Search found 674 matches

by Steven Sesselmann
26 Sep 2019, 10:00
Forum: Introductions >> Start Here !
Topic: Hello there!
Replies: 1
Views: 100

Re: Hello there!

Hi Steve, Welcome to the forum, due to persistent spammers I have to manually approve your first three posts, so there is a bit of delay between when you post and when the post shows up. Enjoy the journey of learning about gamma spectrometry and remember there is still a lot to discover inside the a...
by Steven Sesselmann
23 Sep 2019, 09:03
Forum: Spectrum
Topic: Trinitite with Graded Shield
Replies: 2
Views: 170

Re: Trinitite with Graded Shield

Massimo, Pardon me for asking, but how does Radmax lead sheet from United Nuclear differ from ordinary lead flashing bought in a hardware store? According to Radmax web site "A proprietary manufacturing process that involves manipulating the grain structure of the material makes it far superior to o...
by Steven Sesselmann
22 Sep 2019, 20:56
Forum: Shielding
Topic: Shield Lining for X-Ray Suppression
Replies: 1
Views: 133

Shield Lining for X-Ray Suppression

I often get asked about copper lining of lead shields and how thick to make the lining, so with a bit of time on my hands today I ran a couple of experiments to determine the effect of copper and tin on the unwanted Pb x-rays that show up in our spectra. So just a quick recap for those new to this: ...
by Steven Sesselmann
21 Sep 2019, 20:00
Forum: Software
Topic: GEIGERBOT for Iphone
Replies: 34
Views: 2455

Re: GEIGERBOT for Iphone

Jason, That sounds like good news indeed. I just updated my iPhone, but sadly it only went to version 12.4.1 so maybe the phone is too old. Geigerbot can be quite tricky to set up, you need to get the gain and the pulse height threshold correct before doing the pulse training. Try selecting the Gamm...
by Steven Sesselmann
20 Sep 2019, 10:31
Forum: Detector drivers
Topic: Simple Arduino Pulse Rate Counter
Replies: 13
Views: 612

Re: Simple Arduino Pulse Rate Counter

I think you meant Svilen, not me, I didn't make a loop suggestion. Yes you are right, I should have addressed that to Svilen :p I would make one different suggestion though, there is a potential issue in using millis() - which would not be a problem most of the time, but if this arduino sketch runs...
by Steven Sesselmann
19 Sep 2019, 20:24
Forum: Detector drivers
Topic: Simple Arduino Pulse Rate Counter
Replies: 13
Views: 612

Re: Simple Arduino Pulse Rate Counter

Svilen, I ran into a few issues with your suggestion for the array, but I think Tom and I have found a relatively elegant and fast solution. I tested it up to 30,000 cpm without any issues. This code runs on Arduino Uno with 8 digit 7 segment display with MAX7219 chip. Steven #include "DigitLedDispl...
by Steven Sesselmann
16 Sep 2019, 21:24
Forum: Spectrum
Topic: Lutetium Spectrum
Replies: 5
Views: 398

Re: Lutetium Spectrum

Matthew,

You did indeed, and I even replied, my apologies for not checking this first, and thanks for adding your signature.

Very nice chunk of Lutetium, and the sum peak is where the two pulses overlap so you get 201.82 + 308.88 = 510.76 keV

Steven
by Steven Sesselmann
16 Sep 2019, 11:06
Forum: Spectrum
Topic: Lutetium Spectrum
Replies: 5
Views: 398

Re: Lutetium Spectrum

Hi Photon (assumed not your real name), Thanks for signing up to our forum and sharing your work in the Spectrum Forum. As a general rule we ask new members to post using their real names and to give a brief intro in the Introductions forum, so please feel free to do that now. You can either change ...
by Steven Sesselmann
13 Sep 2019, 08:03
Forum: Detector drivers
Topic: Simple Arduino Pulse Rate Counter
Replies: 13
Views: 612

Re: Simple Arduino Pulse Rate Counter

Svilen,

Thanks, that's exactly what I wanted but didn't know exactly how to do it.

This will also allow me to add a mode button, for changing the integration time.

So in the end what do we call it, java or C++ ?

Steven
by Steven Sesselmann
12 Sep 2019, 19:23
Forum: Detector drivers
Topic: Simple Arduino Pulse Rate Counter
Replies: 13
Views: 612

Re: Simple Arduino Pulse Rate Counter

There seems to be some confusion as to weather it is java or C++

Here is my simple program, so maybe some hyper-polyglot can identify it :D

Steven

Code: Select all


*/ this code is obsolete, see further down the thread