### Overview of ND3FR16H-R The **ND3FR16H-R** is a specific type of **DIP Rotary Switch** manufactured by NKK Switches. It is a compact, PCB-mounted component used to set parameters or select addresses in electronic circuits. --- ### Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Manufacturer** | NKK Switches | | **Logic Type** | Hexadecimal (0-F) | | **Number of Positions** | 16 Positions | | **Output Code** | Real Code | | **Actuator Type** | Screwdriver Slotted (Flatted) | | **Mounting Type** | Through-Hole (Right Angle) | | **Contact Rating** | 100mA @ 5V DC | | **Operating Temperature** | -25°C to +85°C | --- ### Detailed Part Analysis #### 1. Functionality The switch functions as a digital encoder. By rotating the dial, it opens and closes a combination of four internal contacts. These contacts correspond to binary-weighted values (1, 2, 4, 8), allowing the device to output a **Hexadecimal code** ranging from 0 to 15 (0 through F). #### 2. Structural Features * **Right Angle Orientation:** The "H" in the part number signifies a horizontal (right-angle) mount, meaning the dial is accessible from the side of the PCB rather than the top. * **Sealed Construction:** The ND3 series is typically process-sealed, meaning it can withstand automated soldering and washing processes without internal contamination. * **Gold Contacts:** It utilizes gold-plated contacts to ensure high reliability and prevent oxidation, which is critical for low-voltage logic signals. #### 3. Common Applications * **Address Setting:** Assigning unique IDs to devices on a BUS (like RS-485 or CAN bus). * **Mode Selection:** Choosing between different operational programs in an embedded system. * **Configuration:** Setting hardware parameters on industrial controllers without needing a digital interface. --- ### Logic Table (Real Code) | Position | Binary Output (1-2-4-8) | Hex Character | | :--- | :--- | :--- | | 0 | 0000 | 0 | | 1 | 1000 | 1 | | ... | ... | ... | | 9 | 1001 | 9 | | 10 | 0101 | A | | 15 | 1111 | F | --- ### Example Schematic Connection ```cpp // Logic representation for reading the switch int pin1 = digitalRead(BIT_1); int pin2 = digitalRead(BIT_2); int pin4 = digitalRead(BIT_4); int pin8 = digitalRead(BIT_8); int hexValue = pin1 + (pin2 * 2) + (pin4 * 4) + (pin8 * 8); ```