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1. Raspberry Pi: The main computing unit. A model with GPIO pins, such as the Raspberry Pi 4 or Raspberry Pi Zero W, would be ideal for interfacing with peripheral sensors.
2. Geiger Counter Module: For detecting radiation levels. Modules like the MightyOhm Geiger Counter can be interfaced with the Raspberry Pi through GPIO pins.
3. GPS Module: For precise location tracking. A module like the NEO-6M GPS module can provide accurate GPS data and can be connected via serial communication to the Raspberry Pi.
4. Optional Display: You might want an OLED or LCD display to show radiation levels and GPS coordinates in real-time on the hat.
5. Power Supply: Considering this is a wearable device, a compact and rechargeable battery solution is essential. A LiPo battery with a charging module can be used, ensuring it has enough capacity to power your Raspberry Pi and peripherals for your desired duration.

• Geiger Counter Module to Raspberry Pi

  • Connect the Geiger counter's output pin to one of the GPIO pins on the Raspberry Pi for detecting the radiation ticks. Ensure that the voltage levels are compatible.
  • Connect the ground of the Geiger counter module to the ground pin on the Raspberry Pi.

• GPS Module to Raspberry Pi

  • Connect the GPS module's TX (transmit) pin to the RX (receive) pin of the Raspberry Pi's UART GPIO.
  • Connect the GPS module's RX pin to the TX pin of the Raspberry Pi’s UART GPIO.
  • Power the GPS module with 3.3V and ground from the Raspberry Pi.

• Develop a Python script to manage data collection from both the Geiger counter and GPS module. Libraries such as RPi.GPIO can be utilized for interfacing with the Geiger counter, and pyserial for reading data from the GPS module.
• For the Geiger counter, the script should count the number of ticks within a specific interval to calculate the radiation level.
• For the GPS module, parse the NMEA sentences to extract the current latitude, longitude, and possibly altitude and time information.
• Optionally, integrate data logging or real-time data transmission capabilities over WiFi if you need to store or remotely monitor the radiation levels and locations.

• Consider the power requirements of your Raspberry Pi, Geiger counter module, GPS module, and any displays or additional peripherals. Ensure your battery capacity is sufficient.
• Implement power-saving features in your software, like sleep modes for the GPS module when not actively tracking, to extend battery life.

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• Search and Add the Raspberry Pi GPIO Header: This acts as the connection point for both the Geiger counter module and the GPS module.

  • Use the search box to find a GPIO header that matches your Raspberry Pi model.$87efed07-6e3f-5153-afb5-e94c7a9cc36d$

• Search and Add the Geiger Counter Module: You might need to select a generic module or create a custom component if your design tool does not have a specific Geiger counter module.

  • For the Geiger counter, the important connections are the power supply (VCC and GND) and the output signal which goes to one of the GPIO pins on the Raspberry Pi.$87efed07-6e3f-5153-afb5-e94c7a9cc36d$

• Search and Add the GPS Module Component: Similarly, if the GPS module (such as the NEO-6M) isn't available directly, you might use a generic module and manually assign connections.

  • Key connections include VCC, GND, TX, and RX. The TX of the GPS goes to a RX GPIO pin on the Raspberry Pi, and the RX of the GPS connects to a TX GPIO pin on the Raspberry Pi.$87efed07-6e3f-5153-afb5-e94c7a9cc36d$

• Geiger Counter Module to Raspberry Pi:

  • Connect VCC to a 3.3V or 5V pin (as appropriate for your module).
  • Connect GND to a ground pin.
  • Connect the signal output to a GPIO pin for counting ticks.

• GPS Module to Raspberry Pi:

  • Connect VCC to a 3.3V pin.
  • Connect GND to a ground pin.
  • Connect TX to a RX GPIO pin on the Raspberry Pi for reading GPS data.
  • Connect RX to a TX GPIO pin on the Raspberry Pi if bi-directional communication is needed.

• Ensure the GPS module is positioned with a clear view to the sky if enclosed in the hat, minimizing signal obstruction.
• Place the Geiger counter module in a manner that allows for optimal radiation detection, depending on the sensor's requirements (e.g., facing outward).
• Consider the power supply routing carefully to avoid noise in sensitive components like the GPS module.