After one week preparing, we made a Geiger Counter prototype using J408γ. The red Led flashes when the power(9v battery) is on, which illustrates that it is receiving the radiation particles of the background environment. The detailed information will be submitted after the counter is fully tested.

Geiger Counter connected to Seeeduino

The count(CPM) we got from the prototype:

The first version of schematic and PCB files have been submitted  on the github here:

Later we will add and edit more information on the garden here:

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