Strategies: Arduino tutorial – ultrasonic sensor hc-sr04 with buzzer and led (distance meter ) | Best choice

  • Philips Hue Indoor Motion Sensor for Smart Lights (Requires Hue Hub, Installation-Free, Smart Home, Exclusively for Philips Hue Smart Bulbs)
    The Philips Hue Smart Motion Sensor combines convenience and energy effeciency. Have your lights turn on when you walk into a room, and off when you leave. The Smart sensor detects optimum daylight levels to conserve energy during the day During the night the Philips Hue Motion Sensor will switch to smart night light settings: a gentle, warm light setting to help you navigate during the night without disturbing your rest The Philips Hue Motion Sensor can be placed freely for an optimal detection area, or mounted to a wall using screws (included). The device is battery powered, wireless and installation free (no re-wiring required) to control your lights without hassle Place anywhere in your home including your hallway, bathroom, kitchen, and more. The integrated light sensor saves energy by detecting when rooms are vacant and automatically turning off lights Installed in a minute. Simply follow the instructions in the Philips Hue app. Our smart lights default settings get you going, or personalize these settings to fit your needs The Philips Hue motion sensor requires a Philips Hue bridge to make it part of your smart home lighting system. The Philips Hue system can control up to 50 smart lights When you use the Philips Hue motion sensor with a Philips Hue bridge, you can use it to control any HomeKit compatible appliance
  • ELEGOO Upgraded 37 in 1 Sensor Modules Kit with Tutorial Compatible with Arduino IDE UNO R3 MEGA2560 Nano
    Updated from the old version (others): Received great ideas from our customers and adopted in this upgraded kit. Removed useless modules like light cup and mercury module, heartbeat sensor, two of the hall sensors, one of the dual-color sensor. Add useful modules like GY-521 accelerometer module, LCD1602 screen, DS1307 real time clock module etc. Upgraded tutorial only for R3, MEGA2560 R3, NANO in CD, listing paper, resistors pack only from Elegoo Team. There are tutorials in the CD that comes with. If you prefer download the tutorials online from the official website 100% compatible with Arduino official IDE, Raspberry Pi and STM32. Note: To use Elegoo starter kits requires basic electronic knowledge. If the user has no experience, it would be better to have someone lead and teach them while studying.
  • Zircon Leak Alert WiFi - Smart Electronic Water Detector Alarm with Email, Audio and Visual Alerts - Battery Included
    The Leak Alert WiFi smart water detector connects to Wi-Fi and immediately sends email alerts when even the slightest amount of moisture is detected Name each wifi water sensor with its location during set up and email alerts will direct you immediately to the source of the alarm! Loud 105 dB alarm and flashing SOS alert even when Wi-Fi isn't available Independent and hubless system allows an unlimited number of Leak Alert WiFi water detectors to be set up and running at any given time. Perfect for homes, schools, offices, hotels, property management, and more Continuously monitors for leaks around sinks, dishwashers, appliances, refrigerators, washing machines, sump pumps, water heaters, hot tubs, water filtration units, and more Fully automatic battery-powered operation - no wiring required for this smart water sensor. Like your smoke and carbon monoxide detectors, a low battery warning chirps an alarm when it is time to replace the 3V Lithium battery.Alarm sounds for upto 8 hours
  • DIGITEN LCD Digital 0-99999 Counter 5 Digit Plus UP Gauge + Proximity Switch Sensor with Magnetic
    12.49 $
  • SunFounder Raspberry Pi Car Robot Kit, 4WD HAT Module, Ultrasonic Sensor, Velocity Measurement Module etc. Electronic DIY Robot Kit for Teens and Adults, Raspberry Pi/TF Card/Battery not Included
    【STEAM ROBOTICS CAR KITS】An educational STEAM Raspberry Pi developmental smart car kit for beginners (12+ Teens) to learn Raspberry Pi programming, electronics assembling and robotics knowledge. It is an integration solution for building your own remote control car and learning and made for education, can truly realize knowledge into practice.(Raspberry Pi is not included) 【PROGRAMMING LANGUAGES & VARIOUS Modules】The Raspberry Pi robot be programmed by Python language. It comes with four sensor modules including 4WD HAT Module, Velocity Measurement Module, 3-ch Grayscale Sensor Module, and 3.3V Ultrasonic Module" 【MULTIPLE FUNCTIONS】The Multifunctional SunFounder 4WD Smart Car supports multiple functions: Obstacle Avoidance; Line Following; Object Following; Cliff Detection; Velocity Measurement; Mileage Calculation; Radar Sampling. In addition, It has 4 powerful motors, creat more power than SunFounder PicarV and PicarS. 【WEB CONTROL】The Raspberry Pi Car can be controlled by Android and iOS Mobile to get web remote control, only need your phone can connect the Internet. 【FRIENDLY DESIGN】It comes with user manual, includig a operational examples of web terminal, also provide the original python code for in-depth learning. (💟Note: Raspberry Pi/TF card/battery not included in the package, u need to purchase separately!!!))
    69.59 $ 84.99 $ -18%
  • HiLetgo 10pcs IR Infrared Obstacle Avoidance Sensor Module for Arduino Smart Car Robot 3-Wire Reflective Photoelectric for Arduino Smart Car Robot
    Can be widely used in robot obstacle avoidance, obstacle avoidance car, line count, and black and white line tracking and so on. The effective distance range of 2 ~ 30cm, the working voltage of 3.3V- 5V
    7.99 $
  • 5Pcs Ultrasonic Sensor Module Kit HC-SR04 Distance Sensor with 3pcs Mounting Bracket Compatible with Arduino UNO Mega R3 Mega2560 Duemilanove Nano Rapsberry Pi 3 Robot XBee ZigBee
    Quality -- Power Supply : 5V DC ; Quiescent Current : <2mA ; Effectual Angle: <15 degree ; Detection Distance : 2cm~450 cm ; Resolution : 0.3 cm. Operating Principle -- Ultrasonic hc-sr04 distance measuring transducer sensor, it consists of ultrasonic transmitter, receiver, and control circuit. HC-SR04 ultrasonic sensor module -- Using IO trigger for at least 10us high level signal, when triggered it sends out a series of 40KHz ultrasonic pulses and receives echo from an object, the duration of the signal is the time from sending ultrasonic to returning. Test Distance Formula -- The distance between the unit and the object is calculated by measuring the traveling time of sound and output it as the width of a TTL pulse,hc-sr04 test distance following formula -- L = 1/2 × T × C ( L is the distance, T is the time between the emission and reception, and C is the sonic speed ) Package Include -- 5 X HC-SR04 Ultrasonic Sensors , 10 X Female-Male Dupont Cables , 10 X Female-Female Dupont Cables
    9.49 $
  • Huepar Laser Distance Meter 393Ft with Li-ion Battery & Electric Angle Sensor, Backlit LCD Laser Measure M/In/Ft with High Accuracy Multi-Measurement Modes, Pythagorean, Distance, Area&Volume-LM120A
    ✔️BUILT-IN LI-ION BATTERY & ELECTRIC ANGULAR SENSOR: Powered by a large-capacity Li-ion battery, Huepar laser measure offers remarkable runtime for all-day jobs and can work up to 8000 times when fully charged. There is no need to replace the battery frequently making your work more efficiently. Equipped with electronic angular sensor, laser distance meter delivers higher accuracy and faster angle measurements compared to bubble level meters. ✔️MULTIPLE MEASUREMENT MODES: This laser distance measure delivers angle, area, distance, volume, Pythagorean measurement modes. Featuring continuous measurement, addition and subtraction, calibration, automatic calculation of area and &volume and 30 groups data memory function, it is ideal for home and construction or industries applications. ✔️HIGH ACCURACY & UNIT SWITCHABLE: Huepar distance measure features long-range measuring with extreme accuracy and can measures distances up to 393-feet within 1/16-inch. The tool can measure from front/middle/rear reference points making it easy to measure in different scenarios. All measurements are displayed in real time and can be switchable among M/In/Ft freely. ✔️BACKLIT LCD AND MUTE SETTING: Large backlight screen provides users with a better visibility in low-light or no-light working conditions. Automatic shutdown without operation 150s.Mute setting allows users to adjust the volume freely which is suitable for using in library, classroom and other quiet places. ✔️DURABLE ROBUST DESIGN: Huepar laser distance measure is IP54 rated to withstand tough working environments. It features small dimensions and a handy pocket-size design so this laser measure can fit in any pocket. 1/4" inch threaded mount enables it to be attached to tripod or other tools for use. Package Contents: 1 x Laser Distance Meter, 1 x User Manual, 1 x Hand Strap, 1 x USB cable
    46.99 $
  • Gowoops 2 pcs DHT22 Temperature Humidity Sensor Module for Arduino Raspberry Pi | Digital Measure DHT Sensors
    The sensor can be operated with both 3.3V and 5V, it is suitable for connection to all standard boards such as Arduino, RN-Control, Raspberry Pi and all other microcontrollers. This sensor can build thermometer electric circuit microcontroller, it can be used for robotics development kit, suit for engineer to make projects. Suit for School Beginners: Perfect intro sensor to programmable Arduino electronic and IoT robotics. Used for automatic control, weather stations, home appliances, humidity regulators, medical treatment, dehumidifiers, etc.
    11.98 $
  • GE, White, Wireless Motion-Sensing Control Transmitter with 1 Grounded Outlet Receiver, 30ft. Detection Range, Off after 10 Mins, for Lamps and Other Indoor Lighting, 12751, Sensor Switch
    Automatically turn lights ON when motion is detected and OFF after 10 minutes of no motion. Ideal for plug-in lamps and lighting in hallways, laundry rooms, entrance ways, and more. Receiver has 1 grounded outlet and plugs into any standard household outlet – up to 100ft. range from motion sensor. Motion Sensor has 30ft motion detection range and is battery powered – 3 AAA Batteries (Included) Electrical Ratings – 12A, 120VAC, 60HZ, 360W Max Tungsten, 1440W Max Resistive, UL Listed
    23.91 $

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