Our article about building a Geiger counter emulator was also published on HackerNoon!
Now you can not only read it in eight languages, but also listen to it:

https://hackernoon.com/geiger-counter-emulator-of-ggreg20_v3-module-by-means-of-esp8266-part-1-of-3

As a reminder, the Geiger counter emulator is our product (also on Tindie), which you can order from us or make yourself. This device is very convenient for developing and testing radiation counters. It is also a very cool thing for studying. 

This three-part article is also available in full on our website in English and Ukrainian.