MightyOhm.com

Hello,

As of today (May 3rd, 2023) all forums are read only - no new replies or posts are allowed, even for registered users.

Please see the shutdown post for more information.

Hello all, I will be shutting down these forums at the end of this month (April 2023). The forums have been a great asset for over ten years, but unfortunately spam continues to be a constant battle and at this point there is very little legitimate activity in all but the Geiger Counter product supp...

Hi there,

The Geiger Counter kit design is licensed CC BY-SA.

This license appears on the schematic sheet for the kit.
https://mightyohm.com/files/geiger/geig ... edR5R6.png

Thanks for asking and please share more details about your project here!

That's great to hear. Enjoy your kit!

Cool!
Congratulations on figuring that out and fixing your kit!

OK, thanks for the info. I'm surprised that miswiring the pulse connector damaged the kit but stranger things have happened! I'd like to send a replacement microcontroller U2 to you to see if that fixes it. Can you please send an email to support@mightyohm.com with your mailing address and a short n...

If you short across the tube clips, does the voltage on TP1 drop close to zero volts?

How did you miswire J6?

I suspect that U2 might be damaged, but I want to hear more about how you miswired J6.

Thanks for posting the photos and videos. Few things to check: Some of your solder joints look a little suspect. I circled some of the ones that I am not sure about in the attached photo. Ideally the solder joint should have a hershey kiss shape. I recommend reflowing some of the joints that look ro...

That's an interesting failure mode and one that I have not seen before! I'd check all of your solder joints. Most likely the power or ground connection to the microcontroller U2 are not connected, or there is a short somewhere else on the board. If you send a high resolution photo of both sides of t...

Sorry to hear that. How was it miswired?

How are you measuring TP1 to ground? Are you saying that the voltage is not 3V (or close to the battery voltage)?
If you remove the microcontroller U2, does that change anything about TP1?