Sound Sensors

1. Sound sensor ($4.90 USD)


The Sound sensor module is a simple microphone. Based on the power amplifier LM386 and the electret microphone, it can be used to detect the sound strength of the environment. The value of output can be adjusted by the potentiometer.

Features

Light Sensors

  1. Digital Light Sensor ($9.90 USD)

This module is based on the I2C light-to-digital converter TSL2561 to transform light intensity to a digital signal. Different from traditional analog light sensor, as Grove – Light Sensor, this digital module features a selectable light spectrum range due to its dual light sensitive diodes: infrared and full spectrum. You can switch between three detection modes to take your readings. They are infrared mode, full spectrum and human visible mode. When running under the human visible mode, this sensor will give you readings just close to your eye feelings.

Features:

2. Directional light / flame sensor

The Grove - Flame Sensor can be used to detect fire source or other light sources of the wavelength in the range of 760nm - 1100 nm. It is based on the YG1006 sensor which is a high speed and high sensitive NPN silicon phototransistor. Due to its black epoxy, the sensor is sensitive to infrared radiation. In fire fighting robot game, the sensor plays a very important role, it can be used as a robot eyes to find the fire source.

The module is mainly used to detect the infrared light. It outputs digital signal 0 and 1 through a Comparator output. The output value will be 0 when infrared light is detected. And the sensitivity is adjustable by the precision potentiometer.

Let's use it to control. When the output value is 0, the led will light up.

Environmental Sensors

  1. Dust sensor ($15.95) USD

    Used to create Digital (Lo Pulse) output to Particulate Matters (PM). Lo Pulse Occupancy time (LPO time) is in proportion to PM concentration. The output is for PM whose size is around 1 micro meter or larger. We can use the sensor to detect the dust indoors and outdoors.

2. Temperature and Humidity

This is a multifunctional sensor that gives you temperature and relative humidity information at the same time. It utilizes a DHT11 sensor that can meet measurement needs of general purposes. It provides reliable readings when environment humidity condition inbetween 20% RH and 90% RH, and temperature condition inbetween 0°C and 50°C, covering needs in most home and daily applications that don't contain extreme conditions.

  • Signal Collecting Period: 2S

3. Air quality sensor 

This sensor is designed for comprehensive monitor over indoor air condition. It's responsive to a wide scope of harmful gases, as carbon monixide, alcohol, acetone, thinner, formaldehyde and so on. Due to the measuring mechanism, this sensor can not output specific data to describe target gases' concentrations quantitatively. But it's still competent enough to be used in applications that require only qualitative results, like auto refresher sprayers and auto air cycling systems. This sensor does better in providing qualitative results over a wide scope of target gases. In this demo, we define 4 statuses for reference in the .cpp file. They are:


  • Features

    • Responsive to a wide scope of target gases
    • Cost efficient
    • Durable
    Cautions

    • Require relatively clean air as an initial condition. 
    • Long time exposure to highly polluted air can significantly weaken its sensitivity.

4. PIR Motion Sensor Module ($7.90 USD)

Highly integrated module popularly used for entry detection, it complies with microcontroller or DC loads.
 
Applications
  • Switch
  • Motion sensor
  • Thief-guarding system
  • Industrial automation
 
Specifications
  • Input voltage: DC 4.5~20V
  • Static current: 50uA
  • Output signal: 0,3V (Output high when motion detected)
  • Sentry angle: 110 degree
  • Sentry distance: max 7 m

5.Soil moisture sensor

This Moisture Sensor can be used to detect the moisture of soil or judge if there is water around the sensor, let the plants in your garden reach out for human help. They can be very easy to use, just insert it into the soil and then read it. With the help of this sensor, it will be realizable to make the plant remind you : hey, i am thirsty now, please give me some water.

  • Soil moisture sensor based on soil resistivity measurement
  • Easy to use
  • 2.0cmX6.0cm grove module


Pressure Sensors

  1. Pressure Sensor (100lb but can get different ranges)

Possible uses:

  • tracing footsteps
  • reconfiguring furniture when someone sits down 
  • measuring the weight of something

Key Facts:

  • Sensing area: (0.375 in.) diameter 
  • Requires: Arduino UNO or other Arduino compatible board; breadboard; M/M jumper wires; 1 MegaOhm Resistor; Arduino IDE for programming
  • Basic code is provided on Sparkfun to get started 

2. Water flow sensor

Water flow sensor consists of a plastic valve body, a water rotor, and a hall-effect sensor. When water flows through the rotor, rotor rolls. Its speed changes with different rate of flow. The hall-effect sensor outputs the corresponding pulse Signal. 

You will need Seeeduino / Arduino ,Water Flow Sensor,10K resistor,a breadboard and some jumper wires.

Wiring up the Water Flow Sensor is pretty simple. There are 3 wires: Black, Red, and Yellow. Black to the Seeeduino's ground pin Red to Seeeduino's 5v pin The yellow wire will need to be connected to a 10k pull up resistor.and then to pin 2 on the Seeeduino.

Chemical Sensors

  1. Alcohol sensor

Grove - Alcohol Sensor is a complete alcohol sensor module for Arduino or Seeeduino. It is built with MQ303Asemiconductor alcohol sensor. It has good sensitivity and fast response to alcohol. It is suitable for making Breathalyzer. This Grove implements all the necessary circuitry for MQ303A like power conditioning and heater power supply. This sensor outputs a voltage inversely proportional to the alcohol concentration in air.

  • Input Voltage: 5V
  • Working Current: 120mA
  • Detectable Concentration: 20-1000ppm
  • Grove Compatible connector
  • Highly sensitive to alcohol.
  • Fast response and resumes quickly after alcohol exposure.
  • Long life.
  • Compact form factor.   

Misc.

  1. Magnetic Card (facts from Sparkfun and wikipedia)
  • 30mil standard card with a low coercivity magnetic stripe. 
  • The stripe can contain up to 3 tracks of information. 
  • This card can be erased and written multiple times with a compatible writer.
  • only .95 cents
  • LoCo cards are much easier to erase and have a shorter lifespan
  • Track 1 is written with code known as DEC SIXBIT
  • his format was developed by the banking industry (ABA). This track is written with a 5-bit scheme (4 data bits + 1 parity), which allows for sixteen possible characters