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 …

In this simple project we will create a simple morse code flasher, you will use the serial monitor to type in a message and this will then be flashed in morse code on an LED. If you wish to learn …

In this example we will connect an LM35 temperature sensor to our Arduino The LM35 series are precision integrated-circuit temperature sensors, whose output voltage is linearly proportional to the Celsius (Centigrade) temperature. The LM35 thus has an advantage over linear …

On one of my recent visits to an electronics website I saw this voltage sensor, intrigued I bought it and wondered how it worked, there didn’t seem much to it. As an Arduino is limited to 5v maximum on its …

The Pulse Sensor Amped is a a plug-and-play heart-rate sensor for Arduino and Arduino compatibles. It can be used by people who want to easily incorporate live heart-rate data into their projects. You gently place the sensor on any area …

In this example we will connect an L298 to our Arduino and drive a motor. A switch will change the direction of the motor The L298 is an integrated monolithic circuit in a 15-lead Multiwatt and PowerSO20 packages. It is …