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USB
10
Connection
CP2102
11
12
TX LED
RX LED
13
Crystal
14
Oscillator
Arduino board can be powered via USB
All you needed to do is connecting the USB
port to PC using a USB cable.
USB serial chip, translate the USB signal of
computer into serial signal
Onboard you can find the label: TX
When Arduino board communicates via
serial port, send the message, TX led
Onboard you can find the label:
RX(receive )
When Arduino board communicates via
serial port, receive the message, RX led
How does Arduino calculate time? by using
a crystal oscillator.
The number printed on the top of the
Arduino crystal is 16.000H9H. It tells us that
the frequency is 16,000,000 Hertz or
connector.
(transmit)
flashes.
flashes.
16MHz.
70
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