Some beginner-friendly Arduino Uno projects you can get started with include an ultrasonic piano, ... and their A4 and A5 pins both double as SDA and SCL pins for I2C/TWI communication.

We powered the sensor stick using the 5 volts out available on the Arduino Uno. I2C also requires pull-up resistors on the data (SDA) and clock (SCL) buses. We used two pull up resistors soldered ...

and additional SDA and SCL pins. Since the discontinuation of the original and Rev2 boards, the Rev3 has become the face of the Uno family and the Arduino brand in general. In fact, it's ...

This is a useful addition to my previous article “Arduino EEPROM ... for multiple device operation. Likewise, the SCL pin is the serial clock line and the SDA pin is the serial data line. The clock ...

Two 10k pull up resistor s are at the SDA and SCL pins. This is due to the reason that DS1307 communicates through I2C interface. SDA – Arduino pin A4; SCL ... I uploaded the below coding to my ...