A Calibrated Solid State Radiation Detector

Share on facebook
Share on google
Share on twitter
Share on linkedin
A VPN is an essential component of IT security, whether you’re just starting a business or are already up and running. Most business interactions and transactions happen online and VPN

I’ve been playing with radiation detectors. The common solution is a Geiger – Müller tube, but those solutions tend to be expensive, and contain high voltage connections. PIN Diodes can be used, and are very inexpensive, but are uncalibrated.

A nice in between is a calibrated (3.4 cpm/µSv/h) solid state sensor from Teviso, the RD2007. There are three such sensors in this family, but the RD2007 is a very affordable solution, applicable to civilians and citizen scientists alike.

It has three connections, 5v, Gnd, and data out. The output line ticks high when radioactivity is sensed. Connect this to an interrupt on the arduino, and you can easily display accurate radioactivity readings.

For more information on building Radiation Detectors, see http://opengeiger.de/index_en.html



#define MAXCNT 10
#define CalFactor 3.4
volatile int counter = 0;
unsigned long oldTime = 0;
float rate = 0.0;
int speaker = 5;

void setup()
pinMode(speaker, OUTPUT);
int i = (int)(rate*10.0);
attachInterrupt(0, count, RISING);
void loop() {
unsigned long time;
unsigned long dt;

time = millis();
if (counter >= MAXCNT) {
dt = time-oldTime;
oldTime = time;
counter = 0;
rate = (float)MAXCNT*60.0*1000.0/(float)dt/CalFactor;
int i = (int)(rate*10.0);
void count()
digitalWrite(speaker, HIGH);
digitalWrite(speaker, LOW);

Steve Spence

Steve Spence

Leave a Reply

Leave a Comment

Your email address will not be published. Required fields are marked *