The **MV66V3AD-R** is a specific electronic component typically identified as a **High-Intensity Visible LED** or a **Photo-sensor component**, often manufactured by companies like **Everlight** or **Sharp** (depending on the specific series prefix). In most industrial contexts, this part number refers to a **Red LED** designed for signaling or high-visibility indicators. --- ### 1. Key Technical Specifications The following table summarizes the typical electrical and optical characteristics for this component class: | Parameter | Typical Value | Unit | | :--- | :--- | :--- | | **Color** | Red | - | | **Wavelength ($\lambda_p$)** | 630 - 660 | nm | | **Forward Voltage ($V_f$)** | 1.8 - 2.4 | V | | **Forward Current ($I_f$)** | 20 | mA | | **Luminous Intensity** | 100 - 500 (varies by bin) | mcd | | **Viewing Angle** | 30 - 60 | Degrees | | **Operating Temperature** | -40 to +85 | °C | --- ### 2. Physical Characteristics * **Package Type:** Usually a **T-1 3/4 (5mm)** through-hole package. * **Lens Type:** Water clear or red diffused (the "R" suffix often denotes the Red color or RoHS compliance). * **Mounting:** Through-hole technology (THT). --- ### 3. Pinout Configuration For standard LEDs like the MV66V3AD-R, the polarity is determined as follows: ```markdown (Anode) + ----| |---- - (Cathode) | | [ LED ] |_| / \ Long Leg Short Leg ``` 1. **Anode (+):** The longer lead. 2. **Cathode (-):** The shorter lead, usually marked by a flat edge on the plastic LED housing. --- ### 4. Typical Applications * **Status Indicators:** Power ON/OFF lights for consumer electronics. * **Instrumentation:** Backlighting for buttons and switches. * **Automotive:** Internal dashboard lighting or indicator lamps. * **DIY Electronics:** Compatible with Arduino/Raspberry Pi logic levels (when used with a current-limiting resistor). --- ### 5. Recommended Circuit Diagram To prevent burning out the LED, a current-limiting resistor ($R$) is required. ```cpp [Vcc (+5V)] --- [Resistor (220Ω)] --- [Anode] LED [Cathode] --- [GND] ``` *Calculation: $R = (V_{source} - V_f) / I_f$* *Example: $(5V - 2V) / 0.02A = 150\Omega$ (Minimum)*