A 0.56-inch 1-digit 7-segment common cathode LED display is a compact electronic component used to display decimal numerals (0-9) and some letters. It consists of seven LED segments (labeled A to G) and an optional decimal point (DP), arranged to form a figure-8 pattern. In a common cathode configuration, all cathodes of the LED segments are connected together to a single pin, typically tied to ground, while each segment’s anode is individually controlled with a positive voltage to illuminate it.

Specifications:

• Size: 0.56-inch digit height, approximately 19mm x 12.6mm x 8mm (L x W x H).
• Color: Red,
• Forward Voltage: ~1.8V for red, 
• Forward Current: 10-20mA per segment for continuous operation; up to 100mA for pulsed/multiplexed modes.
• Pin Count: Typically 10 pins (7 segments + 1 decimal point + 2 common cathodes, e.g., pins 3 and 8).
• Pin Pitch: Standard 2.54mm for easy PCB mounting.
• Operating Temperature: -20°C to +85°C.
• Brightness: High brightness (e.g., 20,000 µcd at 10mA for red).
• Configuration: Common cathode, meaning segments are lit by applying a HIGH (logic 1) signal to the anode pins through a current-limiting resistor (e.g., 150Ω for red at 5V).

Features:

• Low Power Consumption: Energy-efficient, ideal for battery-powered devices.
• High Visibility: Bright, clear display for readability in various lighting conditions.
• Easy Integration: Compatible with microcontrollers like Arduino or Raspberry Pi, often driven by decoder ICs like CD4511 or 7447 for simplified control.
• Applications: Used in digital clocks, counters, voltmeters, and other numerical displays