Our site and the GGreg20_V3 DIY Geiger counter product are referenced by the author of the book Francesco Riggi, published by Springer in April 2024 under the title Educational and Amateur Geiger Counter Experiments. The book is devoted to theoretical foundations and practical experiments with Geiger counters. In particular, the book deals with DIY counters, which are developed by radio amateurs and are quite popular components for various IoT projects. Thank you for mentioning our projects and company in the book. We are glad to be a part of the community of DIY enthusiasts who managed to r ..read more

We have good news! We are an Etsy Star Seller again! For the second month in a row, our Etsy shop has received a Star Seller badge. This was made possible thanks to our valued customers and the efforts of the IoT-devices team that designs, manufactures and ships our IoT and DIY products worldwide from Ukraine. Our flagship product GGreg20_V3 has found its users in more than 27 countries. Through our Etsy store, in 2024 alone, we have already fulfilled a number of orders from Germany, the USA, Australia, the UK, and France. Thank you for your trust and cooperation. We are proud of this wonderf ..read more

We have previously written about how to calculate the coefficients for the SBM20tube and the J305, tube that come with our Geiger counter module GGreg20_V3 for DIY / IoT projects. However, in those articles, we focused heavily on the calculation formulas and almost overlooked a very important detail: when calculating the conversion factor for the Geiger tube pulse count, we need to be aware of what exactly we want to get as the output. If we need to obtain the radiation power of a radioactive source registered by the counter, this is one task. It is a completely different task when we need to ..read more

November 06, 2023, Kyiv, Ukraine. Dear users, customers and partners! We are pleased to announce that with the launch of Etsy Payments service in Ukraine, we immediately opened our own official store on this wonderful platform for DIY. Now you can order the company’s products on Etsy or Tindie, as well as on our website. With the launch of Etsy Payments in Ukraine, our visitors and regular customers can choose any convenient and secure payment method such as bank cards, PayPal, etc. As an added bonus, Etsy protects transactions between consumers and traders within the platform. On this occasio ..read more

An interesting work by experts from the Kyiv Polytechnic Institute describes software methods for analyzing streaming data, in particular, for analyzing radiation pollution: https://journals.kntu.kherson.ua/index.php/visnyk_kntu/article Our modules were used in the project GGreg20_V3 and ESP12.OLED_V1 The article analyzes open data on radiation air pollution in the city Kyiv and visualized the data using analytical tools of the Python programming language ..read more

Great news! Several more customers have connected to the gmcmap.com radiation detectors based on our GGreg20 radioactive particle detector module. (On the Tindie marketplace ) First one: Lyon, France https://www.gmcmap.com/historyData.asp?Param_ID=79913303488 Another sensor with GGreg20 module in Lyon, France https://gmcmap.com/historyData.asp?Param_ID=81743704750 Next sensor with GGreg20 module in Pilsen, Czechia https://gmcmap.com/historyData.asp?Param_ID=46638764351 ..read more

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. The main features of this example configuration compared to our previous ones: two types of tubes are taken into account and supported: J305 and SBM20. The user can switch between the two types of tubes with a convenient selector to calculat ..read more

We have already made a similar publication for the SBM20 Geiger tube. This time we bring to your attention an article dedicated to the equally popular J305 tube made in China. According to our statistics, the J305 tube is second only to the Soviet-made SBM20 tube in terms of prevalence among DIY Geiger counter projects. However, time passes, technologies improve, and supply chains change. New products and components are steadily occupying their niche on the shelves of electronics suppliers, gradually displacing temporary solutions from the market, which, in fact, was the Soviet SBM20 tube in ..read more

Everyone who is involved in DIY IoT projects is familiar with the LM75 temperature sensor. Termometer LM75 – it is a cheap and convenient sensor that has sufficient accuracy and measurement range. But its main advantage is that it works via the I2C bus. Why these thermometers are underrated Someone may say that LM75 is not the best sensor in terms of its technological features and design as a chip. Indeed, there are many other types of temperature sensors, such as 1-Wire Dallas DS18b20. These sensors have a one-wire connection and many other design advantages, such as waterproof metallized cap ..read more

Recently, the ESPHome firmware has been changed to prevent the same controller I/O ports from being reused to create different entities. This mechanism is called Pin Reuse validation: https://esphome.io/changelog/2023.12.0.html#pin-reuse-validation These updates in ESPHome version 2023.12.0 also affected the examples developed by our company for the GGreg20_V3 Geiger counter ionizing radiation detector module. According to the user’s request (https://github.com/iotdevicesdev/GGreg20_V3-ESP32-HomeAssistant-ESPHome/issues/2) regarding the repository for GGreg20_V3-ESP32-HomeAssistant-ESPHome ..read more