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 Sparkfun products range from things like resistors and LEDs to humidity sensors and LCD screens.  Including: Books, Cables, Cellular, Components, Development Tools, E-Textiles, GPS, Kits, LCDs, Programmers, Prototyping, Sensor, Tools, Robotics, Wireless

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    Alcohol Gas Sensor MQ-3 Alcohol Gas Sensor MQ-3 This alcohol sensor is suitable for detecting alcohol concentration on your breath, just like your common breathalyzer. It has a high sensitivity and fast response time. Sensor provides an analog resistive output based on alcohol concentration. The drive circuit is very simple, all it needs is one resistor. A simple interface could be a 0-3.3V A... $5.62

    Ships in 3 to 7 days
    Gas Sensor Breakout Board Gas Sensor Breakout Board Simple breakout board for the MQ - 3, MQ - 4, MQ - 6 and MQ - 7 gas sensors.  All you need is VCC at 5V, GND, and a resistor to an ADC, that is it. Note: This is the PCB only. Sensors listed below. Dimensions: 16.8mm diameter Documents: Schematic Wiring Example &#x... $0.95

    Ships in 24 hours
    Optical Dust Sensor - GP2Y1010AU0F Optical Dust Sensor - GP2Y1010AU0F Sharp's GP2Y1010AU0F is an optical air quality sensor, designed to sense dust particles. An infrared emitting diode and a phototransistor are diagonally arranged into this device, to allow it to detect the reflected light of dust in air. It is especially effective in detecting very fine particles like cigarette smoke, and is commonly used in air... $13.50

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    Carbon Monoxide Sensor - MQ-7 Carbon Monoxide Sensor - MQ-7 This is a simple-to-use Carbon Monoxide (CO) sensor, suitable for sensing CO concentrations in the air. The MQ-7 can detect CO concentrations anywhere from 20 to 2000ppm.This sensor has a high sensitivity and fast response time. The sensor's output is an analog resistance. The drive circuit is very simple; all you need to do is power the heater ... $7.87

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    Methane CNG Gas Sensor - MQ-4 Methane CNG Gas Sensor - MQ-4 This is a simple-to-use compressed natural gas (CNG) sensor, suitable for sensing  natural gas (composed of mostly Methane [CH4]) concentrations in the air. The MQ-4 can detect natural gas concentrations anywhere from 200 to 10000ppm. This sensor has a high sensitivity and fast response time. The sensor's output is an analog resistance. The dri... $5.62
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    Polar Heart Rate Monitor Interface Polar Heart Rate Monitor Interface This is a wonderful evaluation board cooperatively designed by danjuliodesigns and SparkFun. The Heart Rate Monitor Interface (HRMI) is an intelligent peripheral device that converts the ECG signal from the Polar Heart Rate Monitor (HRM) into easy-to-use heart rate data. It implements a sophisticated algorithm for computing an average hear... $59.95
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    LPG Gas Sensor - MQ-6 LPG Gas Sensor - MQ-6 This is a simple-to-use liquefied petroleum gas (LPG) sensor, suitable for sensing  LPG (composed of mostly propane and butane) concentrations in the air. The MQ-6 can detect gas concentrations anywhere from 200 to 10000ppm. This sensor has a high sensitivity and fast response time. The sensor's output is an analog resistance. The drive circuit... $5.62

    Ships in 24 hours
    Hydrogen Gas Sensor - MQ-8 Hydrogen Gas Sensor - MQ-8  Hydrogen Gas Sensor - MQ-8sku: SEN-10916   This is a simple-to-use hydrogen gas sensor, suitable for sensing hydrogen concentrations in the air. The MQ-8 can detect hydrogen gas concentrations anywhere from 100-10000ppm. This sensor has a high sensitivity and fast response time. The sensor's output is an analog resistance. The drive circuit is... $7.95

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    Fingerprint Scanner - 5V TTL Fingerprint Scanner - 5V TTL Fingerprint Scanner - 5V TTL SEN-11651  Fingerprint scanners are awesome. Why use a key when you have one right at the tip of your finger? Unfortunately, they're usually unreliable or difficult to implement. Well not anymore! We've found this great fingerprint module from ADH-Tech that communicates over TTL Serial so you can easily ... $60.50

    Ships in 24 hours
    Fingerprint Scanner - 5V TTL Fingerprint Scanner - 5V TTL Fingerprint Scanner - 5V TTL SEN-11792 Fingerprint scanners are awesome. Why use a key when you have one right at the tip of your finger? Unfortunately, they're usually unreliable or difficult to implement. Well not anymore! We've found this great fingerprint module from ADH-Tech that communicates over TTL Serial so you can easily embed it into ... $52.50

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    Fingerprint Scanner - 5V TTL (GT-511C1) Fingerprint Scanner - 5V TTL (GT-511C1) Fingerprint Scanner - 5V TTL (GT-511C1) SEN-11836 Fingerprint scanners are awesome. Why use a key when you have one right at the tip of your finger? Unfortunately, they're usually unreliable or difficult to implement. Well not anymore! We've found this great fingerprint module from ADH-Tech that communicates over TTL Serial so you can easily emb... $39.00
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    Fingerprint Slide Scanner Interface Cable Fingerprint Slide Scanner Interface Cable This cable interfaces to the Fingerprint Slide Scanners 6 pin connector. Comes terminated as a MLX 1.25mm male connector to six open wires.Dimensions: ~5.8" (150mm) long $1.95

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    Dissolved Oxygen Kit Dissolved Oxygen Kit  Dissolved Oxygen Kit SEN-11194 Atlas Scientific is on a mission to make high-quality sensors for environmental monitoring available to everyday hackers and makers. All of their kits are easy to calibrate and connect to your microcontroller-based project.There are basically two easy ways to measure oxygen dissolved in water: You can guess and th... $255.00

    Ships in 3 to 7 days
    Fingerprint Scanner Fingerprint Scanner The Nitgen RS232 serial fingerprint scanner is a powerful ADSP-BF531 Blackfin based system. This scanner is capable of gathering and storing unique finger prints. Simply hold your finger on the optical scanner, query the device over serial, and you will be issued a unique ID. Use that ID within your embedded system to determine access levels, ti... $164.38
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    Fingerprint Slide Scanner Fingerprint Slide Scanner This is a low-cost finger print scanner with a slide type sensor where the user slides their finger over the scanner. The ARA-ME-01 uses a simple serial interface that makes identifying users by their finger print fast and easy. This scanner is capable of gathering and storing unique finger prints. Simply hold your finger on the optical sc... $101.13
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    Polar Heart Rate Module - RMCM01 Polar Heart Rate Module - RMCM01 This is a OEM module for the Polar Heart Rate system. This device works with any Polar heart rate strap to pickup the electromagnetic pulse and output a 1ms pulse indicating a heart beat has occurred. Embed a heart rate reading into your next project! The RMCM01 requires no antenna. It does require a 32kHz crystal but that cryst... $20.90
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    Data Logger - Atlas Scientific ENV-32X Data Logger - Atlas Scientific ENV-32X  Data Logger - Atlas Scientific ENV-32X SEN-11196 Atlas Scientific is on a mission to make high-quality sensors for environmental monitoring available to everyday hackers and makers. All of their kits are easy to calibrate and connect to your microcontroller-based project.You know what's exciting? Oh yes, data-logging. No, seriously, by logging ... $43.50

    Ships in 3 to 7 days
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