Datasheet

Then solder all 5 pins.

Now you are ready to wire it to your microcontroller. The required connections are:

"D" - I2C Data Pin (SDA)

"C" - I2C Clock Pin (SCL)

"+" - 5v. (Will not run on 3.3v!)

"-" - GND

"IO" - I2C bus voltage.

Due to the size of this display, there are 2 LEDs in series for each segment. Because of this, the display requires 5v to

run. It will not run on 3.3v.

For use with 3.3v processors, connect the IO pin to 3.3v. This will keep the I2C bus signals at a safe level for your

processor.

With 5v processors like the Arduino UNO, this pin can be connected to either 5v or 3.3v. (use 3.3v if there will be other

3.3v devices on the bus)