ALLNET Brick'R'knowledge 7 Segment Display
The 7-segment display consists of 7 light bars and a dot. There is a light-emitting diode behind each.
The LEDs are controlled using two 8574T components (16 output lines to the LEDs).
The I2C address can be set with small switches on the back.
A maximum of four such devices can be operated on an I2C bus.
Product video