GQ Electronics Technical Support Forum

GQ Electronics Technical Support Forum
Home | Profile | Register | Active Topics | Members | Search | FAQ
Save Password
Forgot your Password?

 All Forums
 GQ Electronics Forums
 2.GQ Geiger Muller Counter
 GMC-300 Schematic?

Note: You must be registered in order to post a reply.
To register, click here. Registration is FREE!

Format Mode:
Format: BoldItalicizedUnderlineStrikethrough Align LeftCenteredAlign Right Horizontal Rule Insert HyperlinkInsert EmailInsert Image Insert CodeInsert QuoteInsert List Spell Checker

* Forum Code is ON
Smile [:)] Big Smile [:D] Cool [8D] Blush [:I]
Tongue [:P] Evil [):] Wink [;)] Clown [:o)]
Black Eye [B)] Eight Ball [8] Frown [:(] Shy [8)]
Shocked [:0] Angry [:(!] Dead [xx(] Sleepy [|)]
Kisses [:X] Approve [^] Disapprove [V] Question [?]

   Insert an Image File
Check here to include your profile signature.

T O P I C    R E V I E W
njc Posted - 03/11/2013 : 12:01:31
Would it be possible to get a schematic of the GMC-300? I'd like to possibly modify mine for an LED, serial communications, or perhaps a different tube.

13   L A T E S T    R E P L I E S    (Newest First)
njc Posted - 04/10/2013 : 10:32:37
Thanks, ZLM.

I have added more customization by an .ini file as well as commandline switches. Instructions are included in the download.
You can now:
-log to .csv file
-log to SQL database
-customize email alerts

There is also a program log which logs events of the application as it is running. I added a lot of comments to the source code so if anyone is so inclined, feel free to tweak!

If anyone uses this, let me know.

ZLM Posted - 03/27/2013 : 21:29:25
Thank you. I have placed your code in download area.
njc Posted - 03/25/2013 : 14:49:32

Source is included as well as win32 binaries.
Be sure to see the README.txt file for usage info.

Email or post here with any bugs, questions or comments.

ZLM: Perhaps move this to a more appropriate thread (the title of this one is about schematics)
ZLM Posted - 03/24/2013 : 15:20:23
njc, Would you please post your code here? so that other users are able to benifit from it.
chillomatic Posted - 03/24/2013 : 13:38:56
I have a webserver on my NAS so i should be able to run it. I would be very interested in trying it out.
njc Posted - 03/23/2013 : 19:18:06

The charts are highcharts ( and use javascript/jQuery. You'll need a webserver to run them. The app I wrote reads the count-per-second data from the GMC-300, averages the data, and writes to a SQL database.

I will provide the app and the source (python) to anyone who is interested.
chillomatic Posted - 03/22/2013 : 13:54:52
Wow the graph looks nice! Is there a chance to get this for myself?
ZLM Posted - 03/21/2013 : 19:46:03
No. That is the only way.

If you want to keep the speaker, then you need to add more components.
eg. add a LM393 isolator.
njc Posted - 03/19/2013 : 07:16:57
What about a way to have the LED still work when I disable the speaker from the UI?
ZLM Posted - 03/18/2013 : 20:44:02
you have to upload the image to this server.

The easiest way is to replace the speaker with a LED(serial a 1K ohm resistor).
njc Posted - 03/18/2013 : 08:43:16
Why can't I link images?!
njc Posted - 03/18/2013 : 08:42:28
Alright then maybe you could tell me the following:

What do each of the pots do? I'm pretty sure one is for tube voltage.
How might I go about putting an LED to flash with each count? (not in parallel with the speaker -- I want to be able to disable the speaker and just have LED). Is there an output from the micro I could use?

That's really it for now. I wrote an app to read the data from the unit and store it to a SQL satabase from which I can display data. The app can also email/text if a threshold is breached and has some other txt file logging options. It's a work in progress :)

See here:

Image Insert:

10.95 KB

Image Insert:

114.81 KB
ZLM Posted - 03/12/2013 : 21:09:34
If you want to a speicific mod, then I may give you some ideas. But I do not have the schematic since this is not an open source project.

GQ Electronics Technical Support Forum © Copyright since 2011 Go To Top Of Page
Generated in 0.12 sec. Snitz's Forums 2000