1-Digit 7-Segment Common Cathode LED Display (RED)

Product Overview

The 1-Digit 7-Segment Common Cathode LED Display is a compact, single-digit numeric display used in counters, clocks, timers, meters, and many DIY and embedded projects. It contains seven individual LED segments labeled a through g arranged to form the digit 8. By selectively powering segments, you can display numbers 0 to 9 and several alphabetic characters. The common cathode configuration ties all segment cathodes to a single ground pin, making it straightforward to drive from microcontrollers and typical driver ICs.

Why choose this 1-digit 7-segment common cathode display?

• Simple common cathode wiring for direct microcontroller control or driver IC use
• Bright, clear red illumination with low power consumption and long life
• Standard through-hole 10-pin DIP package for easy prototyping and PCB mounting
• Compatible with Arduino, ESP32, Raspberry Pi, PIC, and popular driver ICs like 4026 and 4511

Key Features

• Compact 1-digit 7-segment LED display in common cathode configuration
• 7 segments plus optional decimal point (DP)
• Low power, solid-state construction for long lifespan
• Wide viewing angle and bright red digits (standard color)
• Easy interfacing with microcontrollers, transistors, or dedicated driver ICs

Specifications

• Type: 1-digit 7-segment LED display
• Configuration: Common cathode
• Digit count: 1
• Segment count: 7 (plus optional decimal point)
• Pin count: 10 pins (standard DIP)
• Color: Red (standard; other colors may be available by model)
• Operating voltage (per segment): ~1.8V to 2.2V (typical for red)
• Forward current (per segment): 10mA to 20mA
• Digit height: ~0.36 to 0.56 inches (varies by model)
• Package size: Standard 5mm pitch DIP package
• Viewing angle: Wide, clear visibility
• Mounting: Through-hole

Pinout and Wiring Tips

In a common cathode 7-segment display, all cathode pins are connected to ground. Each anode controls one segment and should be driven through a current-limiting resistor from your microcontroller or driver. Typical wiring steps:

• Connect the common cathode pin(s) to GND.
• Connect each segment anode (a, b, c, d, e, f, g, DP) to a microcontroller pin or driver output through a resistor.
• Choose resistor values to set segment current: R = (Vcc – Vf) / I. Example: for 5V supply, Vf~1.9V, I = 10mA, R ≈ (5 – 1.9) / 0.01 = 310 ohms. Use 330 ohms for safe operation.

Driving Options

• Direct drive from microcontroller GPIO pins (use resistors and ensure current limits are respected)
• Use driver ICs such as 4026, 4511, or 7447 for simplified counting and multiplexing
• Use NPN transistor or MOSFET arrays for higher current or multiplexed multi-digit displays
• For low-pin-count control, consider shift registers or LED driver ICs with current limiting

Applications

• Digital clocks and timers
• Counter circuits and scoreboards
• Calculators and measurement displays (voltmeters, frequency meters)
• Arduino, ESP32, Raspberry Pi, and PIC learning projects
• Embedded systems, DIY electronics, and student engineering projects

Mounting and Packaging

This 1-digit 7-segment common cathode display is supplied in a standard through-hole 10-pin DIP package for simple PCB insertion or breadboard prototyping. Check digit height and pin arrangement for your model when planning mounting or enclosures.

Ordering Notes

Images and sample units are for illustration purposes only. Actual product color, digit height, brightness, or pin arrangement may vary slightly between batches or manufacturers. Contact your supplier for specific model variants or color options.