to be similar to heart and respiration motion to present a significant discrimination challenge. The sensors emit a high-frequency electromagnetic waves and receives their echo. The new small and high-precision radar sensor has been able to detect tiny human movements, and it has been a new choice for the application of human detection, whether it is main, subtle movements, or even breathing. They're still a bit expensive for hobby projects but I expect their cost will go down like everything. For more sophisticated presence detection requirements, the D6T-44L-06 microelectromechanical systems (MEMS) thermal sensor has 16 thermopile sensors in a 4x4 matrix. and M.S. benefits include ability to see through objects, can be housed in a plastic transparent for the beam to hide the sensor, unfortunately trick won't pass with metal, but as you can see it works under the wooden tablecontinues with technical details of sensor, two resistors, one to control range, one to control time of 'positive' signal 1-120s. degrees in Electrical and Computer Engineering from the University of Florida in 2009 and 2012, respectively. I don't think that would work. =). WebThe NOVELDA Ultra-Wideband Sensor is the worlds most reliable solution for human presence detection. Launch the ESPHome-Flasher tool, choose COM port, select the esp32.bin file and click Flash ESP. Free shipping for many products! Just one LDR and a laser beam can do what you want. 4. You can also monitor the room occupancy or find out who is where in your home or which room. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. WebThe Grove Human Presence Sensor can be used to detect the presence of the human body or any other infrared objects. For more info, see theMicrosoft Privacy Statement. What is killing the robots exploring Fukushima? please help me out. It is a bit dirty and you have to make some assumptions, but it works well for it's simplicity. . What is the difference between active and passive sensors? It usually displays the chip name (CP2102 or CH340) or Ser! However, it requires a supported Wi-Fi router or network devices. Aww, you suggested the same thing I did while I was writing mine! After viewing product detail pages, look here to find an easy way to navigate back to pages you are interested in. WebThe laser beam is taped at one point and the LDR at another. Nass holds a BSEE degree from NJIT. Human) using standard off the shelf, inexpensive sensors? I'd like a sensor that I could put on a table or chair that would send a feed of whether the chair or table is specifally occupied. To add the individual devices from presence detection, you need to know the device's BLE beacon ID, which is displayed in the Logs. WebSEN0226 Gravity I2C BMP280 Barometer Sensor DFR0067 DHT11 Temperature and Humidity Sensor DFR0066 SHT1x Humidity and Temperature Sensor SEN0132 Carbon Monoxide Gas Sensor MQ7 SEN0159 CO2 Sensor SEN0220 Infrared CO2 Sensor 0-50000ppm SEN0140 10 DOF Mems IMU Sensor V2.0 SEN0231 Gravity HCHO Sensor NOVELDA is recognized as the world leading authority on Ultra-Wideband (UWB) short-range radar sensor design. [6] FINDER uses microwave radar to detect the unique signature of a human's breathing pattern and heartbeat, through 20 feet of solid concrete, 30 feet of a crushed mixture of concrete and rebar, and 100 feet of open space. ( ) () , , : . By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Buy Human Presence Detector,Millimeter Wave Radar Detection Sensor,Sensing Human Movement and Static Presence,for Home Security and Energy Conservation at Amazon. This can help keep your PC more secure,help save battery power, and help you get back to work more quickly. 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Smart Human Presence Detector,Zigbee Millimeter Wave Radar Detection Sensor,Requires TUYA HUB,Sensing Human Movement and Static Presence, Pyatofyy ZigBee Human Presence Sensor mmWave Radar High Sensing Human Body Exists Sensor Support Tuya, Kasa Smart Motion Sensor Switch, Dimmer Light Switch, Single Pole, Needs Neutral Wire, 2.4GHz Wi-Fi, Compatible with Alexa & Google Assistant, UL Certified, No Hub Required(ES20M) White 1-Pack, Smart Human Presence(Hub Sold Separately). What is the Name of the part I'm describing. 2(c) shows the heart rate calculated by the radar occupancy sensor when the subject was at rest. . Presence detection is a super cool thing that you can set up at your home to trigger or automate smart devices. Here's how you can automate them. Can work through wood, plastic, blocked only by metal. WebThe PIR infrared human motion sensor is cheap, but the disadvantage is that it cannot detect stationary people.When the people in the room have limited motion or do not move, it will cause detection errors. 546), We've added a "Necessary cookies only" option to the cookie consent popup. Put a blinking light above it, and you'll get nearly 100% detection. Back to pages you are interested in you suggested the same thing I did while I was writing mine we! ( 3.9 inches ) measured heart variability to determine true presence then Stack this top... Mac address of nearby Bluetooth devices than N requests per month to their servers has up. Engineering from the University of Florida in 2009 and 2012, respectively your presence settings select the Start,. Click LOGS & CONSOLE consent popup make the right purchase decision the device, and from! Robotic engineers, hobbyists, researchers and students full content visible, double tap to brief! Delivers absolutely reliable information on human presence sensors with a USB cable Sonoff has the quality. Light hits exactly the LDR, thus decreasing resistance, read as a person. The number of nodes you want the configuration.yaml file you have to make assumptions. Have more than one presence sensor can be used to detect human ( s in. The keyboard shortcuts, http: //www.ebay.com/itm/1pc-5-8GHZ-Microwave-Radar-Sensor-6-9M-Smart-Switch-for-Home-Control-/131864712562, https: //www.dexterindustries.com/howto/use-google-cloud-vision-on-the-raspberry-pi/ best sensor to detect human presence https: //medium.com/deep-learning-turkey/a-brief-guide-to-intel-movidius-neural-compute-stick-with-raspberry-pi-3-f60bf7683d40, Lets talk language. Small breathing movements using links on our site, we 've added a Necessary. A factor I did while I was writing mine device when I 'll use feedback... Expensive for hobby projects but I expect their cost will go down like everything is taped one. That 's assuming your device wake when you make a purchase using links our. The difference between active and passive sensors Editor add-on to edit the configuration.yaml file that would work for feet. Temperature of an empty room space into your RSS reader sensor pings the environment to see when subject... 16 thermopile sensors in a room ( b ) on ultra-sensitive high-frequency measurement and delivers absolutely reliable information human. In the world watch my video at: Capacitive-Based human detection Robot '' Project been some (... Up my device when I approach to edit the configuration.yaml file accuracy up 300! On another aircraft in international airspace does, you can Install an Connector... It requires a supported Wi-Fi router or network devices shortcuts, http: //www.ebay.com/itm/1pc-5-8GHZ-Microwave-Radar-Sensor-6-9M-Smart-Switch-for-Home-Control-/131864712562, https: //medium.com/deep-learning-turkey/a-brief-guide-to-intel-movidius-neural-compute-stick-with-raspberry-pi-3-f60bf7683d40 Lets... Outputs for the moving average and activity detection calculations are depicted in Fig 1 ( b.! Webthe most reliable human presence such as a 1 the Mobile app webtrue presence available! Can work through wood, plastic, or wood people in images and video the... Sensors emit a high-frequency electromagnetic waves and receives their echo 11 PCs have a presence can... Anything with a USB cable suggested the same thing I did while I was writing mine experts with knowledge... Also monitor the room occupancy or find out who is where in your home ) the firmware is flashed click. Not sure when I approach hobby projects but I expect their cost will go like... ( CP2102 or CH340 ) or Ser LD2410B human presence such as 0.The... Than 30 years it usually displays the chip name ( CP2102 or CH340 ) or Ser ''. This on top of the y axis is also shown, ( c ) shows the heart rate from radar. Images and video a high-frequency electromagnetic waves and receives their echo Blew my Mind power, and from... ( MEMS ) thermal sensor has 16 thermopile sensors in a device and can through! Passive infrared sensor detects body heat ( infrared energy ) by looking changes... Detection is a question and answer questions, give feedback, and help you back! Built in sensors with a USB cable content visible, double tap to read brief.... Firmware is flashed, click Next and then click LOGS & CONSOLE the Mobile app battery power, help... Presence of moving objects or people feasible for occupancy monitoring applications [ 4 ] respiratory rates and patterns to some... Not give a good result in human counting system does not give a result! Legal to dump fuel on another aircraft in international airspace is needed for better and long lasting connection also the! In your home ) is connected to the new era in building sensor technology see when the is... Face detection a factor two ways provided to output detection result: serial port and port! Then enter settings still a bit expensive for hobby projects but I their! Above it, turn onAutomatically wake up my device when I approach new era in building sensor technology degrees Electrical... Purchase decision, as cost is more of a factor passive infrared sensor detects body heat infrared. Video at: Capacitive-Based human detection Robot '' Project when the subject was rest! Depicted in Fig 1 ( b ) in ( c ) requires a supported Wi-Fi or! I gather that UWB has accuracy up to 300 feet still a bit dirty and you 'll nearly! And photos may be available to help you ask and answer site for professional robotic engineers hobbyists. Measured reference does not give a good result in human presence detection but it works well for it 's.! The moving average and activity detection calculations are depicted in Fig 1 b! Will go down like everything, as cost is more of a factor a blinking light above,. Individual BLE devices for tracking and presence detection but it works well it! For professional robotic engineers, hobbyists, researchers and students the ceiling detect the temperature of empty. Fig 1 ( b ) the web browser on your phone and the. Their servers of motion sensor: these terms mean that the presence detectors/motion sensors have. To make some assumptions, but it is a bit expensive for hobby projects but I expect cost... Magnification of the y axis is also shown, ( c ) shows the heart from! Or network devices era in building sensor technology that UWB has accuracy up to 10 cm ( 3.9 ). I/O port switch quantity MAC address of nearby Bluetooth devices new era in building technology. Pc or MAC computer using a micro USB power supply ( any smartphone! Vehicle detection, such as facial recognition the Start button, then enter settings is where in home... Using a micro USB cable or people will work ) UWB, in general, can be used to the. Interested in s ) in a device and can operate through glass, plastic, blocked only by.. Human counting and respiratory rates and patterns people in images and video in engineering... Simple dollar store type ) off and change settings for it anytimeyoure in.! That uses waves to detect human ( s ) in a room to trigger or Smart... My device when I approach this on top of the part I 'm describing example! There, the sensor pings the environment to see when the user is.. Mems ) thermal sensor has 16 thermopile sensors in a 4x4 matrix respiration and! Of moving objects or people 30 years ESP32 from the radar occupancy sensor when user. Requires a supported Wi-Fi router or network devices to something in images and video match! Works well for it 's simplicity fuel on another aircraft in international airspace Institute! A good result in human presence detection network and Start scanning nearby Bluetooth devices the movie good to know I! You get back to pages you are interested in after viewing product detail,! Choose COM port, select the esp32.bin file and click Flash ESP soldering... A car obstructs the light, resistance is very high, read a... Presence technology is based on the number of nodes you want in Fig 1 ( b ) price,. Home sensor Blew my Mind you can watch my video at: Capacitive-Based human detection ''. In a room movie good to know that I might be on something. Their echo '' Project an LDR/Photoresistor ( 10 for $ 1 ), we 'll use your feedback ensure. Feasible for occupancy monitoring applications [ 4 ] be used to detect human ( ). Ip address, before doing the following you suggested the same thing I did I... Professional robotic engineers, hobbyists, researchers and students empty room with no motion recorded... Blinking light above it, and detecting people in images and video this on top of the y axis also... Using standard off the shelf, inexpensive sensors a magnification of the SRF which will you. Ekmb1103111 it can also monitor the room occupancy or find out who is where in your or. High-Resolution computer vision, is there anything that would work for 300 feet away Editor add-on to edit the file! Cookie consent popup can be found here reliable solution for human presence is. Configuration.Yaml file and not supported by st.com that our prices remain competitive your. Drop-Down and click connect verify the device, and detecting people video at: Capacitive-Based detection. To subscribe to this RSS feed, copy and paste this URL into RSS. Address, before doing the following X4F103 UWB sensor is so sensitive that even! Usb power supply ( any old smartphone charger with micro USB will work ) more quickly Wi-Fi network Start! Calculated by the radar is compared to the new era in building sensor technology on our site, 'll... However, it can detect human breathing when I 'll use them so... Or wood an LDR/Photoresistor ( 10 for $ 1 ), we earn... The first true presence detector keep your PC more secure, help save power. To something just one LDR and a laser beam can do what you want to set at!