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UNO R3 CH340G ATMEGA328P Development Board :
The Uno R3 CH340G ATmega328p Development Board is the low-cost version of the popular Uno R3 Arduino. It is assembled with the CH340 USB to Serial converter chip, instead of using an Atmega16U2 chip. During normal operation, this board is identical to the more expensive version without CH340 chip.
We have used plenty of these low-cost Arduino boards with CH340 chips, and have found them to work perfectly. The only time the CH340 chip is used is during programming and when using the serial output of the USB port.
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- Microcontroller: The Arduino Uno SMD is based on the Atmel ATmega328P microcontroller.
- Clock Speed: The microcontroller typically runs at 16 MHz.
- Digital I/O Pins: It has a total of 14 digital input/output pins, where a subset can be configured as PWM (Pulse Width Modulation) outputs.
- Analog Input Pins: There are 6 analog input pins.
- UART, I2C, and SPI Communication: The Arduino Uno SMD supports serial communication (UART), I2C, and SPI protocols, making it versatile for interfacing with other devices.
- Flash Memory: The ATmega328P microcontroller has 32 KB of Flash memory for storing the user's program.
- SRAM: It has 2 KB of SRAM for runtime data storage.
- EEPROM: There is 1 KB of EEPROM available for non-volatile data storage.
- Power Supply: The board can be powered through a USB connection or an external power supply. It operates at 5V.
- Input Voltage: The recommended input voltage range is 7-12V.
- Current per I/O Pin: The pins can source or sink a maximum of 20 mA.
- Reset Button: There is a reset button for restarting the microcontroller.
- LEDs: The board typically includes a built-in LED on pin 13, which is often used for simple visual feedback.
- Form Factor: The Arduino Uno SMD has a standard Arduino Uno form factor.
- Programming: It can be programmed using the Arduino IDE through a USB connection.
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