If this is your first experience tinkering with the platform, the UNO is the most robust board you can start playing with. Arduino Uno SMD Overview The Arduino Uno SMD is a version of the Arduino Uno, but uses an surface mount version of the Atmega328P instead of the through-hole version. The UNO is the best board to get started with electronics and coding. Instead, it features the Atmega16U2 programmed as a USB-to-serial converter. The Uno R3 differs from all preceding boards in that it does not use the FTDI USB-to-serial driver chip. The classic Nano is the oldest member of the Arduino Nano family boards. The Arduino Nano comes with pin headers that allow for an easy attachment onto a breadboard and features a Mini-B USB connector. Note that the two ICSP headers are separately used to program the firmware to ATMEGA16U2-MU and ATMEGA328P-PU, but generally the two chips have been programmed well. The Arduino Nano is Arduinos classic breadboard friendly designed board with the smallest dimensions. 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. It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz quartz crystal, a USB connection, a power jack, 2 ICSP headers and a reset button. Arduino from Scratch Part 13 Full Arduino Uno R3 Schematic and BOM. Keyestudio Uno R3 is a microcontroller board based on the ATmega328 (datasheet), fully compatible with ARDUINO UNO REV3. Datasheet Description ATMEL Corporation ATMEGA328P 420Kb 26P 8-bit Microcontroller.
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