Circuit Documentation

Summary

This circuit integrates a variety of components to perform sensing, signaling, and communication functions. The primary elements include an HC-SR04 Ultrasonic Sensor for distance measurement, a GPS NEO 6M module for location tracking, and a Raspberry Pi 3B as the central processing unit. The circuit also features a red LED for visual signaling and various resistors for current limiting and voltage division. The Raspberry Pi 3B facilitates the control and data processing for the sensor and GPS module, as well as driving the LED.

Component List

HC-SR04 Ultrasonic Sensor

• Pins: VCC, TRIG, ECHO, GND
• Description: A sensor that measures distance by emitting ultrasonic waves and timing their return after bouncing off objects.

GPS NEO 6M Module

• Pins: VCC, RX, TX, GND
• Description: A GPS receiver module for obtaining geographical position data.

LED: Two Pin (red)

• Pins: cathode, anode
• Description: A red light-emitting diode used for visual indication.

Resistors

• Values: 220 Ohms, 1000 Ohms, 2200 Ohms
• Description: Passive components used to limit current or divide voltages in the circuit.

Raspberry Pi 3B

• Pins: Multiple GPIOs, 3v3, 5V, GND
• Description: A single-board computer used for processing and controlling the various components in the circuit.

Wiring Details

HC-SR04 Ultrasonic Sensor

• VCC connected to Raspberry Pi 3B 5V
• TRIG connected to Raspberry Pi 3B GPIO27
• ECHO connected to a 1000 Ohm resistor
• GND connected to Raspberry Pi 3B GND, LED cathode, and a 2200 Ohm resistor

GPS NEO 6M Module

• VCC connected to Raspberry Pi 3B 3v3
• RX not connected
• TX connected to Raspberry Pi 3B GPIO15
• GND connected to Raspberry Pi 3B GND

LED: Two Pin (red)

• cathode connected to HC-SR04 Ultrasonic Sensor GND
• anode connected to a 220 Ohm resistor

Resistors

• 220 Ohm connected between LED anode and Raspberry Pi 3B GPIO17
• 1000 Ohm connected between HC-SR04 Ultrasonic Sensor ECHO and Raspberry Pi 3B GPIO22
• 2200 Ohm connected between HC-SR04 Ultrasonic Sensor GND and Raspberry Pi 3B GPIO22

Documented Code

No code has been provided for the microcontrollers in the circuit. When code is available, it should be documented here with explanations for each function and routine, including how it interacts with the connected components.