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 …

The SHT21 is a low cost humidity and temperature sensor. Its an I2C device so again is very simple to connect to any arduino The digital SHT2x humidity sensor series is used in high volumes in a wide variety of …

I recently acquired a BMP180 barometric pressure sensor and was pleased to see that it used the BMP085 library from Adafruit, what I was interested in was how accurate the altitude reading was. This is a picture of the breakout …

Previously we showed an example of the fan module here http://www.arduinolearning.com/learning/basics/arduino-and-l9110-fan-module-example.php . This used digital I/O but of course you can send an analog value using a pin that supports PWM. I found out if the number was under 75 the fan …

In this example we connect an Arduino to a L9110 fan module. This is a commonly found, basic low cost module which consists of an L9110 chip and a small motor attached. You need 4 connections between the arduino and …

Generally you can buy any Arduino board on the internet and they will work out of the box, this means that you can find many suitable development boards at reasonable prices on the internet if you are prepared to buy …