The Ping))) is an ultrasonic range finder from Parallax. It detects the distance of the closest object in front of the sensor (from 2 cm up to 3m). It works by sending out a burst of ultrasound and listening for the echo when it bounces off of an object. The Arduino board sends a short […]
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This example illustrates the use of the Mouse and keyboard libraries together. Five momentary switches act as directional buttons for your cursor. When a button is pressed, the cursor on your screen will move, and a keypress will be sent to the computer. Once you have the Leonardo programmed and wired up, open up your
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Using the Mouse library, you can controls a computer’s onscreen cursor with an Arduino Leonardo, Micro, or Due. This particular example uses a pushbutton to turn on and off mouse control with a joystick. Cursor movement from the Arduino is always relative. So every time the analog input is read, the cursor’s position is updated
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LED displays are often packaged as matrixes of LEDs arranged in rows of common anodes and columns of common cathodes, or the reverse. Here’s a typical example, and its schematic: These can be very useful displays. To control a matrix, you connect both its rows and columns to your microcontroller. The columns are connected to
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Arduino can send output through serial communication to your computer over USB. The output can be anything such as status, text, sensor reading, value, number etc. You can view the status output by clicking Serial Monitor button at Arduino Environment software. Instruction; 1) Connect your arduino to your computer using USB cable A plug to
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Rotary Encoder Tutorial with Arduino Code int pulses, A_SIG=0, B_SIG=1; void setup(){ attachInterrupt(0, A_RISE, RISING); attachInterrupt(1, B_RISE, RISING); Serial.begin(115200); }//setup void loop(){ } void A_RISE(){ detachInterrupt(0); A_SIG=1; if(B_SIG==0) pulses++;//moving forward if(B_SIG==1) pulses–;//moving reverse Serial.println(pulses); attachInterrupt(0, A_FALL, FALLING); } void A_FALL(){ detachInterrupt(0); A_SIG=0; For more detail: Rotary Encoder Video Tutorial with Arduino Code
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The String case change functions allow you to change the case of a String. They work just as their names imply. toUpperCase() changes the whole string to upper case characters, and toLowerCase() changes the whole String to lower case characters. Only the characters A to Z or a to z are affected. Circuit There is
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This is a basic example how arduino works. In this arduino projects you’ll see how arduino control LED on for 1 second and off for 1 second repeatedly. Instruction; 1) Connect cathode lead of LED (shorter lead) to ground pin and anode lead of LED (longer lead) to pin 13. Upload this code to your
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You can add Strings together in a variety of ways. This is called concatenation and it results in the original String being longer by the length of the String or character array with which you concatenate it. The + operator allows you to combine a String with another String, with a constant character array, an
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When the button is pressed in this example, a text string is sent to the computer as keyboard input. The string reports the number of times the button has been pressed. Once you have the Leonardo programmed and wired up, open up your favourite text editor to see the results. NB: When you use the
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