The DHT22 is a basic, low-cost digital temperature and humidity sensor. It uses a capacitive humidity sensor and a thermistor to measure the surrounding air, and spits out a digital signal on the data pin (no analog input pins needed). Its fairly simple...

Punch in your secret key into this numeric matrix keypad. This keypad has 12 buttons, arranged in a telephone-line 3x4 grid. It's made of a thin, flexible membrane material with an adhesive backing (just remove the paper) so you can attach it to nearly...

How could something so simple be so useful? We heard once that in the 4th millenium B.C. some guy asked the person who invented the wheel that question.  The person who invented the wheel's answer, we were told, was something like "Well...

These displays are small, only about 1" diagonal, but very readable due to the high contrast of an OLED display. This display is made of 128x32 individual white OLED pixels, each one is turned on or off by the controller chip. Because the display makes...

This is a 5V 8-Channel Relay interface board able to control various appliances, and other equipment with large currents. It can be controlled directly by Micro-controller (Raspberry Pi, Arduino,etc.). Features 5V 8-Channel Relay interface board,...

If you're like me, you've dreamed of being a dolphin - smoothly gliding through the water. Using your echo-location abilities to detect tasty fish treats. Until genetic modifications catches up with our desires, we'll just have to make do with this...

Not just a simple breakout board, this microSD adapter goes the extra mile - designed for ease of use. Onboard 5v->3v regulator provides 150mA for power-hungry cards 3v level shifting means you can use this with ease on either 3v or 5v...

Description: These headers are made to work with the Arduino Uno R3, Leonardo and new Arduino boards going forward. They are the perfect height for clearing the USB-B connector and great for stacking multiple shields. This kit includes 4 headers (2...

Description 1. The Sound Detector is based on a microphone and a power amplifier. It can be used for detecting the sound strength of the environment. 2. This sound sensor gets signal by both digital and analog output. 3. "AO" outputs real-time voltage...

24C32 32K I2C EEPROM Memor DS1307 based RTC with LIR2032 battery (Battery not included) Backup by AT24C32 32Kbit DS1307,AT24C32 can work separated Leads to the DS1307 clock pin, to provide the clock signal for the microcontroller Great for DIY projects ...

Various flame, fire detection, relay output, which can be accessed 220V high current electrical equipment Module Features: 1, can detect the flame or the wavelength at 760 nm to 1100 nm range of the light source, the test flame lighters distance of...

Operating Voltage : 5V(DC) Static Current: Less than 2mA. Output Signal: Electric frequency signal, high level 5V, low level 0V. Sensor Angle: Not more than 15 degrees Detection Distance: 2cm-450cm High Precision: Up to 0.3cm Input Trigger Signal: 10us...

The board might come in green color too This is an Ethernet Board that plugs directly into any Arduino UNO or other Arduino Board, allowing it to connect to the internet through an Ethernet connection. This allows you to control the Arduino through the...

This is a very popular LCD for the Arduino or Freeduino board. It includes a 2×16 LCD display which is backlit in blue. It uses the I2C communications protocol so it is compatible with any Arduino or Raspberry Pi! Key Features: Supports I2C...

4pin Mini Voice Sound Sensor Module Microphone Sound module - LM393 Chip  This sensor emits a signal if the microphone of the sensor detects a noise. The sensitivity of the sensor can be adjusted by means of a controller...

This is a digital light sensor that can be used to precisely measure the ambient light level.  The sensor has a 16 Bit AD converter so it outputs a digital signal that can be read using the Arduino's serial connections.  It...

This is what is known as a Real Time Clock (RTC) module and can be used with any Arduino so that it can tell time. The Arduino does not have a RTC on board and therefore can not tell time for an extended period of time with any accuracy. When the Arduino...