Seeeduino V4.2 (ATMega328P)

Seeeduino V4.2 is an Arduino-compatible board, which is based on Atemga328P MCU. There are so many Arduinos and Arduino-compatible boards in the world, and the Seeeduino V4.2 is one of the best Arduinos, Seeeduino V4.2 is generally more stable, easy-to-use and it's even good looking. Seeeduino V4.2 is based the Arduino UNO bootloader, and with an ATmega16u2 as a UART-to-USB converter, which means that the board ca basically work like a FTDI chip. You can program the board via a microUSB cable. Also, you can power the board using a DC Jack with 7V to 15V is acceptable. There's 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.

Features

• ATmega328 microcontroller
• Arduino UNO bootloader
• 14 Digital I/O Pins (6 PWM outputs)
• 6 Analog Inputs
• ISP Header
• Arduino UNO-R3 Shield Compatible
• microUSB programming and power supply
• 3 on-board Grove connectors
• 3.3/5V system operation power switch
• 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

Note

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.