DFRobot

US$56.25

This is an anti-rust, robust and precise SHT1x sensor, which can master enterprise-class and industrial-level applications. It can be applied in various fields: telepoint base stations, electronic control cabinet, production site, storehouse, machine rooms, greenhouses, animal farming, medicine stock and etc.

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US$4.19

This small size breakout is programmable full-color RGB LED for hobbyists, industrial designers, prototypers, and experimenters.

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US$4.13

This small size breakout is programmable full-color RGB LED for hobbyists, industrial designers, prototypers, and experimenters.

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US$9.73
The module comes fully assembled and pre-programmed with the current time (ok, so it's our current time - MST).
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US$24.21
The 6 Dof sensor breakout integrate with the MPU6050 sensor and the low noise 3.3v regulator and pull-up resistors for the I2C bus. So it's available to directly hook up the sensor with the Arduino processors for your robotics,HCI and wearable projects.
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US$12.59
This is suitable for detecting alcohol, this sensor can be used in a Breathalyser. It has a high sensitivity to alcohol and small sensitivity to Benzine. Sensitivity can be adjusted by the potentiometer.
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US$12.59

The MQ5 is used in gas leakage detecting equipment in consumer and industry applications,this sensor is suitable for detecting LPG, natural gas, coal gas. Avoid the noise of alcohol, cooking fumes and cigarette smoke. The sensitivity can be adjusted by the potentiometer.

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US$12.53
This is used in gas leakage detecting equipments in consumer and industry markets, this sensor is suitable for detecting LPG, i-butane, propane, methane ,alcohol, Hydrogen, smoke.
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US$13.93
This is a simple-to-use liquefied petroleum gas (LPG) sensor. It can be used in gas leakage detecting equipment in consumer and industry applications,this sensor is suitable for detecting LPG, iso-butane, propane, LNG.
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US$23.73
The upgraded Arduino Input Shield includes a two axis mini joystick (with moment switch) as well as four colored push buttons(Red,Yellow,Blue,Green).
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US$15.33
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 (DFR0265) with supplied cables.
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US$19.53
This DFRobot SD card shield is a Break out board for standard SD card. It allows you to add mass storage and data logging to your project.
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US$18.13
This adapter helps to connect TTL (Transistor-Transistor Logic) level signals to RS232 interface.
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US$15.33
This is a complete color detector, including a TAOS TCS3200 RGB sensor chip and 4 white LEDs. The TCS3200 can detect and measure a nearly limitless range of visible colors.
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US$20.93
If you need to charge LiPo batteries, this simple charger will do just that, and do it fast! The Lithium Battery Charger can charge 3.7V LiPo battery at a rate of 500mA per hour. 
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