How to Use Pilot Lamp Yellon: Examples, Pinouts, and Specs

The Pilot Lamp Yellon is a small indicator light designed to visually signal the operational status of a device or system. This variant emits a yellow light, which is commonly used to indicate caution, warnings, or standby conditions. Its compact design and reliable performance make it a popular choice in industrial control panels, machinery, and consumer electronics.

• Industrial Control Panels: Indicates machine status or fault conditions.
• Consumer Electronics: Serves as a power or standby indicator.
• Automotive Systems: Used in dashboards to signal warnings or alerts.
• Home Appliances: Provides visual feedback for operational states.
• Test Equipment: Highlights active or inactive states during diagnostics.

1. Determine the Operating Voltage: Ensure the power supply matches the lamp's operating voltage (12V DC).
2. Prepare the Mounting Hole: Drill an 8mm hole in the panel or enclosure where the lamp will be installed.
3. Connect the Terminals:
   • Attach the positive terminal of the power supply to the Positive (+) pin.
   • Attach the ground (negative terminal) to the Negative (-) pin.
4. Secure the Lamp: Insert the lamp into the mounting hole and tighten the securing nut.
5. Test the Circuit: Power on the system to verify the lamp illuminates correctly.

• Polarity: Ensure correct polarity when connecting the lamp to avoid damage.
• Voltage Regulation: Use a regulated 12V DC power supply to prevent overvoltage.
• Heat Dissipation: Avoid placing the lamp near heat-sensitive components, as prolonged operation may generate slight heat.
• Environmental Conditions: Ensure the lamp is not exposed to moisture or extreme temperatures beyond its operating range.

The Pilot Lamp Yellon can be used with an Arduino UNO to indicate the status of a digital output pin. Below is an example circuit and code:

• Connect the Positive (+) pin of the lamp to a 220-ohm resistor, and then to Arduino pin 13.
• Connect the Negative (-) pin of the lamp to the Arduino GND.

// Pilot Lamp Yellon Example with Arduino UNO
// This code toggles the lamp on and off every second.

const int lampPin = 13; // Pin connected to the lamp's positive terminal

void setup() {
  pinMode(lampPin, OUTPUT); // Set the lamp pin as an output
}

void loop() {
  digitalWrite(lampPin, HIGH); // Turn the lamp ON
  delay(1000);                // Wait for 1 second
  digitalWrite(lampPin, LOW);  // Turn the lamp OFF
  delay(1000);                // Wait for 1 second
}

1. Can the Pilot Lamp Yellon operate on AC power?
   No, this lamp is designed for 12V DC operation only. Using AC power may damage the component.

2. What resistor value should I use if connecting to a higher voltage?
   Use Ohm's Law to calculate the resistor value:
   ( R = \frac{V_{supply} - V_{lamp}}{I_{lamp}} )
   For example, with a 24V supply:
   ( R = \frac{24V - 12V}{0.02A} = 600 , \Omega ).

3. Can the lamp be used outdoors?
   The lamp is not waterproof. Use it in a dry, indoor environment or within a sealed enclosure for outdoor applications.