![]() ![]() It has 54 digital input/output pins (of which 15 can be used as PWM outputs), 16 analog inputs, 4 UARTs (hardware serial ports), a 16 MHz crystal oscillator, a USB connection, a power jack, an ICSP header, and a reset button. The Arduino Mega 2560 is a microcontroller board based on the ATmega2560.But now my Arduino Uno is not shown in the Port, but it is connected with my laptop and the power Led in Arduino is ON, how to solve this problem? I am using Arduino UNO, by mistake A0 analog pin is got connected with 15V AC for few seconds, then my laptop got off, I disconnected everything. ![]() Arduino operates on a 0–5 volts range, it is 5/1023=0.00488volts or 4.88mV. An Analog to Digital converter works roughly in three stages – sampling, quantization and digitization. Arduino UNO has a 10 bit Analog to Digital converter to do that job. ![]()
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