1. Pin of changes: next to the AREF pin both I2C-pin (SDA and SCL, just Analog 4 and 5 of the copy, not the additional I2C interface), plus the two next to the RESET pin, one IORE fallow expansion board voltage on board, this pin expansion board
just told the on board voltage (such as UNO 5V, can be seen as the power pins copy, does not provide the level pull), the other is later Scratch placeholder pin.
2. More stable RESET circuit. The RESET key position has changed, which has been moved to the corner near the USB interface board, more convenient and press.
3. The ATmega16U2 instead 8U2, and that does not mean that the 16K flash of UNO R3 make your code run faster, this update is a service of the USB interface chip,
theoretically it UNO can simulate USB the HID, such as MIDI / Joystick / Keyboard.
Operating Voltage: 5V
Input Voltage (recommended): 7-12V
Digital I/O Pins: 14 (of which 6 PWM output)
Analog Input Pins: 6
DC Current per I/O Pin: 40 mA
DC Current for 3.3V Pin: 50 mA
Flash Memory: 32 KB (ATmega328) of which 0.5 KB used by bootloader
SRAM: 2 KB
EEPROM: 1 KB
Clock Speed: 16 MHz
1 x UNO R3 Development Board
1 x USB Cable
WORK AS ORIGINAL: perfectly compatible with arduino, the same circuit arrangement of the original
FAST TRANSFER AND MORE MEMORY: USB-TTL used ATMEGA 16U2 chip, controller used ATMEGA 328P chip（US ATMEL original）
EXCELLENT QUALITY: solder is very clean, everything is aligned nicely, all boards will make function,voltage, current testing before packaging, a booklet, video and web page tutorial help to use it
BEAUTIFUL LOOK & PACKAGING: cool yellow-black design which is a departure from the standard, dull, black boards, the yellow silk screen on black mask make it easy to read the pin labels
FCC and CE CERTIFICATION: this board made from environmentally friendly components and materials, as well as environmentally friendly production technology, it is really safe
Keyestudio UNO R3 ATmega328P Development Board with USB Cable Compatible With Arduino UNO R3
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