Seeeduino V4.2(ATMega328P)

Features
ATmega328P microcontroller
Arduino UNO bootloader
14 Digital I/O Pins (6 PWM outputs)
6 Analog Inputs
ISP Header
Arduino UNO-R3 Shield Compatible
Micro USB programming and power supply
3 on-board Grove connectors
3.3/5V system operation power switch
Description
Seeeduino V4.2 is an Arduino-compatible board, which is based on ATmga328P MCU. Therere so many Arduinos and Arduino-compatible boards in the world, and we think that Seeeduino V4.2 is one of the best Arduinos, Seeeduino V4.2 is much more stable, easy-to-use and even good looking.
Seeeduino V4.2 is based on the Arduino UNO bootloader, and with an ATMEGA16U2 as a UART-to-USB converter, which means that the board can basically work like an FTDI chip. You can program the board via a micro-USB cable. Also, you can power the board via a DC Jack input, 7 to 15V is acceptable. Theres a switch to choose the system supply voltage, 3.3V or 5V, which is very useful if you want to set the system to 3.3V to save power.
We have dedicated our time to help you get started with this sensor quickly and easily. Try the example code to quickly get started with clear codes.
Finally, the three on-board Grove interface can make your board easily connect to the Grove modules.
Attention
Operating the chip at 16 MHz with 3.3 volts is beyond the specified maximum frequency "Safe Operating Area" for the ATmga328P chip. So when you switch the working voltage to 3.3V, it may not be safe. However, at room temperature, most chips work fine that way.
What is Grove
Grove makes it easier to connect, experiment, and simplify the prototyping process. No jumpers or soldering required. We have developed more than 300 Grove modules, covering a wide range of applications that can fulfill a variety of needs. Not only are these open hardware, but we also have open-source software.
Still feel confused about what is "Arduino" or what it exactly means? Check our comprehensive Arduino guide, then you will learn all about the Arduino from:
Introduction to Arduino ¨C What is it?
What can the Arduino do?
Why use the Arduino?
What is the difference between an Arduino and a Single Board Computer?
Arduino Hardware
Arduino Software
Types of Arduino
Getting started with the Arduino ¨C What do you need?
Other helpful resources

Technical details
Dimensions 115mm x78mm x25mm
Weight G.W 41g
Battery Exclude
3 on-board Grove connectors
DC Current per I/O Pin 40 mA
DC Jack Input 7v-12v
Flash Memory 32 KB
RAM 2 KB
EEPROM 1 KB
Clock Speed 16 MHz

Part List
Seeeduino V4.2 1