GGreg20_V3 Ionizing Radiation Detector

We’ve been planning to post a GGreg20_V3 configuration example for the Raspberry Pi Pico W since ESPHome started supporting this wonderful controller with wireless support. But after users started making projects for RPi with GGreg20_V3, and after Tom’s Hardware wrote about a project using Pico W, we also made our own full-featured configuration example.

Read the full story here:

iot-devices.com.ua/en/ggreg20_v3-with-raspberry-pi-pico-w-under-home-assistant-with-esphome-firmware-config-example-en/

Easy Links

go.iot-devices.com.ua/geiger-counter

go.iot-devices.com.ua/github

We understand very well the difficulties of choosing for radio amateurs who have to choose between different options, including tubes, when ordering a product.

When we developed GGreg20 in 2020, we did not know anything about these things at all. 

Now we can share our company’s experience with anyone who needs help or is just looking for more information.

Read the full story here:

https://iot-devices.com.ua/en/comparison-of-geiger-muller-tubes-sbm20-j305-and-lnd712/

There are a lot of publications on the Internet on how to convert CPM (Counts per Minute) obtained from a Geiger tube to radiation levels. 

However, despite the wide coverage of this topic on various forums and a wide range of examples with code for various programming languages, we had to understand the topic deeper than we wanted to in order to be able to properly calculate the conversion factor for Geiger tube SBM20 from CPM to absorbed dose of radiation μSv/h and configure the conversion in our own products and make an example calculation for everyone.

Read the full story here:

https://iot-devices.com.ua/en/technical-note-how-to-calculate-the-conversion-factor-for-geiger-tube-sbm20/

There are videos on the Internet showing that J305 tubes are very sensitive to UV rays. They literally go crazy under the influence of this type of radiation.

We conducted our own quick UV test of Geiger tubes J305 , which are supplied as an option with the Geiger counter module GGreg20_V3, and filmed a video.

Read the story and watch the video here::

iot-devices.com.ua/en/uv-test-of-the-j305-geiger-tubes/

Easy Links:

go.iot-devices.com.ua/geiger-counter

go.iot-devices.com.ua/ggreg20_v3_tindie

We wondered at @IoT-devices, LLC  what would happen if we took our DIY Geiger counter module - #GGreg20_V3 Ionizing Radiation Detector and put it in a freezer with a target temperature of -23 Celsius together with the ESP32 controller.

Will our sensor work at such a low temperature? Will we see any failures or deviations in the radiation sensor measurements?

My colleagues and I were betting that sooner or later we would get False-Positive pulses at the ESP32 input during strong cooling.

Read full note at:

https://iot-devices.com.ua/en/technical_note_performance_of_diy_geiger_counter_ggreg20_v3_at_low_-temperatures/

We are pleased to inform you about a new option that has been added to our module – the GGreg20_V3 radioactive particle detector. Now you can choose the J305 Geiger-Muller tube.

The J305 tube is one of the most popular Geiger-Muller tubes on the market and has high sensitivity and accuracy in measurement. It also has a wide range of radiation measurement, which allows it to be used for various applications, from experiments to monitoring radiation in the environment.

News source:

https://iot-devices.com.ua/en/ggreg20v3-geiger-tube-j305/

To the attention of those users of the Geiger counter module GGreg20_V3 connected to the ESP32 microcontroller with ESPHome firmware who created their firmware earlier and have not yet had time to update it to the current version.

Source:

https://iot-devices.com.ua/en/technical-note-on-esp32-gpio-interrupt-esphome-bug-fixes/

The Geiger counter module GGreg20_V3 has built-in protection against reverse polarity. This function is realized by means of a Schottky diode.

The module can operate in two modes:

(1) with protection against reverse polarity;

(2) with an extended range of power supply voltage.

Read full article:

https://iot-devices.com.ua/en/technical_note_supply_voltage_range_geiger_counter_ggreg20_v3/

We have recently made a new GitHub repo didicated for GGreg20_V3 + generic ESP32 with pulse counter GPIO debounce in microseconds up to SBM20 GM tube's deadtime (190us). And tested this yaml-config on an ESP32 Wroom (NodeMCU-like module) and used GPIO23 as a pulse counter input. Previously, we did not notice that the ESPHome Pulse Counter API has the ability to apply a low-pass filter. We hope that this example will help many users to counteract the bounce that can sometimes occur in GM-tubed and high voltage systems.

Full setup example:

https://github.com/iotdevicesdev/GGreg20_V3-ESP32-HomeAssistant-ESPHome

Examples of interesting projects in which our clients have used the GGReg20_V3 module:

1. GGReg20_V3 Geiger counter connected to RPi Pico W controller running ESPHome on Home Assistant;

2.Geiger counter based on ESPHome: radiation measurement and data publication on safecast.org.

Read full story at IoT-devices' website:

https://iot-devices.com.ua/en/ggreg20_v3-module-examples-of-interesting-projects/

See also about other users experience:

They write about our GGreg20_v3 module on Twitter;

The GGreg20_V3 radioactive particle detector is installed in Budapest, Pest, Hungary and connected to the radmon.org service;

The GGreg20_V3 radioactive particle detector is installed in Dornstadt, Baden-Württemberg, Germany and connected to the radmon.org service;

Tindie Blog: Ionizing Radiation Detector For Safer Foraging by Jo Hinchliffe.