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Chapter2 Preparations
About Arduino uno r3
In "Hummer-bot", we used the Arduino uno r3 as the main control board, which has 14 digital input/output
pins (6 of which can be used as PWM output), 6 analog inputs, and a 16 MHz ceramic resonator, 1 USB
connection, 1 power socket, 1 ICSP head and 1 reset button. It contains everything that supports the
microcontroller; You just need to connect it to a computer via a USB cable or start with an AC-DC adapter
or battery.
Technical specifications:
Working voltage: 5V
Input voltage: USB powered or external 7V~12V DC input
Output voltage: 5V DC output and 3.3V DC output and external power input
Microprocessor: ATmega328 (Chip data sheet is in the documentation)
Bootloader：Arduino Uno
Clock frequency: 16 MHz
Support USB interface protocol and power supply (without external power supply)
Support ISP download function
Digital I/O port: 14 (4 PWM output ports)
Analog input port: 6
DC Current I/O Port: 40mA
DC Current 3.3V Port: 50mA
Flash memory: 32 KB (ATmega328) (0.5 KB for bootloader)
SRAM ：2 KB (ATmega328)
EEPROM：1 KB (ATmega328)
Size：75x55x15mm
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