7-Segment Display – CC Red COM53 ,R15

DescriptionBefore the era of OLED screens and LCD panels, the 7-segment display was the undisputed king of numerical output, and it remains a staple in hardware design today due to its high visibility and extreme reliability.Whether you are designing a rugged, high-contrast dashboard for an industrial IoT node, or teaching students how to count in binary during the Electronics Bootcamp, this Common Cathode 7-Segment Display is an essential educational and prototyping tool.Understanding Common CathodeA 7-segment display is simply a package of eight individual LEDs (seven for the number segments A-G, and one for the decimal point). In a Common Cathode display, the negative ground pins (Cathodes) of all eight LEDs are tied together internally to a single common pin.To light up a specific segment, you connect the common pin to Ground (GND), and apply a positive voltage (HIGH) to the corresponding segment pin. This makes it incredibly intuitive to program using standard digitalWrite(pin, HIGH) commands on a microcontroller.The Golden Rule: Always Use Resistors!Just like any standard LED, you cannot connect the segment pins directly to a 5V or 3.3V power source without protection. Doing so will instantly burn out the internal LEDs. You must place a current-limiting resistor (typically 220Ω or 330Ω) in series with each individual segment pin you plan to use.The Perfect Pair: CD4511 DecoderIf you want to save pins on your microcontroller, this Common Cathode display is the exact type required to work with the CD4511 BCD to 7-Segment Decoder IC. By pairing these two components, you can display any number from 0 to 9 using only 4 digital pins from your Arduino, rather than wasting 7 or 8!Key Features:High Contrast: The grey face with white diffused segments ensures the lit LEDs stand out clearly, even in bright environments.Breadboard Ready: Features standard 2.54mm (0.1″) pin spacing, easily bridging the center gap on standard prototyping breadboards.Decimal Point (DP): Includes a right-hand decimal point for displaying precise sensor data (like temperatures or voltages).Technical Specifications:Digit Count: 1 DigitPolarity: Common CathodeEmitting Color: RedForward Voltage (VF): ~1.8V to 2.2V per segmentContinuous Forward Current (IF): ~20mA per segment (Recommended 10mA – 15mA)Number of Pins: 10 (2 Common Cathode pins, 8 Segment pins)Ideal Applications:Basic digital clocks, stopwatches, and tally countersHigh-visibility sensor readouts (voltage, temperature, speed)Interfacing with 74HC595 shift registers or CD4511 decoder ICsFundamental electronics education and logic design labs