MightyOhm geiger counter OLED + MQTT version
Introduction
Years ago i bought a geiger counter kit at chaos communication congress. Time flew by and i forgot about it. A few month ago I found it in one of my “one day i'll do the project”-crates. Now, after some weeks of tinkering while streaming this live at https://www.twitch.tv/chrisfigge, i've done it and added some improvements. I've removed the batteryholder, because I want to use the kit stationary and replaced it with a Wemos D1 mini. Therefore I'm able to connect the geiger counter to my Home Assistant + I added a small OLED Display, to see all data directly when standing in front of it (+ 10 coolness). After the electronics where finished, I've designed an enclosure, based on the one from DerKurt. Thanks for your awesome work! I've added the possibility to add an OLED display and two buttons, so you're able to switch the menus and disabling the ticking sound.
BOM
- 1x Mighty Ohm Geiger Counter: https://mightyohm.com/blog/products/geiger-counter
- 1x SBM-20 Geiger Tube
- 1x Wemos D1 mini: https://amzn.to/37rq4Rq *
- 1x Mini OLED Display (SSD130): https://amzn.to/3KVpB8J *
- 1x Mini push button: https://amzn.to/3JWwEwt *
- 1x Stepdown module: https://amzn.to/3Evx5wA *
- 1x Breadboard https://loet.bar/products/lochrasterplatine
- 1x DC-Plug https://amzn.to/3rSaIKy *
Links marked with an asterisk (*) are affiliates. This means if you order these items via amazon, I'll get a very small piece of this (financial) cake. You'll not pay more (not even 1 cent. literally nothing). And I can reinvest the money for new ideas and projects. From the community for the community. :)
Images
Just to let you know, what's inside. Here are "some" views:
Schematics
I don't have made the schematics for the kit itself. For this, you just should take a look here: https://mightyohm.com/blog/products/geiger-counter. But I've done a rough sketch about how I connected the ESP to the OLED, button and serial of the geiger counter:
Enclosure
If you want to print a nice enclosure for this project I've got you covered: Just follow this link to printables.com and download everything you need. Please vote this design up, upload your make and feel free to leave a comment.
Twitch
If you are interested in what I'm doing, just have a look at twitch: https://www.twitch.tv/chrisfigge
Tip
I am doing all this stuff in my freetime. And, oh boy, these projects take a lot of time. I swear. If you want to support my work feel free to cheer some bits or giftsubs on my Twitch channel or you can always leave some tip via paypal. Thanks a lot!