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Raspberry Pi Zero W Controlled Multi-Color LED Indicator

Image of Raspberry Pi Zero W Controlled Multi-Color LED Indicator

Circuit Documentation

Summary

The circuit in question is designed to interface a Raspberry Pi Zero W with three LEDs (red, green, and yellow) through individual resistors. Each LED is connected to a GPIO pin on the Raspberry Pi Zero W and shares a common ground. The resistors are used to limit the current to the LEDs to prevent damage. This simple setup could be used for status indication or simple signaling in a larger system.

Component List

Raspberry Pi Zero W

  • Description: A low-cost, compact version of the Raspberry Pi with wireless LAN and Bluetooth connectivity.
  • Pins: 5V, 3V3, multiple GPIOs, Ground, CSI for camera module, etc.
  • Purpose: Acts as the central controller for the circuit, capable of driving the LEDs via GPIO pins.

LED: Two Pin (Red)

  • Pins: Anode, Cathode
  • Purpose: Serves as a visual indicator when powered.

LED: Two Pin (Green)

  • Pins: Anode, Cathode
  • Purpose: Serves as a visual indicator when powered.

LED: Two Pin (Yellow)

  • Pins: Anode, Cathode
  • Purpose: Serves as a visual indicator when powered.

Resistor (220 Ohms)

  • Pins: Pin1, Pin2
  • Properties: Resistance value of 220 Ohms
  • Purpose: Limits the current to the LEDs to prevent damage.

Wiring Details

Raspberry Pi Zero W

  • GPIO 23: Connected to the anode of the red LED through a 220 Ohm resistor.
  • GPIO 24: Connected to the anode of the green LED through a 220 Ohm resistor.
  • GPIO 25: Connected to the anode of the yellow LED through a 220 Ohm resistor.
  • GND: Common ground for all LEDs.

LED: Two Pin (Red)

  • Anode: Connected to GPIO 23 on the Raspberry Pi Zero W through a 220 Ohm resistor.
  • Cathode: Connected to the common ground (GND) on the Raspberry Pi Zero W.

LED: Two Pin (Green)

  • Anode: Connected to GPIO 24 on the Raspberry Pi Zero W through a 220 Ohm resistor.
  • Cathode: Connected to the common ground (GND) on the Raspberry Pi Zero W.

LED: Two Pin (Yellow)

  • Anode: Connected to GPIO 25 on the Raspberry Pi Zero W through a 220 Ohm resistor.
  • Cathode: Connected to the common ground (GND) on the Raspberry Pi Zero W.

Resistor (220 Ohms)

  • One end (Pin1): Connected to the anode of the corresponding LED.
  • Other end (Pin2): Connected to the respective GPIO pin on the Raspberry Pi Zero W.

Documented Code

No code has been provided for the microcontrollers in the circuit. The Raspberry Pi Zero W would typically be programmed to control the state of the GPIO pins, turning the LEDs on or off as required. The code would be written in a language supported by the Raspberry Pi, such as Python, and would utilize a library like RPi.GPIO or gpiozero to interact with the GPIO pins.