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Running LED
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Input system that we use is the key / push button while the output is in the form of light. Please feel free to friends to make the design input output system using the Proteus software. First we connect button on A0 and A1. then we love 1k ohm resistor to Vcc on the push button. further connect the pins 13, 12, 10, 11 on the LED and resistor 220 ohm love. Here I attach proteus design for this system.
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Buzzer with Arduino
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design arduino pin 13 is connected to the 220 ohm resistor. of the resistor connected to the transistor 2N222A, then connected to the base. one leg is connected to ground and the other leg is connected to the buzzer. Furthermore buzzer connected to Vcc. To Buzzer please change of 12 volts to 5 volts.
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