Carbon monoxide detector with alarm - orno

This UV Sensor is capable of detecting UV solar radiation using a simple UVM-30A chip. It can be easily configured for projects with Arduino to monitor UV Index, analyze UV-A lamps or DIY projects as plant growth analysis.

The Pololu USB to serial adapter is great for connecting microcontroller designs to a personal computer. The adapter uses 3.3 V signal levels so you can connect it directly to any microcontroller running at up to 5 V without the hassle of an RS-232 to TTL level converter.

This relay shield is capable of controlling 4 relays . The maximum switching power can be 360VA / 90W . It can be controlled directly by the Arduino by means of digital IOs digital with external power of 9v . With integrated xbee socket and APC220 socket, it can be controlled wirelessly via Xbee / bluetooth / APC220 . Make it an ideal solution for home automation and robotics.

DFRobot Relay Shield  V2.1 is a completely new design which is capable of controlling 4 relays at a time.

SparkFun humidity sensor - HIH-4030

The Kit Set of Torix Connectors is widely used in building wiring. By selecting the best insulation material, it is durable, corrosion free, anti-aging, pressure 4kv and against electric shock. It breaks the disadvantage of the traditional wiring method which is problematic in wiring, easy to leak, and easy to corrode.

This LED Matrix 24 × 8 display is specially designed for the FireBeetle series. It supports low power mode and scroll display. With HT1632C high-performance LED driver chip , each led has an independent register, which facilitates separate driving. Integrates a 256KHz RC clock, only 5uA in low power mode, supports 16-scale PWM brightness adjustment. This product also works with another Arduino microcontroller like Arduino UNO (same as DFRduino UNO).

When you assign a high level to the module pin, the electro magnet can suck magnetically conductive objects. Otherwise, it will release the object.

An electro magnet is a type of magnet in which the magnetic field is produced by electric current. An electric current flowing in a wire creates a magnetic field around the wire, due to the Ampere Law. To focus the magnetic field on an electro magnet, the wire is wound into a coil with many twists of wire side by side. The Magnetic Field of All Twists of the Wire passes through the Coil Center, creating a Strong Magnetic Field there.

It's Easy to Use to Learn the Electro Magnet Principle.

The BME280 Atmospheric Sensor from Whadda is the easiest way to measure barometric pressure, humidity and temperature.

This DTMF Shield is a Dual-tone multi-frequency signaling module decoder for Arduino With it's audio connector you can decode the crazy funny noises common phones make.

Kit Thermostat with LED Indicator - Velleman.

This Load Sensor, sometimes called a strain gauge, is the same one found in digital bathroom scales. This sensor can measure up to about 110 pounds. 

The SparkFun ESP8266 WiFi Shield is an Arduino compatible shield for the ESP8266 WiFi SoC – a leading platform for Internet of Things (IoT) or WiFi-related projects. There are a variety of designs based around the ESP8266, including tiny, modular boards and more accessible development boards like our very own SparkFun ESP8266 

WiDo is a WIFI IoT Node development board compatible with Arduino.

8 relay module with ports " NC " means " Usually connected to COM " and ports "NO" means " Usually open to COM ".

BTBee Pro is a Bluetooth serial port module that can be compatible with shields that have XBee socket.

Joystick red by Joy-D.

Life has its ups and downs, so why not measure them? The MPL3115A2 is a MEMS pressure sensor that provides Altitude data to within 30cm (with oversampling enabled).