Dot Matrix LED Display Red 3mm Column Cathode - (AD3770)

Description:

Basically, to control a matrix, you connect its rows and columns to your Arduino board. The columns are connected to the cathodes of the LEDs, so a column must be LOW for any of the LEDs in that column to turn on. The rows are connected to the anodes of the LEDs, so the row must be HIGH for an individual LED to turn on. If both the row and the column are HIGH or LOW, no voltage flows through the LED and it does not light up. To control an individual LED, set its column to LOW and its row to HIGH. To control multiple LEDs in a row, set the row HIGH, then take the column HIGH, then set the columns LOW or HIGH as appropriate; a LOW column will turn on the corresponding LED and a HIGH column will turn it off. Pins set to OUTPUT using the PinMode command are set to LOW if not otherwise specified.

Specifications:

- RoHS

- Emitted color: Red

- Type: Row Anode, Column Cathode

- Wavelength: 625 - 630nm

- Forward Voltage: 2.1 - 2.5V

- Forward Current: 20mA

- Dimensions: 32mm x 32mm x 8.0mm

Reference link