for - Compatible with for R3 2560 Nano Robot for IDE AVR MCU Learner K53for 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 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 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 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 ATMEL ATMEGA328P chip100% compatible with the official versionATmega16U2 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 simulate USB HID, such as MIDI/Joystick/ Keyboard.size:10.16 x 5.08 x 6.1 cmMaterial:ABScolour:BluePackage Contents:1 x for R3 Development Board1 x USB CABLEOnly 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.