Old 07-18-2014, 04:56 AM #1
Sigurthr's Avatar
Class 3B Laser
 
Join Date: Dec 2011
Location: Michigan's U.P.
Posts: 4,382
Rep Power: 3121
Sigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond repute
Sigurthr Sigurthr is offline
Class 3B Laser
Sigurthr's Avatar
 
Join Date: Dec 2011
Location: Michigan's U.P.
Posts: 4,382
Rep Power: 3121
Sigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond repute
Cool Arduino based Pulse Counter

I decided to work on an old pancake geiger counter I picked up a few years back. I did the circuitry repairs years ago but I never got around to making a computer interface for pulse counting/scaling. Today I rectified that.

I'm posting it here because it may be of use for our members for other applications. The program simply looks for >2.3V to 5V pulses on Arduino's Pin3 and flashes the built in led (and drives Pin13 HIGH for 33mS) every time there is a pulse. The program then tallies up all the pulses observed over the time period indicated in the SamplePeriod variable (which is in mS, so it is set by default to 60,000, or 1 minute) and displays this count via the built in Serial Monitor on the Arduino IDE program. If you adjust the SamplePeriod variable it will automatically correct for the time period and update the serial monitor display to display the correct time period. You'll have to push the code to the arduino any time yoiu make changes though, I didn't do live serial two way communication.

Sample applications would be RPM counter, Frequency Counter (set SamplePeriod to 1000), item counter, etc.

UPDATE: New version of counter program optimized for general pulse counting use with dead time compensation to prevent retriggering on a single pulse. Requires the user to input the expected pulse length in uS.

Code:
// Arduino Pulse Counter
// Written by Matt "Sigurthr" Giordano 7/17/14
// email me at Sigurthr@SigurthrEnterprises.com
// TTL input on Pin 3
// Indicator LED on Pin 13 (continuous above 30cps)
// Writes counts per SamplePeriod to Serial Monitor
// once every sample period.
// Set PulseDuration variable to incoming pulse length in uS.
// This code is released for free use and sharing.
// Please just cite the author (me!) upon reuse/republishing!

void setup(){
 Serial.begin(9600);
 Serial.println("Arduino Pulse Counter");
 pinMode(3, INPUT);
 pinMode(13, OUTPUT);
}

 unsigned long X = 0;
 unsigned long SamplePeriod = 60000; // in mS
 unsigned long currentMillis = 0;
 unsigned long previousMillis = 0;
 unsigned long LEDmillis = 0;
 int timeperiod = (SamplePeriod / 1000); // converts mS to S
 int PulseDuration = 100; // Pulse Duration in uS
 boolean LEDstate = false;

void loop(){
  currentMillis = millis();
  if (digitalRead(3) == HIGH){
    X = X + 1;
    LEDstate = true;
    LEDmillis = currentMillis;
    delayMicroseconds(PulseDuration);  // prevents multiple triggering on a single pulse
  }
  if (currentMillis - LEDmillis >= 33){  //keeps indicator LED on for 33mS
    LEDstate = false;
    digitalWrite(13,LOW);
  }
  switch (LEDstate){
    case true:
      digitalWrite(13,HIGH);
      break;
    case false:
      digitalWrite(13,LOW);
      break;
  }
  if (currentMillis - previousMillis >= SamplePeriod) {
    previousMillis = currentMillis;
    Serial.print("Counts per ");
    Serial.print(timeperiod);
    Serial.print(" seconds: ");
    Serial.println(X);
    X = 0;
  }    
}
Also, here is a Geiger Counter Friendly version, which includes dosimetry data output and a cleaned up serial interface. Again, requires expected pulse length in uS and also requires CPM per uR/hr sensitivity for the GM tube used if accurate dosimetry data is to be expected.

Code:
// Arduino Geiger Counter Scaler
// Written by Matt "Sigurthr" Giordano 7/17/14
// email me at Sigurthr@SigurthrEnterprises.com
// TTL input on Pin 3
// Indicator LED on Pin 13 (continuous above 30cps)
// Writes counts per SamplePeriod to Serial Monitor
// once every sample period.
// Set PulseDuration variable to incoming pulse length in uS.
// This code is released for free use and sharing.
// Please just cite the author (me!) upon reuse/republishing!

void setup(){
 Serial.begin(9600);
 Serial.println("Arduino Geiger Counter Scaler"); // Header for Serial Text
 pinMode(3, INPUT); // Pin 3 TTL input
 pinMode(13, OUTPUT); // Pin13 LED indicator output
}

//User Serviceable Variables
unsigned long SamplePeriod = 60000; // Sample Period in mS
int PulseDuration = 100; // Pulse Duration in uS
float GMsensitivity = 3; // GM Tube cpm per uR/hr

//Non-Serviceable Variables
unsigned long X = 0;
unsigned long currentMillis = 0;
unsigned long previousMillis = 0;
unsigned long LEDmillis = 0;
int timeperiod = (SamplePeriod / 1000); // converts mS to S
boolean LEDstate = false;
float uRem;


void loop(){
  currentMillis = millis();
  if (digitalRead(3) == HIGH){
    X = X + 1;
    LEDstate = true;
    LEDmillis = currentMillis;
    delayMicroseconds(PulseDuration);  // prevents multiple triggering on a single pulse
  }
  if (currentMillis - LEDmillis >= 33){  //keeps indicator LED on for 33mS
    LEDstate = false;
    digitalWrite(13,LOW);
  }
  switch (LEDstate){
    case true:
      digitalWrite(13,HIGH);
      break;
    case false:
      digitalWrite(13,LOW);
      break;
  }
  if (currentMillis - previousMillis >= SamplePeriod) {
    previousMillis = currentMillis;
    uRem = (float)X / (float)GMsensitivity;
    Serial.print(X);
    Serial.print("CPM, ");
    Serial.print(uRem);
    Serial.println("uR/hr");
    X = 0;
  }    
}


__________________
Amateur Multispectral Photographer - [X-Ray, UV, Vis, IR]
Amateur Electrical Engineer
Autodidact
Tesla Coil Expert

Last edited by Sigurthr; 07-20-2014 at 06:32 AM. Reason: updated programs
Sigurthr is offline   Reply With Quote


















Old 07-18-2014, 05:04 AM #2
Class 4 Laser
 
Join Date: May 2007
Location: Queensland, AU
Posts: 7,549
Rep Power: 2560
Things has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond repute
Things Things is offline
Class 4 Laser
 
Join Date: May 2007
Location: Queensland, AU
Posts: 7,549
Rep Power: 2560
Things has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond repute
Default Re: Arduino based Pulse Counter

You could probably get even better timing if you used interrupts. You used pin 3 for input, which on the Duemilanove/nano/168/328 based boards are connected to interrupt 1, so you wouldn't even have to modify your hardware

Last edited by Things; 07-18-2014 at 05:05 AM.
Things is offline   Reply With Quote
Old 07-18-2014, 05:07 AM #3
Sigurthr's Avatar
Class 3B Laser
 
Join Date: Dec 2011
Location: Michigan's U.P.
Posts: 4,382
Rep Power: 3121
Sigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond repute
Sigurthr Sigurthr is offline
Class 3B Laser
Sigurthr's Avatar
 
Join Date: Dec 2011
Location: Michigan's U.P.
Posts: 4,382
Rep Power: 3121
Sigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond repute
Default Re: Arduino based Pulse Counter

Yeah, I'm still quite a novice when it comes to programming. I'm a hardware guy (EE, not SE). It took me about five hours to research, write, and debug this code. I haven't learned interrupts yet, and as it is this is my first program using switch...case.
__________________
Amateur Multispectral Photographer - [X-Ray, UV, Vis, IR]
Amateur Electrical Engineer
Autodidact
Tesla Coil Expert
Sigurthr is offline   Reply With Quote
Old 07-18-2014, 05:10 AM #4
Class 4 Laser
 
Join Date: May 2007
Location: Queensland, AU
Posts: 7,549
Rep Power: 2560
Things has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond repute
Things Things is offline
Class 4 Laser
 
Join Date: May 2007
Location: Queensland, AU
Posts: 7,549
Rep Power: 2560
Things has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond repute
Default Re: Arduino based Pulse Counter

Fair enough Programming sucks, avoid at all costs

Doesn't make a huge difference, but C* has a way of handling x = x +/- 1 in a neater way, you can just use x++; or x--;

You can also make if statements a bit neater if you're only dealing with logical values.

Code:
if (x == 1){
Can also just be
Code:
if (x){
or

Code:
if (~x){
x could either be a boolean or an integer that's either 0 or 1.

You can even omit brackets entirely if you only have 1 thing you need to execute:

Code:
if (x)
  Serial.println('Yes it is!');
rest_of_code();

Last edited by Things; 07-18-2014 at 05:24 AM.
Things is offline   Reply With Quote
Old 07-18-2014, 05:19 AM #5
Sigurthr's Avatar
Class 3B Laser
 
Join Date: Dec 2011
Location: Michigan's U.P.
Posts: 4,382
Rep Power: 3121
Sigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond repute
Sigurthr Sigurthr is offline
Class 3B Laser
Sigurthr's Avatar
 
Join Date: Dec 2011
Location: Michigan's U.P.
Posts: 4,382
Rep Power: 3121
Sigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond repute
Default Re: Arduino based Pulse Counter

Quote:
Originally Posted by Things View Post
Fair enough Programming sucks, avoid at all costs

Doesn't make a huge difference, but C* has a way of handling x = x +/- 1 in a neater way, you can just use x++; or x--;
Haha, I agree. Yeah I know about the ++ and -- operators but I wasn't sure if I could just do X++; as a sole line of code so I went the old school route to prevent further debugging.

Interestingly; I got the actual counter code to work first try without any issue. Getting the damn LED's ONTIME pulse width to not be tied to the incoming pulse's pulse width took me hours. I was trying to hook it into the primary timer used in the counter, I didn't realize I had to write an entirely separate timer routine for it. I was originally using two If conditionals instead of the switch...case but for some reason I couldn't get reliable state toggling. That and nested debugging drives me insane.
__________________
Amateur Multispectral Photographer - [X-Ray, UV, Vis, IR]
Amateur Electrical Engineer
Autodidact
Tesla Coil Expert
Sigurthr is offline   Reply With Quote
Old 07-18-2014, 05:32 AM #6
Class 4 Laser
 
Join Date: May 2007
Location: Queensland, AU
Posts: 7,549
Rep Power: 2560
Things has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond repute
Things Things is offline
Class 4 Laser
 
Join Date: May 2007
Location: Queensland, AU
Posts: 7,549
Rep Power: 2560
Things has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond repute
Default Re: Arduino based Pulse Counter

Yeah, those are the fun program problems you run into. The issue with things like Arduino is that unless you need to use them, you don't really understand what the underlying code is actually doing since you don't have to touch it usually.

For example one project I was working on involved driving some self-clocked addressable LED strip from a serial input. When I was sending it serial data, occasionally a few bytes would go missing, just like that, they wouldn't even make it to the serial buffer. Upon reading into it, the Arduino serial buffer is interrupt driven. However, to get the timing perfect for the LED strips, it's library was disabling interrupts while it was pushing data to it. So for the time it was outputting data to the strips, any serial data you send to it was just completely lost. Had me scratching my head for half the day, trying a few different microcontrollers and USB-serial converters etc till I finally figured it out. Of course if I had've written that library from scratch I would have been well aware of that issue from the start, but it was worth the convenience I guess

Last edited by Things; 07-18-2014 at 05:33 AM.
Things is offline   Reply With Quote
Old 07-20-2014, 06:34 AM #7
Sigurthr's Avatar
Class 3B Laser
 
Join Date: Dec 2011
Location: Michigan's U.P.
Posts: 4,382
Rep Power: 3121
Sigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond repute
Sigurthr Sigurthr is offline
Class 3B Laser
Sigurthr's Avatar
 
Join Date: Dec 2011
Location: Michigan's U.P.
Posts: 4,382
Rep Power: 3121
Sigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond repute
Default Re: Arduino based Pulse Counter

Updated the OP to reflect new program version and new program fork. I refined the pulse counter a bit and worked out some inaccuracy bugs (pulse retriggering), as well as added a Geiger Counter friendly version with included dosimetry.
__________________
Amateur Multispectral Photographer - [X-Ray, UV, Vis, IR]
Amateur Electrical Engineer
Autodidact
Tesla Coil Expert
Sigurthr is offline   Reply With Quote
Old 08-22-2014, 03:52 AM #8
Seoul_lasers's Avatar
Class 3R Laser
 
Join Date: Jul 2008
Location: Victoria, British Columbia
Posts: 2,450
Rep Power: 203594
Seoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond repute
Send a message via Skype™ to Seoul_lasers
Seoul_lasers Seoul_lasers is online now
Class 3R Laser
Seoul_lasers's Avatar
 
Join Date: Jul 2008
Location: Victoria, British Columbia
Posts: 2,450
Rep Power: 203594
Seoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond repute
Send a message via Skype™ to Seoul_lasers
Default Re: Arduino based Pulse Counter

Cool!! I just got a hold of some GM tubes ( in Canada (I'm still in S.Korea), My bro found them at a speciality shop near Kelowna (desert country). Apparently he's got LND 7312, LND 712, and LND 7311's for sale.
Going to put together a Hand held probe and a portable digital Geiger counter. Good post.

If you can please post a pic of the old Geiger counter... is it a CDV700 ?
Got me thinking about Geiger mods

btw, somewhat related to your post....
Last night for fun I decided to take Theremino for a test drive with Cs137.WAV file from
a Gamma Spectacular1100A. I set up the program to record line in at 129Khz @ 16bit.
The spectrum was visible in under 30 seconds.
Attached Thumbnails
Arduino based Pulse Counter-cs137-spectra.png  
__________________
650nm ~350mW DVD 20x diode RyanSoh3 Class IIIb
650nm ~350mW DVD 22x 3.5mm labby build 2010 Class IIIb
532nm 10mW-15mW DPSS Module IR filtered(S.Korea)RyanSoh3 Class IIIb
450nm CarbonFiber ElectricPlasma build 9mm +6W Class IV
445nm 3.49W pk ~3.15W av. Sinner Cypreus II +DTR 9mm 445nm Class IV
445nm RHD Saber Twins 2.7W ~2.35W pk Class IV
445nm A140 module x2 Maxsink Class IV
405nm Daguin Kryton Groove SO6J 700mW build. Class IV
405nm Olike 560mW-600mW pen sold Scopeguy20
Class IV
337.1nm TEA Nitrogen laser project 2011 Class IIIb
---------------------------------------------------
Die4Drivers 1.3v lab laser/projector driver

Laserbee 3.2W Deluxe LPM
ARGMeter 1.1v
Ophir 20C-A sensor

Peregrine 1.5.0 is working now on MacOSX Yay!!

Last edited by Seoul_lasers; 08-22-2014 at 04:22 AM.
Seoul_lasers is online now   Reply With Quote
Old 08-22-2014, 06:23 AM #9
Sigurthr's Avatar
Class 3B Laser
 
Join Date: Dec 2011
Location: Michigan's U.P.
Posts: 4,382
Rep Power: 3121
Sigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond repute
Sigurthr Sigurthr is offline
Class 3B Laser
Sigurthr's Avatar
 
Join Date: Dec 2011
Location: Michigan's U.P.
Posts: 4,382
Rep Power: 3121
Sigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond repute
Default Re: Arduino based Pulse Counter

Very cool S_L.

The GC I used for testing was a Black Cat Systems GM-45. They use a russian pancake similar to the LND712 I think.

I also have a SBM-20 from a DSRB-70 (I think it was 70), the entire circuit is intact and working fine but the housing is totally broken. One day I'll rebuild it into a nice housing.

I also have a Universal Atomics CDV-700 that I refurbished years ago. Works a treat.

If you go onto the Black Cat systems website and find their Rad Map you can see live data from the GM-45 unit. I'm the only station in Michigan.
__________________
Amateur Multispectral Photographer - [X-Ray, UV, Vis, IR]
Amateur Electrical Engineer
Autodidact
Tesla Coil Expert
Sigurthr is offline   Reply With Quote
Old 08-22-2014, 06:49 AM #10
Seoul_lasers's Avatar
Class 3R Laser
 
Join Date: Jul 2008
Location: Victoria, British Columbia
Posts: 2,450
Rep Power: 203594
Seoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond repute
Send a message via Skype™ to Seoul_lasers
Seoul_lasers Seoul_lasers is online now
Class 3R Laser
Seoul_lasers's Avatar
 
Join Date: Jul 2008
Location: Victoria, British Columbia
Posts: 2,450
Rep Power: 203594
Seoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond repute
Send a message via Skype™ to Seoul_lasers
Exclamation Re: Arduino based Pulse Counter

Quote:
Originally Posted by Sigurthr View Post
Very cool S_L.

The GC I used for testing was a Black Cat Systems GM-45. They use a russian pancake similar to the LND712 I think.

I also have a SBM-20 from a DSRB-70 (I think it was 70), the entire circuit is intact and working fine but the housing is totally broken. One day I'll rebuild it into a nice housing.

I also have a Universal Atomics CDV-700 that I refurbished years ago. Works a treat.

If you go onto the Black Cat systems website and find their Rad Map you can see live data from the GM-45 unit. I'm the only station in Michigan.
That Blackcat systems model 45 is an LND7312 based unit. ~3500CPM:1mR/hr
Those tubes have gone up in price since the 2011 Great Eastern Japan quake

You're using it as a monitoring station...Cool.
Really itching to get into Gamma Spectroscopy. Would like to get my hands on a Gamma Spectacular (new model with upgraded PSU and noise filtering) and a DSO nano loaded with the new GG2014 firmware. . I have even heard a rumour floating around that it might be ported to run the faster ARM8 or ARM9 processor boards. A fast ADC (16bit or better) would be needed to run the GG to get higher res. Currently the GG only runs on a ARM Cortex M3 with a 10bit ADC... :\ while this works, it would be nicer to use modern ARM architecture.
__________________
650nm ~350mW DVD 20x diode RyanSoh3 Class IIIb
650nm ~350mW DVD 22x 3.5mm labby build 2010 Class IIIb
532nm 10mW-15mW DPSS Module IR filtered(S.Korea)RyanSoh3 Class IIIb
450nm CarbonFiber ElectricPlasma build 9mm +6W Class IV
445nm 3.49W pk ~3.15W av. Sinner Cypreus II +DTR 9mm 445nm Class IV
445nm RHD Saber Twins 2.7W ~2.35W pk Class IV
445nm A140 module x2 Maxsink Class IV
405nm Daguin Kryton Groove SO6J 700mW build. Class IV
405nm Olike 560mW-600mW pen sold Scopeguy20
Class IV
337.1nm TEA Nitrogen laser project 2011 Class IIIb
---------------------------------------------------
Die4Drivers 1.3v lab laser/projector driver

Laserbee 3.2W Deluxe LPM
ARGMeter 1.1v
Ophir 20C-A sensor

Peregrine 1.5.0 is working now on MacOSX Yay!!
Seoul_lasers is online now   Reply With Quote
Reply

Tags
arduino, counter, pulse, timer





Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

























Privacy Policy | Advertising Disclaimer | Terms of Use


 


All times are GMT. The time now is 02:24 AM.


Powered by: vBulletin
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO
Privacy Policy | Advertising Disclaimer | Terms of Use
Copyright (C) 2017 Laser Pointer Forums, LLC