In this example we will connect a GA1A12S202 Log-Scale Analog Light Sensor to an Arduino. The features of this sensor are as follows Output voltage increases with light on the sensor Logarithmic response not only gives more sensitivity in low …

In this example we take a look at the MAX6675 Cold-Junction-Compensated K-Thermocouple-to-Digital Converter The MAX6675 performs cold-junction compensation and digitizes the signal from a type-K thermocouple. The data is output in a 12-bit resolution, SPI™-compatible, read-only format. This converter resolves temperatures …

I  decided to use Johnny-five (http://johnny-five.io/) , we were having a play about with Javascript. In this example I wanted see how easy it was to write something on an LCD, to be eact I would be using an LCD keypad …

The HDC1000 is a digital humidity sensor with integrated temperature sensor that provides excellent measurement accuracy at very low power. The device measures humidity based on a novel capacitive sensor. The humidity and temperature sensors are factory calibrated. The sensing …

In this example we use an Arduino Esplora nad use the on board micropone and RGB led and create a sound level project, if the sound level is an acceptable level then the RGB led will be green, if the …

This is a basic ‘barebones arduino’, this is an Atmega328 based design. In this example we are externally powering the Atmega from a 5v source, this removes the need for a 5v on board regulator. In theory you can also …

This example shows how Arduino Uno + RFID-RC522 (RFID reader) to dump info of RFID key and RFID card, here is a picture of the module. The microcontroller and card reader uses SPI for communication . The card reader and …

In this example we will create a Magic 8-ball using an Arduino Uno and an LCD keypad shield, when one of the buttons is pressed a random message will be displayed. The Magic 8 Ball is a toy used for …

The bar graph is basically a series of LEDs in a line, this is a common hardware display for analog sensors. It’s made up of a series of LEDs in a row, you simply treat these as you would do …

This is just another simple app to control an RGB led, this time the app is a color picker Schematic Arduino Code [codesyntax lang=”cpp”] const int RED_LED = 9; const int GREEN_LED = 10; const int BLUE_LED = 11; void …

This example was just a modification our LM35 sensor example at http://www.arduinolearning.com/code/lm35-temperature-sensor.php. This time we will create an app to read the value sent rather than using the serial monitor. Arduino Code Slight change in that we removed some of the …

In this example we will connect an RGB LED to our Arduino and control it via a C# winforms app that will send commands down to the Arduino via the com port. In this example we keep the commands very …