Search found 1032 matches

by mightyohm
Thu Oct 14, 2021 11:55 pm
Forum: Geiger Counter
Topic: Is Lead-210 a good test source?
Replies: 3
Views: 284

Re: Is Lead-210 a good test source?

From my quick research, Pb-210 is primarily a beta emitter. The problem may be that the energy of the beta decay is too low to penetrate the tube. I don't have any experience with Pb-210, so I'm not sure. I recommend finding another test source (preferably a gamma emitter): https://mightyohm.com/blo...
by mightyohm
Tue Oct 12, 2021 7:12 pm
Forum: Geiger Counter
Topic: How to view data from the Geiger counter through the serial port
Replies: 1
Views: 274

Re: How to view data from the Geiger counter through the serial port

Giancarlo, Yes, it is transmitted as text. You can find information about the data logging capability in the usage instructions here: https://mightyohm.com/blog/products/geiger-counter/usage-instructions/ and also in this tutorial: https://mightyohm.com/blog/2012/02/tutorial-geiger-counter-data-logg...
by mightyohm
Sat Jul 31, 2021 10:04 am
Forum: HV Rescue Shield
Topic: [Solved] Nothing on serial monitor
Replies: 1
Views: 3646

Re: [Solved] Nothing on serial monitor

Glad you got your kit working, and thanks for posting!
by mightyohm
Sat Jul 31, 2021 10:00 am
Forum: Wifi Radio Project / Hacking the Asus WL-520gU
Topic: USB sound problem
Replies: 2
Views: 2168

Re: USB sound problem

Great to hear, good luck with your project!
by mightyohm
Sat Jun 12, 2021 2:34 pm
Forum: Geiger Counter
Topic: Replacing the firmware
Replies: 3
Views: 7553

Re: Replacing the firmware

Yes, you have to use an AVR programmer and the ICSP lines. Thanks for the feedback, I agree that a tutorial would be helpful.
by mightyohm
Sat Jun 12, 2021 2:33 pm
Forum: Geiger Counter
Topic: Serial Console giving scrambled output like "IKL\0xe9\0xd4!/%\0xa39!%" - SOLVED
Replies: 10
Views: 17116

Re: Serial Console giving scrambled output like "IKL\0xe9\0xd4!/%\0xa39!%" - SOLVED

The firmware has never changed, so you are already running the latest version. :D
by mightyohm
Fri May 07, 2021 9:26 am
Forum: Geiger Counter
Topic: Serial Console giving scrambled output like "IKL\0xe9\0xd4!/%\0xa39!%" - SOLVED
Replies: 10
Views: 17116

Re: Serial Console giving scrambled output like "IKL\0xe9\0xd4!/%\0xa39!%" - SOLVED

The kit will not work with an ordinary RS-232 serial port! The voltage levels are wrong. You need a USB-serial adapter that works with 3V voltage levels. Some but not all of them do. I use the FTDI USB-serial cable but the Adafruit FTDI friend also works well (set it for 3V!) If you flashed the firm...
by mightyohm
Wed May 05, 2021 6:49 pm
Forum: Geiger Counter
Topic: Serial Console giving scrambled output like "IKL\0xe9\0xd4!/%\0xa39!%" - SOLVED
Replies: 10
Views: 17116

Re: Serial Console giving scrambled output like "IKL\0xe9\0xd4!/%\0xa39!%" - SOLVED

What USB-serial adapter are you using? Is it compatible with 3V serial levels? Many of them are, but that could be a source of problems.
by mightyohm
Sun Mar 28, 2021 9:54 am
Forum: Geiger Counter
Topic: Gieger Board Troubleshooting
Replies: 1
Views: 3225

Re: Gieger Board Troubleshooting

It sounds like the HV supply is not working. I'd start by reflowing any solder joints that look suspect. You can a nice smooth solder joint that fully surrounds each lead. It should look like a hershey kiss when you are done (not too little solder, not too much). Check that all of your transistors a...
by mightyohm
Sat Jan 02, 2021 11:27 am
Forum: Geiger Counter
Topic: Replacing the firmware
Replies: 3
Views: 7553

Re: Replacing the firmware

Hi there, This is a good suggestion - I don't think that I ever wrote a tutorial on how to do this. You'll need an AVR programmer and a toolchain. The tools have changed a bit since I wrote the code for the kit, but at the time I used Atmel's AVR Studio for development. However, there are open toolc...