The 0.56-inch Red 1-Digit 7-Segment Common Cathode LED Display is a standard electronic component used to display numbers from 0 to 9 and a few basic letters. In a common cathode (CC) configuration, all the negative terminals (cathodes) of the individual segment LEDs are tied together to a shared ground pin. To illuminate a specific segment, you must apply a high voltage (logic 1) to its corresponding positive terminal (anode). Technical SpecificationsThese parameters represent the industry-standard ratings for red 0.56″ displays (such as the popular 5161AS or 5611AH models):

• Character Height: 0.56 inches (14.2 mm)
• Emitting Color: Red
• Forward Voltage (\(V_{F}\)): 1.8V to 2.2V per segment
• Forward Current (\(I_{F}\)): 10mA to 20mA per segment (requires current-limiting resistors)
• Package Type: 10-pin Dual In-line Package (DIP) for breadboard or through-hole PCB mounting

Standard 10-Pin Layout & PinoutLooking directly at the front of the display with the decimal point at the bottom right, the pins are numbered 1 to 5 along the bottom (left to right) and 6 to 10 along the top (right to left / counter-clockwise).text — A — | | F B | | — G — | | E C | | — D — (DP)

(Note: Pins 3 and 8 are internally tied together. You only need to connect one of them to your circuit’s ground line to enable the display).