Arduino Nano Adapter. Suitable for all Arduino boards that have the pin layout of the Arduino Nano. With Arduino 9V supply voltage. Following Anschlüsse are available: I²C SCL / SDA 3.3V and 5V switchable. A0-A3, A6, A7 (Analog A and Outputs) Rx, TX (Serial Connection) PD2-PD7 (Digital One and Outputs) MOSI, SCK, B1, SS, MISO, B0 (SPI Serial Peripheral Interface)