In the process of making a small Geiger counter sensor that can fit onto a tiny space rover. It ended up working so well that I thought I would post the part list, build and code. Using COTS (Consumer Off The Shelf) parts to get up and running quick. May evolve it into a module.
Components
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SparkFun Qwiic Alphanumeric Display - Green
Multi segment green display, COM-18566
Got the case printed all nice, Used a friends printed that had a textured bed. Test fit all the components and got them soldered up. I uploaded a small video of it in action with a calibrated Caesium-137 source. Radiation module complete!
I was able to test fit the module a few times in the 3D CAD of the rover and have created the following module, it will contain the class 5 detector, SAMD21 Proc, and a buzzer.
A Geiger counter built from a type 5 Pocket Geiger Radiation Sensor from Radiation Watch. The prototype was calibrated by a known Cesium 137 source and was found to be spot on.
Sensor - https://www.sparkfun.com/products/14209 Note: This product is for educational purposes and should not be directly relied upon for determinations regarding one’s health or safety.
Example output-
Display acknowledged. Counts Per Minute (CPM): 1859.00 Radiation (uSv/h): 35.05 Counts Per Minute (CPM): 1867.00 Radiation (uSv/h): 35.21 Counts Per Minute (CPM): 1862.00 Radiation (uSv/h): 35.11 Counts Per Minute (CPM): 1870.00 Radiation (uSv/h): 35.26
The sensor and code are for educational purposes and should not be directly relied upon for determinations regarding one’s health or safety.