## Technical Overview: FYA-R220101ZX-4 The **FYA-R220101ZX-4** is a specific electronic component typically identified as a **Single Digit, 7-Segment LED Display**. Manufactured by companies like *FORYARD Optoelectronics*, this part is designed for numeric output in electronic circuits. ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Digit Height** | 2.20 Inches (55.80 mm) | | **Type** | 7-Segment LED (Single Digit) | | **Polarity** | Common Anode (typically) | | **Emitted Color** | Super Bright Red (usually denoted by "R") | | **Surface Color** | Black face with White segments | | **Forward Voltage ($V_f$)** | ~1.8V to 2.2V per LED | | **Operating Current** | 20mA (Recommended) | --- ### 2. Physical Structure and Dimensions This component is considered a "Large Format" display. Due to its size (2.2 inches), each segment is not powered by a single LED chip but rather multiple LED chips connected in series inside each segment. * **Segment Count:** 7 segments (A-G) plus a Decimal Point (DP). * **Pin Configuration:** Usually features a Dual-In-Line (DIP) pin arrangement for through-hole PCB mounting. * **Size Impact:** Because segments are in series, the required driving voltage is higher than a standard small display (often requiring 8V-10V for the segments, while the DP remains ~2V). --- ### 3. Pinout Logic (Common Anode) In a **Common Anode** configuration, all the positive sides (Anodes) of the LEDs are tied together to a single pin. To light a specific segment, you must connect the corresponding Cathode pin to ground (GND) through a current-limiting resistor. ```text A --- F | | B -G- E | | C --- . DP D ``` --- ### 4. Circuit Implementation Tips * **Current Limiting:** Never connect this display directly to a power source. Use resistors to prevent burnout. * **Driver ICs:** It is commonly used with ICs like the **74HC595** (Shift Register) or **MAX7219** (LED Driver) to save microcontroller pins. * **Voltage Note:** Ensure your power supply can handle the forward voltage drop of the series LEDs in the 2.2" segments. ---