This was an interesting little 3 in 1 sensor module which has the following sensors fitted The HTU21D is a low-cost, easy to use, highly accurate, digital humidity and temperature sensor. The BMP180 is the new digital barometric pressure sensor …

The HC-SR505 Mini PIR Motion Sensor is based on infrared technology and it can automatic control by itself with high sensitivity and high reliability. Because of the minimum size and low-power operation mode, it widely used in various of automatic …

This is a simple data logging shield which will enable you to add SDCard storage support and RTC capability to your Arduino project. Here is a picture of the shield that I purchased Features Here is a summary of the …

The TEA5767HN is a single-chip electronically tuned FM stereo radio for low-voltage applications with fully integrated Intermediate Frequency (IF) selectivity and demodulation. The radio is completely adjustment-free and only requires a minimum of small and low cost external components. The …

The PCF8574 is an 8 bits I/O port expander that uses the I2C protocol. Using this IC, you can use only the SDA and SCL pins of your Arduino board to control up to 8 digital I/O ports. This 8-bit …

I purchased the following shield but there was limited information about it, it contains a SD card interface and appears to be a TFT shield type. On further investigation I found that the built in TFT library could be used …

I purchased this module as part of a microcontroller kit, its an interesting little module as it has 16 buttons but with only 1 I/O line is required, an analog input. You connect this to your Arduino and read in the …

This was a module based on the TM1638 IC that I purchased. The imprtant connections are as follows data pin 3 clock pin 2 strobe pin 5 I decided to create an example that would display the button pressed on …

The knightrider / larson / cylon effect Schematic Code [codesyntax lang=”cpp”] int pinArray[] = { 2, 3, 4, 5, 6, 7, 8, 9}; int count = 0; int timer = 10; void setup() { for (count=0;count<8;count++) { pinMode(pinArray[count], OUTPUT); } …

The ML8511 measures the amount of ultra violet rayses contained in sunlight, and it is used for the equipment which displays the suntan by a ultra violet rays, the guidance for UV care of skin, etc The sensor detects 280-390nm …

In this example we use the DHT22 (or AM2302) humidity/temperature sensor and the Arduino UNO board to read data and print it out to the serial monitor. The DHT22 is better than the DHT11 because it has a wider range of …

In a previous example we connected a SHT21 temperature and humidity sensor to an Arduino – http://www.arduinolearning.com/code/sht21-humidity-and-temperature-sensor-example.php. This was a bit basic as the data was sent via the serial port, so lets add an LCD to display the temperature and …