Description

4-Digit 7-Segment LED Display – Common Cathode, Red, for Arduino, Clocks & DIY Electronics

🔢 Bright and Flexible Numeric Display Module for Counters, Timers & Readouts

This 4-digit 7-segment LED display module features a common cathode configuration and bright red LEDs, making it ideal for Arduino, Raspberry Pi, and microcontroller-based projects. Whether you’re building a digital clock, sensor readout, or electronic counter, this compact module delivers crisp, easy-to-read numeric output.

While it doesn’t include a built-in driver, it offers full manual control—allowing integration with shift registers like the 74HC595 or display driver ICs such as the MAX7219 for efficient multiplexing and display refreshing.

🔧 Key Features:

• 4 Digits + Decimal Points: Display numbers from 0000 to 9999 or show decimals (e.g., 12.34).

• Bright Red Display: High visibility with 14.2mm tall digits for clear readouts.

• Common Cathode: Easy control with shared ground lines per digit.

• DIY-Friendly Interface: No built-in controller—offers flexible wiring for full control.

• Low Power Operation: Works with 3V–5V DC systems (requires current-limiting resistors).

📊 Technical Specifications:

• Type: Common Cathode

• LED Color: Red

• Digit Height: 14.2mm

• Operating Voltage: 3V–5V DC

• Forward Voltage (Per Segment): ~1.8V

• Current per Segment: 20mA (max)

• Pin Count: 12 (4 cathodes, 8 segment/DP anodes)

• Dimensions: 50mm (L) × 19mm (W) × 10mm (H)

💡 Applications:

• ⏲️ Clocks & Timers – Countdown timers, stopwatches, alarms

• 📈 Sensor Readouts – Temperature, voltage, or humidity display

• 🧮 Counters – Track RPM, production units, or button presses

• 🎮 Scoreboards – Display scores for games and competitions

• 🔌 Power Meters – Visualize voltage or current in real time

⚙️ How to Use:

• Multiplexing: Rapidly switch cathode lines to display digits in sequence.

• With Shift Registers: Use a 74HC595 or MAX7219 for simplified control.

• Resistor Protection: Use 150–220Ω resistors for each segment to prevent overcurrent.

📦 Package Includes:

• 1× 4-Digit 7-Segment LED Display Module (Common Cathode)

Perfect for hobbyists, students, and engineers, this module is an affordable and flexible solution for building numeric display systems from scratch. Whether you’re designing a digital clock, data logger, or DIY voltmeter—this display has you covered.

Get yours today and bring your numbers to life! 🔴📟