Detects white or black/nothing in a few millimeters behind the sensor and reports them as simple HIGH or LOW
A low-end hygrometer based on DHT-11 for ±2 °C temperature measurements
Connect your Arduino to LAN or internet for stable HTTP, TCP, or UDP
An I²C controlled board giving extra 9 pins with 12-bit ADC and 16-bit PWM
Turn your device into a not-so-smart-phone; control with SMS, make and receive calls, use mobile data
An NMEA serial receiver to know your latitude, longitude, altitude, speed, and time
An NMEA serial receiver to know your coordinates, altitude, speed, and time; even if the device is under a roof
Drives a DC motor or another load requiring current flow inversion; provides up to 1.2 A of continous current
Resolve I²C address conflicts by putting the peripherals behind this 8-channel proxy
A button and LED with all neccessary resistors and power key on a single module
Send infrared signals to your appliances mockering the native remote
Measure distance in 0 to 100 mm range and ambient lightness precisely
An expansion board to free your device from the wall plug; rechargable like a phone with microUSB
An array of gray-shade sensors baked by own processor to precisely track a line below the robot
Make a line-out out of your controller DAC for further floating wires amplifier connection
Detects LPG, propane, butane, and their derivatives