7 segment 4 digit display 0.5-inch Common Cathode
The 0.5-inch 4-Digit Common Cathode Red 7-Segment Display is a numeric LED module for showing multi-digit information. Digit height 0.5 inches (12.7mm) provides excellent readability. Common cathode configuration allows segment control by applying positive voltage to anodes. Module dimensions: 30mm × 15mm. Ideal for digital clocks, voltmeters, frequency counters, and temperature displays. Compatible with driver ICs like MAX7219 or TM1637.
شاشة العرض ذات 4 أرقام بحجم 0.5 بوصة، الكاثود المشترك هي وحدة LED رقمية لعرض المعلومات متعددة الأرقام. ارتفاع الرقم 0.5 بوصة (12.7 مم) يوفر قراءة ممتازة. تكوين الكاثود المشترك يسمح بالتحكم في الشرائح بتطبيق جهد موجب على الأنودات. أبعاد الوحدة: 30 مم × 15 مم. مثالية للساعات الرقمية ومقاييس الجهد وعدادات التردد وشاشات الحرارة. متوافقة مع دوائر القيادة مثل MAX7219 أو TM1637.
The 0.5-inch 4-Digit 7-Segment Display is a multi-digit LED module designed to display numeric information (0-9) and select hexadecimal characters (A-F) across four digits. Each digit has a height of 0.5 inches (12.7 mm), providing clear visibility from a distance while remaining compact enough for panel meters and instrumentation. This display uses a common cathode configuration, meaning the cathodes (negative terminals) of all segments within each digit are connected together. To light a segment, the anode pin is driven high (positive voltage) while the common cathode of the desired digit is pulled low. This configuration is straightforward to drive with microcontrollers using multiplexing techniques or dedicated LED driver ICs. The overall module measures approximately 30mm in length and 15mm in height (typical for 4-digit 0.5-inch displays), with a standard 12-pin DIP layout (often 6 pins on each side). Each segment typically operates at 1.8V–2.2V forward voltage and 10mA–20mA forward current. The display is made of high-intensity red LED chips, encapsulated in a compact plastic package with a black face for high contrast. It is widely used in digital clocks, multimeters, timers, and any application requiring multi-digit numeric output.
Specifications
| Parameter | Value |
|---|---|
| Display type | 4-Digit 7-Segment LED |
| Digit height | 0.5 inch (12.7 mm) |
| Configuration | Common Cathode |
| Color | Red |
| Module dimensions | Approx. 30mm × 15mm (L × H) |
| Pin count | Typically 12 pins (6 per side) |
| Forward voltage (per segment) | 1.8V – 2.2V (typical) |
| Forward current (per segment) | 10mA – 20mA |
| Peak current | 30mA (max) |
| Operating temperature | -25°C to +85°C |
| Package type | DIP through-hole with black face |
| Decimal point | Each digit includes a right-hand decimal point |
Applications
Digital clocks and alarm clocks – Display hours and minutes (12-hour or 24-hour format)
Digital voltmeters and ammeters – Show measured voltage or current values up to 9999
Frequency counters and function generators – Numeric readout of frequency or period
Temperature displays – Show temperature with one decimal place (e.g., 23.5°C)
Countdown and stopwatch timers – Display minutes and seconds or seconds and tenths
Programmable counters – Count products, people, or events with 4-digit capacity
Panel meters for industrial equipment – Show process variables like pressure, flow, or RPM
Arduino and Raspberry Pi projects – Multi-digit numeric output using multiplexing
Calculator and cash register displays – Vintage-style numeric readouts