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Flame Sensor (5pcs pack)
Price: $2.17
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Elecrow Item #: EL-SPM21020F -

The flame sensor can be used to detect fire or other wavelength at 760 nm ~ 1100 nm light. In the fire-fighting robot game, the flame plays an important role in the probe, which can be used as the robot's eyes to find fire source or football. It can make use of fire-fighting robots, soccer robots.   The flame sensor's operating temperature is -25 degrees Celsius to 85 degrees Celsius, in the course of the flame it should be noted that the probe distance from the flame should not be too...

Flex Sensor 2.2"
Price: $16.13
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Sparkfun Item #: SEN-10264 -

A simple flex sensor 2.2" in length. As the sensor is flexed, the resistance across the sensor increases. Patented technology by Spectra Symbol - they claim these sensors were used in the original Nintendo Power Glove. I love the Nintendo Power Glove. It's so bad! The resistance of the flex sensor changes when the metal pads are on the outside of the bend (text on inside of bend). Connector is 0.1" spaced and bread board friendly. Check datasheet for full specifications. Note: Please refrain...

Flex Sensor 4.5 inch
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Price: $23.27
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DFRobot Item #: SEN0064 -

A simple flex sensor 4.5" in length. As the sensor is flexed, the resistance across the sensor increases. Patented technology by Spectra Symbol - they claim these sensors were used in the original Nintendo Power Glove. I love the Nintendo Power Glove. It&;#39;s so bad!The resistance of the flex sensor changes when the metal pads are on the outside of the bend (text on inside of bend).Connector is 0.1" spaced and bread board friendly. Check datasheet for full specifications.|Documents|...

Flex Sensor 4.5"
Price: $31.60
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Sparkfun Item #: SEN-08606 -

A simple flex sensor 4.5" in length. As the sensor is flexed, the resistance across the sensor increases. Patented technology by Spectra Symbol - they claim these sensors were used in the original Nintendo Power Glove. I love the Nintendo Power Glove. It's so bad! The resistance of the flex sensor changes when the metal pads are on the outside of the bend (text on inside of bend). Connector is 0.1" spaced and bread board friendly. Check datasheet for full specifications. Documents: Datasheet...

FlexiForce Pressure Sensor - 100lbs.
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Price: $38.88
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Sparkfun Item #: SEN-08685 -

This is a piezoresistive force sensor from Tekscan. The harder you press, the lower the sensor's resistance. Pressing hard, the resistance changes from infinite to ~300k. The sensor itself is thin and flexible, but the resistance does not change while being flexed. Resistance changes only when pressure is applied to the round area at the end of the sensor. Used as a presence sensor (someone standing), weight sensor, pressure sensor (impact testing), etc. The overall length is about 8.5"....

Flexiforce Pressure Sensor - 1lb
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Price: $34.39
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DFRobot Item #: SEN0068 -

This is a piezoresistive force sensor. The harder you press, the lower the sensor's resistance. Pressing lightly, the resistance changes from infinite to ~300k. The sensor itself is thin and flexible, but the resistance does not change while being flexed. Resistance changes only when pressure is applied to the round area at the end of the sensor. Used as a presence sensor (someone standing), weight sensor, pressure sensor (impact testing), etc. The overall length is about 8.5". Sensor comes...

FlexiForce Pressure Sensor - 1lb.
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Price: $38.88
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Sparkfun Item #: SEN-08713 -

This is a piezoresistive force sensor from Tekscan. The harder you press, the lower the sensor's resistance. Pressing lightly, the resistance changes from infinite to ~300k. The sensor itself is thin and flexible, but the resistance does not change while being flexed. Resistance changes only when pressure is applied to the round area at the end of the sensor. Used as a presence sensor (someone standing), weight sensor, pressure sensor (impact testing), etc. The overall length is about 8.5"....

FlexiForce Pressure Sensor - 25lbs (1" area)
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Price: $45.75
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Sparkfun Item #: SEN-11207 -

This is a piezoresistive force sensor from Tekscan. The harder you press, the lower the sensor's resistance. Pressing hard, the resistance changes from infinite to ~50k. The sensor itself is thin and flexible, but the resistance does not change while being flexed. Resistance changes only when pressure is applied to the round area at the end of the sensor. Used as a presence sensor (someone standing), weight sensor, pressure sensor (impact testing), etc. The overall length is about 2.25". The...

FlexiForce Pressure Sensor - 25lbs.
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Price: $40.03
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Sparkfun Item #: SEN-08712 -

This is a piezoresistive force sensor from Tekscan. The harder you press, the lower the sensor's resistance. Pressing hard, the resistance changes from infinite to ~300k. The sensor itself is thin and flexible, but the resistance does not change while being flexed. Resistance changes only when pressure is applied to the round area at the end of the sensor. Used as a presence sensor (someone standing), weight sensor, pressure sensor (impact testing), etc. The overall length is about 8.5"....

FLIR Lepton 2.5 - Thermal Imaging Module
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Price: $406.88
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Sparkfun Item #: SEN-16465 -

The FLIR Lepton® 2.5 - Thermal Imaging Module is a radiometric-capable long wave infrared (LWIR) camera solution that is smaller than a dime, fits inside a smartphone, and is less expensive than traditional IR cameras. With a focal plane array of 80x60 active pixels, this Lepton easily integrates into native mobile-devices and other electronics as an IR sensor or thermal image sensor. The radiometric Lepton captures accurate, calibrated, and non-contact temperature data in every pixel. For...

FLIR Radiometric Lepton Dev Kit V2
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Price: $527.74
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Sparkfun Item #: KIT-15948 -

Do you see what we see? With the FLIR Radiometric Lepton® Dev Kit v2 you will be able to bring FLIR's thermal imaging reliability and power to your Arduino, Raspberry Pi, or any ARM based development tool all in an easy to access breadboard friendly package. This kit includes a breakout as well as the Lepton® 2.5 longwave infrared (LWIR) imager. All you need to do to get this kit set up, simply attach the Lepton® imager module into the provided breakout, connect the headers, and you will be...

Flymaple-A flight controller with 10 DOF IMU
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Price: $118.86
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DFRobot Item #: DFR0188 -

Flymaple is a Quadcopter controller board, based on the Maple Project. The FlyMaple embeds a STM32F103RET6 (ARM Cortex-M3) as it's main MCU. It integrates a 3-Axis accelerometer,a 3-Axis gyroscope,a 3-Axis compass and a barometric pressure sensor. By using the 10 dgrees of freedom IMUs and powerful 72MHz high-performation microcontroller, flymaple is powerful enough to handle a complex algorithm and manage a robot motion system at the same time. The design of flymaple is based on the maple,...

Force Sensitive Resistor - Long
Price: $37.82
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Sparkfun Item #: SEN-09674 -

This very long force sensitive resistor - over 2 feet - has a sensing area of 0.25x24". This FSR from Interlink Electronics will vary its resistance depending on how much pressure is being applied to the sensing area. The harder the force, the lower the resistance. When no pressure is being applied to the FSR its resistance will be larger than 1MΩ. This FSR can sense applied force anywhere in the range of 100g-10kg. Two pins extend from the bottom of the sensor with 0.1" pitch making it bread...

Force Sensitive Resistor - Small
Price: $12.55
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Sparkfun Item #: SEN-09673 -

This is a small force sensitive resistor. It has a 0.16" (4 mm) diameter active sensing area. This FSR from Interlink Electronics will vary its resistance depending on how much pressure is being applied to the sensing area. The harder the force, the lower the resistance. When no pressure is being applied to the FSR, its resistance will be larger than 1MΩ, with full pressure applied the resistance will be 2.5kΩ. Two pins extend from the bottom of the sensor with 0.1" pitch making it bread board...

Force Sensitive Resistor - Square
Price: $19.94
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Sparkfun Item #: SEN-09376 -

This is a force sensitive resistor with a square, 1.75x1.5", sensing area. This FSR will vary its resistance depending on how much pressure is being applied to the sensing area. The harder the force, the lower the resistance. When no pressure is being applied to the FSR its resistance will be larger than 1MΩ. This FSR can sense applied force anywhere in the range of 100g-10kg. Two pins extend from the bottom of the sensor with 0.1" pitch making it bread board friendly. There is a...

Force Sensitive Resistor 0.5"
Price: $12.55
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Sparkfun Item #: SEN-09375 -

This is a force sensitive resistor with a round, 0.5" diameter, sensing area. This FSR will vary its resistance depending on how much pressure is being applied to the sensing area. The harder the force, the lower the resistance. When no pressure is being applied to the FSR its resistance will be larger than 1MΩ. This FSR can sense applied force anywhere in the range of 100g-10kg. Two pins extend from the bottom of the sensor with 0.1" pitch making it bread board friendly. There is a...

G1/4" Water Flow Sensor
Price: $7.52
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Elecrow Item #: EL-SOT80014WF -

    Water flow sensor consists of magnetic core, rotating impeller, external casing and sensor and a hall-effect sensor. When water flows through the rotor, rotor rolls, it activates the magnetic core to trigger switch action speed changes with different rate of flow. The hall-effect sensor outputs the corresponding pulse signals, users can get the flow speed via detecting the pulse. It is suitable to detect flow in water dispenser or coffee machine.     ...

Garmin LIDAR-Lite v4 LED - Distance Measurement Sensor
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Price: $125.80
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Sparkfun Item #: SEN-15776 -

The LIDAR-Lite v4 LED sensor is the next step in the LIDAR-Lite line. A small, lightweight, low-power optical ranging sensor. It's the first to incorporate ANT profile wireless networking technology into an optical sensor. Its built-in nRF52840 processor means that developers can create custom applications, or be operated as a stand-alone device right out of the box by using the preloaded stock application. Like the LIDAR-Lite v3 and LIDAR-Lite v3HP sensors; it can also be directly connected...

Gravity: 27 Pcs Sensor Kit for Arduino
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Price: $129.29
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DFRobot Item #: KIT0011 -

If you want to start playing with sensors, this sensor kit for arduino will be the perfect choice for you to get started. It comes with bundle of the most popular DFRobot sensors such as light sensors, gas sensors, sound sensors, touch sensors, distance sensor, accelerometer and lots more which gives unlimited possibility to sense the physical world on your embedded devices. The wiki for these sensors and devices makes it easy to start learning. So save by purchasing them together and start...

Gravity: 9 Pcs Sensor Set for Arduino
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Price: $40.51
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DFRobot Item #: DFR0018 -

This is DFRobot's basic sensor set for arduino. Set includes light sensor, touch sensor, temperature sensor, magnetic sensor, vibration sensor, tilt sensor, big button, LED lighting module and Grayscale sensor.To connect these sensors to Arduino, we suggest to use our IO expansion shield V7.1 which has color coded pins that provides a much easier way to link sensors to microcontroller. |Specification| Analog Ambient light sensor (DFR0026) Digital Capacitive touch sensor (DFR0030) LM35...

Gravity: Analog 20A Current Sensor
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Price: $25.38
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DFRobot Item #: SEN0214 -

This Gravity Analog 20A current sensor is based on the Hall current sensing principle. It can be used for AC or DC current measurement, has a wide voltage range, a small footprint, requires no soldering and has a high level of precision.We have added high-voltage isolation in the circuit design for safety reasons and a non-conductive acrylic plate has been attached to the bottom of the PCB to prevent accidents such as short circuits, electric shocks and any other potential danger.This...

Gravity: Analog 50A Current Sensor (AC/DC)
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Price: $25.08
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DFRobot Item #: SEN0098 -

This is a breakout board for the fully integrated Hall Effect based linear ACS758 current sensor. The sensor gives precise current measurement for both AC and DC signals.The thickness of the copper conductor allows survival of the device at high overcurrent conditions. The ACS758 outputs an analog voltage output signal that varies linearly with sensed current. This current sensor enables you to monitor currents in your project every second for energy saving or circuit protecting purposes. This...

Gravity: Analog AC Current Sensor
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Price: $34.30
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DFRobot Item #: SEN0211 -

nt to measure AC current it is impractical and hazardous to cut in to your live wiring. The analog AC current sensor developed by DFRobot is a good solution to this problem. Using induction you can measure AC current without intrusive methods. Place your AC wire inside the unit, connect the unit to the sensor board using the 3.5mm jack connector and connect the sensor board to an analog input on your microcontroller. Use this sensor to measure AC motors, lighting equipment, air compressors or...

Gravity: Analog Adjustable Infrared Proximity Sensor
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Price: $11.89
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DFRobot Item #: SEN0019 -

This is an Arduino infrared distance sensor. It has an adjustable detection range, 3cm - 80cm. It is small, easy to use, assemble, and inexpensive. Useful for robotics, interactive media, industrial assembly line, etc. Infrared wave length is part of the Sun's natural light spectrum. While is a nice fit for indoor projects, outdoors with plenty of sun light and reflective surfaces on it's sight is not adviced. It's incredibly repurposable and can be used for a lot of different projects. The...

Gravity: Analog Alcohol Sensor (MQ3) For Arduino
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Price: $11.89
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DFRobot Item #: SEN0128 -

This is an Arduino Alcohol sensor. It uses a MQ3 probe which can be used in a Breathalyser. It has a high sensitivity to alcohol and less sensitivity to Benzine. The sensitivity is able to be adjusted by the potentiometer. The output is proportional to the density of gas. You can use analog reading to read the data from this sensor. To ease the difficulty of using this sensor, a Gravity Interface is adapted to allow plug&play. The Arduino IO expansion shield is the best match for this senor...

Gravity: Analog Flame Sensor For Arduino
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Price: $6.90
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DFRobot Item #: DFR0076 -

This Arduino flame sensor can be used to detect fire or other wavelength at 760 nm ~ 1100 nm light. In the fire-fighting robot game, the flame plays an important role in the probe, which can be used as the robot's eyes to find fire source or football. It can make use of fire-fighting robots, soccer robots. The Flame sensor has probe angle of 60 degrees, two M3 mounting holes is provided to install on various platforms. This arduino flame sensor's operating temperature is -25 degrees Celsius to...

Gravity: Analog High Temperature Sensor
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Price: $23.96
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DFRobot Item #: SEN0198 -

What sensor should you use when you need to measure temperature? Most people will think of a DS18B20 temperature sensor first, but this sensor is only capable of measuring temperatures up to 125C. In order to measure temperatures greater than 100C you will need something with a greater temperature range and resistance. This is the sensor you need! We have used a PT100 resistance type high temperature probe which is often used in industrial applications. Using this probe you can measure a...

Gravity: Analog LM35 Temperature Sensor For Arduino
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Price: $7.76
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DFRobot Item #: DFR0023 -

This is an Arduino Temperature Sensor based on LM35 temperature chip. A Temperature Sensor can be used to detect ambient air temperature.The LM35 chip is produced by National Semiconductor Corporation and offers a functional range between 0 degree Celsius to 100 degree Celsius with a sensitivity of 10mV per degree Celsius. The output voltage is proportional to the temperature.It is commonly used as a temperature measurement sensors. It includes thermocouples, platinum resistance, thermal...

Gravity: Analog Soil Moisture Sensor For Arduino
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Price: $4.65
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DFRobot Item #: SEN0114 -

A soil moisture sensor can read the amount of moisture present in the soil surrounding it. It's an ideal for monitoring an urban garden, or your pet plant's water level. This is a must have component for a IOT garden / Agriculture!The new soil moisture sensor uses Immersion Gold which protects the nickel from oxidation. Electroless nickel immersion gold (ENIG) has several advantages over more conventional (and cheaper) surface platings such as HASL (solder), including excellent surface...

Gravity: Analog Sound Sensor For Arduino
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Price: $7.58
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DFRobot Item #: DFR0034 -

This is a new Arduino compatible Analog Sound Sensor. Sound Sensor is typically used in detecting the loudness in ambient, the Arduino can collect its output signal and actuate accordingly. You may use it to make some funny interactive works such as a "clap and buzz" to find your lost keys or remote control if you add a buzzer. This sensor works best with our Audio analyzer module. As one of our new version of breakout boards, we have improved the analog sound sensor in below: Wide voltage...

Gravity: Analog Voltage Divider V2
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Price: $6.38
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DFRobot Item #: DFR0051 -

The Analog Voltage Divider V2 can detect the supply voltage from 0.0245V to 25V. This module is based on resistor divider principle. The voltage detection module allows the input voltage to reduce 5 times. As the Arduino analog input voltage is normally maximum 5V, the input voltage of analog voltage detection module can not exceed 5Vx5 which is 25V.Notice: The new version of analog sensor port pin mapping has been changed as the following two features. Inprovement List Wide voltage range from...

Gravity: Digital Crash sensor (Left)
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Price: $5.00
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DFRobot Item #: SEN0138-L -

A miniature snap-action switch, also trademarked and frequently known as a micro switch, is an electric switch that is actuated by very little physical force. Micro switches are very widely used; among their applications are appliances, machinery, industrial controls, vehicles, and many other places for control of electrical circuits. They are usually rated to carry current in control circuits only, although some switches can be directly used to control small motors, solenoids, lamps, or other...

Gravity: Digital Crash sensor (Right)
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Price: $5.00
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DFRobot Item #: SEN0138-R -

A miniature snap-action switch, also trademarked and frequently known as a micro switch, is an electric switch that is actuated by very little physical force.Micro switches are very widely used; among their applications are appliances, machinery, industrial controls, vehicles, and many other places for control of electrical circuits. They are usually rated to carry current in control circuits only, although some switches can be directly used to control small motors, solenoids, lamps, or other...

Gravity: Digital Infrared Motion Sensor For Arduino
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Price: $7.58
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DFRobot Item #: SEN0018 -

This is a simple to use arduino motion sensor. Power it up and wait 1-2 seconds for the sensor to get a snapshot of the still room. If anything moves after that period, the 'alarm' pin will go low. This sensor checks for infrared heat in it's detecting angle. Human body, pets and several other things emit energy that the sensor is looking for, it compares with the snapshot and if there is a recent change it triggers.Get on with your Home alarm security audit gear and experiment with this...

Gravity: Digital Magnetic Sensor
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Price: $5.00
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DFRobot Item #: DFR0033 -

what's the best way to detect the magnet? Use anther magnet. But it's not sensitive enough. You have to feel it by youself.Right. This magnetic sensor knows whether there is a magnetic object nearby or not. And it correctly tells you through ditigal output.See below picture for a quick demo! |Features| Wide voltage range from 3.3V to 5V Standard assembling structure (Times-of-5mm Center distance between two 3mm mounting holes) Easily recognitive interfaces of sensors ("A" for analog and "D"...

Gravity: Digital Piezo Disk Vibration Sensor
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Price: $7.76
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DFRobot Item #: DFR0052 -

The DFRobot Vibration Sensor buffers a piezoelectric transducer that responds to strain changes by generating a measurable output voltage change which is propotional with the strength of vibration.So you can know the extent of vibration. Different from digital vibration sensor that only accounts times, this analog one can tell extent of vabiration.|Specification| Supply Voltage: 3.3V to 5V Interface: Analog Size:22x30mm (0.87x1.2'') |Documents| Wiki Analog Piezo Disk Vibration Sensor...

Gravity: Digital Tilt Sensor for Arduino / Raspberry Pi
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Price: $3.36
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DFRobot Item #: DFR0028 -

This is an arduino tilt sensor. It is used to detect orientation. Inside the sensor, there is a ball that make contact with the pins when the case is upright. Tilt the sensor over and the balls don’t touch, thus not making a connection.Here is the principle of tilt sensor to illustrate how it works: Simple plug to our Arduino IO Sensor Expansion Shield, you can make amazing interactive projects. As this sensor is now woking under 3.3V, it is now able to be compatible with Raspberry Pi....

Gravity: Digital Vibration Sensor
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Price: $7.76
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DFRobot Item #: DFR0027 -

What's the simplest way to check vibration with Arduino? Use a vibration sensor from DFRobot. You can directly plug it on our IO Expesion Shield V7. Just vibrate this sensor, Arduino can receive a digital signal. It's easy to acount and program in Arduino. Despite it's simple, you can make full use of it with creative thinking, like step counting, Crash warning light and so on. Inprovement Wide voltage range from 3.3V to 5V Standard assembling structure (Times-of-5mm Center distance between...

Gravity: DS18B20 Temperature Sensor  (Arduino Compatible)
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Price: $6.90
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DFRobot Item #: DFR0024 -

While there are many types of temperature sensors available in the market, the DS18B20 arduino Temperature Sensor form DALLAS is the best choice in applications which require high accuracy and high reliability. Its ultra-small size, low hardware overhead, strong anti-interference capability and high accuracy, together with other additional features makes DS18B20 even more popular among users. For electronic enthusiasts and hobbyists, the DS18B20 is a good start for learning and developing...

Gravity: Flexible Piezo Film Vibration Sensor
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Price: $10.17
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DFRobot Item #: SEN0209 -

This is an Arduino compatible piezo film vibration sensor. It is made up of flexible piezo film and converter board. The sensor is able to detect vibration, flexibility, impact and touch.The film is a flexible component comprising a 28 µm thick piezoelectric PVDF polymer film with screen-printed Ag-ink electrodes, laminated to a 0.125 mm polyester substrate, and fitted with two crimped contacts. As the piezo film is displaced from the mechanical neutral axis and bending creates very high...

Gravity: Heart Rate Monitor Sensor for Arduino
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Price: $27.27
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DFRobot Item #: SEN0203 -

The DFRobot heart rate sensor is a thumb-sized heart rate monitor designed for Arduino microcontrollers.This heart rate monitor sensor is a pulse sensor which is developed based on PPG techniques. This is a simple and low-cost optical technique that can be used to detect blood volume changing in the microvascular bed of tissues. It is relatively easy to detect the pulsatile component of the cardiac cycle according to this theory. The sensor has two holes that you can use to attach to your...

Gravity: Joystick Module V2
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Price: $9.14
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DFRobot Item #: DFR0061 -

Lots of robot projects need joystick. This updated joystick module V2 provides an affordable solution. Simply connect to two analog inputs, the robot is at your commands with X,Y control. It also has a switch that is connected to a digital pin. This joystick module can be easily connect to Arduino by our IO Expansion Shield with supplied cables.Notice: The new version of analog sensor port pin mapping has been changed as the following two features.|features| Wide voltage range from 3.3V to 5V...

Gravity:DIGITAL IR Transmitter Module
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Price: $6.72
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DFRobot Item #: DFR0095 -

An infrared transmitter is simply a Light Emitting Diode which generates IR light (invisible IR light)--light with a wavelength of between 1 mm and 750 nanometers, and some associated circuitry. In an infrared remote control, for example, pushing a button sends an electric signal to the LED, which converts the signal into a beam of infrared light. The receiving device detects the light with a photo diode and converts it to an electrical signal which, via an integrated circuit, controls its...

Gravity:Digital Line Tracking(Following) Sensor For Arduino
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Price: $8.45
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DFRobot Item #: SEN0017 -

This is a line tracking (following) sensor to guide your robot by telling white from black quickly and accurately. It is commonly used in arduino robot project, and probably is the best line following sensor in the market.Line following is the most basic function of smart mobile robot. As you can see line tracking robot one of the easiest ways for a robot to successfully and accurately navigate. We designed this new generation of line tracking sensor to be your robot's powerful copilot all the...

Gravity:SHT1x  Humidity and Temperature Sensor
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Retail: $34.60
Price: $20.51
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DFRobot Item #: DFR0066 -

Here is the most qualified Humidity and Temperature Sensor from DFRobot. Accurate, durable, highly compatible and easy to use, it has all the attributes of a superior sensor requires.This sensor uses SHT1x sensor. SHT1x is individually calibrated in a precision humidity chamber. The calibration coefficients are programmed into an OTP memory on the chip. These coefficients are used to internally calibrate the signals from the sensors. The 2-wire serial interface and internal voltage regulation...

Hall Sensor - A3144E (5pcs pack)
Price: $2.65
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Elecrow Item #: EL-SPM31441S -

This is a Hall-effect switches sensor that integrated circuits with tighter magnetic specifications, it can work at +150?C temperatures Environment.and is more stable with both temperature and supply voltage changes. It has a voltage regulator, reverse battery protection diode,quadratic Hall-voltage generator, temperature compensation circuitry, small signal amplifier,schmitt trigger, and an open-collector output. Features Superior Temp. Stability for Automotive or Industrial Applications 4.5...

Hall Sensor Module
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Elecrow Item #: EL-SPM11042S -

    This Hall Sensor Module used Hall Sensor - A3144E. The Hall Sensor measures the Hall Effect, which is a production of a voltage difference across an electrical conductor, transverse to an electric current in the conductor as well as a magnetic field perpendicular to the current. The output of the Hall sensor switches low and turns on when a magnetic field perpendicular to the Hall sensor exceeds the BOP threshold, and it switches high and turn on when the magnetic field...

Hall-Effect Sensor - AH1815 (Non-Latching)
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Price: $2.11
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Sparkfun Item #: SEN-14709 -

The AH1815 is an integrated Hall-Effect non-latched sensor. That’s nice but what does it do? Holding a magnet near the sensor will cause the output pin to toggle. This makes for a robust presence sensor. A reed sensor also works nicely, but can be limited by the glass encapsulation and size. A Hall-Effect sensor is much smaller, but can handle less current than a reed switch. The AH1815 is a low-sensitivity, micro-power Omnipolar Hall effect switch IC, designed for portable and battery powered...