## CD16RL1CK-R Electronic Component Overview The **CD16RL1CK-R** is a specific model of a **Rotary Coded Switch**, typically manufactured by companies like C&K (now part of Littelfuse). These switches are used to convert rotational position into a binary-coded output. --- ### 1. Key Technical Specifications | Feature | Specification | |:---|:---| | **Component Type** | Rotary Coded Switch | | **Code Type** | Real Binary Coded Decimal (BCD) | | **Number of Positions** | 16 Positions (Hexadecimal 0-F) | | **Mounting Type** | Through-Hole, Right Angle | | **Actuator Style** | Flush / Screwdriver slot | | **Contact Rating** | 0.4 VA @ 20V AC or DC (Logic Level) | | **Operating Temp** | -25°C to 85°C | --- ### 2. Functional Description The "CD" series refers to a subminiature size designed for space-constrained PCB designs. The breakdown of the part number functions as follows: * **CD16**: Indicates a 16-position (Hexadecimal) switch. * **RL1**: Refers to the "Right Angle" orientation, meaning the actuator is perpendicular to the solder pins. * **CK**: Designates the specific terminal and actuator style (usually gold-plated contacts for high reliability). * **R**: Indicates the output is "Real" code (as opposed to "Complement" code). #### How it Works: As the user rotates the dial, internal metal wipers connect the common pin to a specific combination of four output pins (1, 2, 4, and 8). * **Position 0**: All outputs open. * **Position 5**: Pins 1 and 4 are closed to common ($1+4=5$). * **Position F (15)**: All pins (1, 2, 4, 8) are closed to common ($1+2+4+8=15$). --- ### 3. Pinout Configuration Though designs vary slightly by manufacturer, the standard 16-position BCD footprint follows this logic: ```text Pin 1: Bit 1 (Value 1) Pin 2: Bit 2 (Value 2) Pin 3: Common (C) Pin 4: Bit 4 (Value 4) Pin 5: Bit 8 (Value 8) ``` --- ### 4. Common Applications * **Address Setting**: Defining unique IDs for devices on a communication bus (like RS-485 or CAN). * **Mode Selection**: Choosing between different firmware operational modes in embedded systems. * **Industrial Controls**: Setting timer values or hardware configurations without needing a digital display.