Keyestudio UNO R3 Official Upgraded Version with Pin Header Interface for Arduino DIY
The Keyestudio UNO with pin header interface is a microcontroller board based on the ATmega328 microcontroller. It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz ceramic resonator, a USB-B port, a power jack, an ICSP header and a reset button. It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with an AC-to-DC adapter or battery to get started.
For convenience of wiring, we designed electronic brick 3pin interface corresponding to all 14 digital pins, 6 analog pins, 1 pin header for serial communication and 1 for I²C communication. It also has a toggle switch. When switched to 5V, level on serial communication port is 5V, voltage of pins is 5V. When switched to 3.3V, level on serial communication port is 3.3V, voltage of pins is 3.3V.