This Uno R3 Arduino Compatible has more than 20 extra 3-Pin headers! No need for a stacked sensor shield or breadboard – directly plug sensors and servos into the board!
It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz ceramic resonator, a USB connection, a power jack, an ICSP header, and a reset button. It contains everything needed to support the microcontroller; Simply connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get started.
For convenience of wiring, we designed electronic brick 3pin interface corresponding to all 14 digital pins, 6 analog pins, 1 pin header for serial communication and 1 for IIC communication. It also has a toggle switch. When switched to 5V, level on serial communication port is 5V, voltage of pins is 5V; When switched to 3.3V, level on serial communication port is 3.3V, voltage of pins is 3.3V.
Microcontroller core: ATmega328P-pu
Working voltage: +5V
External input voltage: +7V~+12V(suggest)
External input voltage ( extremum ): +6V≤ Vin ≤ +20V
Digital signal I/O interface: 14 (of which 6 provide PWM output)
Analog signal input interface: 6
DCI/O interface current: 20mA
FlashMemory: 32KB (ATmega328) of which 0.5 KB used by bootloader
SRAM static storage capacity: 2KB
EEPROM storage capacity: 1K
Clock frequency: 16MHZ