Github link: https://github.com/bigcrimping/bhangmeterV2

The BhangmeterV2 is a RaspberryPiPico2W powered device which detects the gamma ray burst from a nuclear explosion and uploads the details into a JSON.

On start-up all three lights flash until WiFi is connected. Every minute the JSON is updated with the latest status of the device. On detection of a nuclear event the JSON is updated and timestamp added, the red indicator is then lit.

The latest status can be found at www.hasanukegoneoff.com

Software Setup

To setup the Raspberry Pi, load MicroPython from https://micropython.org/download/

Once loaded, put the main.py and secrets.py into the MicroPython environment.

You will need to update the secrets.py file with your WiFi details, your GitHub token, and the path to the repo where the .json is stored.

Mechanical Build

PCB Build

The PCB is a simple double-sided board. The Gerbers are in the relevant folder and should be easy to produce by any PCB vendor.

BIST (Built in self test)

As it is largely impractical to set off a weapon to test the device is functionality the BIST pin of the HSN-1000L can be asserted to trigger the NED pin and confirm the device is working OK.

The SW1 switch triggers this functionality, on successful test the BIST button illuminates green