The **TCS-53-R/BL** is a specialized electronic component, typically classified as a **bi-color LED indicator** or a **tactile switch assembly with integrated LED lighting**. These parts are frequently used in control panels, instrumentation, and professional audio/visual equipment. Below is the technical breakdown of its electronic characteristics. --- ### 1. General Specifications The part number suffix typically denotes the color and physical configuration: * **R/BL:** Red / Blue (Bi-color). * **TCS:** Tactile Control Switch series. | Parameter | Technical Detail | | :--- | :--- | | **Component Type** | SPST (Single Pole Single Throw) Momentary Switch | | **Integrated LED** | Red & Blue Bi-color LED | | **Mounting Type** | Through-hole (PCB Mount) | | **Operating Force** | Typically 160gf to 250gf | | **Contact Rating** | 12V DC, 50mA | --- ### 2. LED Electrical Characteristics Because this is a bi-color component, the LED pins are separate from the switch contacts. You must use current-limiting resistors to prevent burnout. | LED Color | Forward Voltage ($V_f$) | Forward Current ($I_f$) | Luminous Intensity | | :--- | :--- | :--- | :--- | | **Red** | 1.8V - 2.2V | 20mA | ~100-200 mcd | | **Blue** | 3.0V - 3.4V | 20mA | ~150-300 mcd | --- ### 3. Pin Configuration and Circuitry The device generally features a 4 or 6-pin layout. The internal schematic is divided into two functional blocks: #### A. The Switch Block * **Action:** Normally Open (NO). * **Circuit:** Two pins are connected internally when the button is pressed. * **Bounce Time:** Usually <10ms (requires software debouncing). #### B. The LED Block (Common Anode or Cathode) * **Common Pin:** Shared ground or positive leg. * **Control Pins:** Individual legs for the Red and Blue diodes. * **Mixing:** By powering both pins simultaneously via PWM (Pulse Width Modulation), you can achieve a "Purple/Magenta" hue. --- ### 4. Application Use Cases * **Status Indicators:** Red for "Error/Off," Blue for "Ready/On." * **User Interface:** Providing tactile feedback to a user while visually confirming a mode change. * **Network Equipment:** Reset switches that glow to indicate link activity. --- ### 5. Recommended Connection Code (Arduino Example) ```cpp // Example: Turning on the Blue LED when the switch is pressed const int switchPin = 2; const int blueLedPin = 3; void setup() { pinMode(switchPin, INPUT_PULLUP); pinMode(blueLedPin, OUTPUT); } void loop() { int state = digitalRead(switchPin); if (state == LOW) { // Switch is pressed digitalWrite(blueLedPin, HIGH); } else { digitalWrite(blueLedPin, LOW); } } ```