for - Compatible with for R3 2560 Nano Robot for IDE AVR MCU Learner K53 for R3 is the latest easy-to-use open source controller launched in 2012. Compared with for , there is no major change in hardware. The biggest difference lies in the USB-to-serial circuit part, which uses an ATMega16U2 single-chip microcomputer. Improve, the software part is the same as before, no major changes. Pin changes: Two I2C pins are added next to the AREF pin (SDA and SCL, just a copy of Analog 4 and 5, not an additional I2C interface), in addition, two pins are also added next to RESET, one is IOREF, which can Let the expansion board adapt to the on-board voltage. This pin just tells the expansion board what the current on-board voltage is (for example, for is 5V, which can be regarded as a copy of the power pin, and does not provide level pull-up), and the other is for use. placeholder pins. More stable RESET circuit. The position of the RESET button has also changed, and it has been moved to the corner of the board near the USB interface, making it easier to press. NEW IMPROVEMENT: Clearly print on the female header connector, more precise and easier to use the wire. Control using ATMEGA328P chip 100% compatible with the official version ATmega16U2 replaces 8U2, this does not mean that R3 with 16K flash can make your code run faster, this update is for USB interface chip, theoretically it allows for to USB HID, such as MIDI/Joystick/ Keyboard. size:10.16 x 5.08 x 6.1 cm Material:ABS colour:Blue Package Contents: 1 x for R3 Development Board 1 x USB CABLE Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.