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.