Go unlucky and received a unit from a lower quality batch. No support for the ICs, missing resistor meaning the power LED does not work, badly connected resistor, and even an inductance mounted SMD style because the leads were cut too short. The solder joints have not been heated enough and the solder did not penetrate in the vias. The board is pretty dirty (flux and solder residues that could short tracks). Otherwise, the device works and is quite cheap. It comes with a lot of accessories which is useful.

Go unlucky and received a unit from a lower quality batch. No support for the ICs, missing resistor meaning the power LED does not work, badly connected resistor, and even an inductance mounted SMD style because the leads were cut too short. The solder joints have not been heated enough and the solder did not penetrate in the vias. The board is pretty dirty (flux and solder residues that could short tracks). Otherwise, the device works and is quite cheap. It comes with a lot of accessories which is useful.

Go unlucky and received a unit from a lower quality batch. No support for the ICs, missing resistor meaning the power LED does not work, badly connected resistor, and even an inductance mounted SMD style because the leads were cut too short. The solder joints have not been heated enough and the solder did not penetrate in the vias. The board is pretty dirty (flux and solder residues that could short tracks). Otherwise, the device works and is quite cheap. It comes with a lot of accessories which is useful.

Cheaper geiger counter This is a good geiger counter at cheaper price, perfect to connect with a ESP or arduino module to make a portable radioactivity meter. The board show the particle detected via a buzzer a red led and via TTL pulse output. The module can be connected to battery pack (primary or NI-Mh cell) or directly powered from an Arduino or ESP module via 5V pin. Useful to continuos meter the enviromental radioactivity. A good Geiger counter +++

Cheaper geiger counter This is a good geiger counter at cheaper price, perfect to connect with a ESP or arduino module to make a portable radioactivity meter. The board show the particle detected via a buzzer a red led and via TTL pulse output. The module can be connected to battery pack (primary or NI-Mh cell) or directly powered from an Arduino or ESP module via 5V pin. Useful to continuos meter the enviromental radioactivity. A good Geiger counter +++

Cheaper geiger counter This is a good geiger counter at cheaper price, perfect to connect with a ESP or arduino module to make a portable radioactivity meter. The board show the particle detected via a buzzer a red led and via TTL pulse output. The module can be connected to battery pack (primary or NI-Mh cell) or directly powered from an Arduino or ESP module via 5V pin. Useful to continuos meter the enviromental radioactivity. A good Geiger counter +++