TimeWaster’s Geiger Counter v1.1

This software is designed to work with the Arduino Uno and the Radiation Sensor Board for Arduino from Cooking Hacks, but should also work with your own hardware design if you adapt either your hardware or the software.
I suggest to take a look at the documentation of the Radiation Sensor Board, it gives a good summary on radiation detection and the hardware used (Especially the geiger-mueller-tube).

The software is pretty good commented (this is an excerpt from the introductory remarks):

[...]
 * 
 * The display is divided into 5 measured values:
 * ┌---------------------------------------┐
 * │  "Aver. 2s"  "Aver. 20s"  "Aver. 2m"  │
 * │  "Overall Dosage"     "Time elapsed"  │
 * └---------------------------------------┘
 * The average values reflect the average dosage values in uSv/h 
 * over the last x seconds/minutes.
 * The overall dosage reflects the overall dosage taken in uSv 
 * since activation of the counter.
 * 
[...]
 * 
 * Features:
 *  - 3 different average values with configurable timeframe
 *  - Dosimeter functionality
 *  - Adaptable for different tubes (Attention: mind the conversion 
 *    factors for different tubes, ask the manufacturer of the tube)
 *  - Configurable thresholds for the LED bar in uSv/h
 *  - Configurable which value should be used as threshold
 *  - Configurable overflow value in microseconds
 * 
[...]
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * any later version.
 * 
[...]

Download:
TimeWaster’s Geiger Counter v1.1

Older versions:
TimeWaster’s Geiger Counter v1.0

Todo’s for future releases:
- You tell me!

Version history:

 * v1.1:
 *  - You can set your name
 *  - Replaced main loop time calculation 
 *  - Replaced overflow check loop with interrupt
 *  - More exact measurement
 *  - Minor bugfixes
 * 
 * v1.0:
 *  - Initial release

Have fun and stay safe!