Search found 1028 matches

by mightyohm
Sat Jun 12, 2021 2:34 pm
Forum: Geiger Counter
Topic: Replacing the firmware
Replies: 3
Views: 3922

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: 13836

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: 13836

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: 13836

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: 1727

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: 3922

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...
by mightyohm
Mon Oct 26, 2020 3:04 pm
Forum: Geiger Counter
Topic: How to input the source code to Attiny2313?
Replies: 1
Views: 4732

Re: How to input the source code to Attiny2313?

Can you explain what you are trying to do?
by mightyohm
Mon Oct 26, 2020 2:54 pm
Forum: Geiger Counter
Topic: Mightyohm Geiger Counter & Raspberry Pi
Replies: 11
Views: 31341

Re: Mightyohm Geiger Counter & Raspberry Pi

I don't think I'd recommend powering the kit from a GPIO. While the average current might be a few mA the peak current is higher.
by mightyohm
Mon Oct 26, 2020 2:51 pm
Forum: Geiger Counter
Topic: Serial Pinout for J7
Replies: 1
Views: 2315

Re: Serial Pinout for J7

The pinout is compatible with the FTDI USB-serial cable. You'll notice the in the attached image TX/RX are swapped from the pinout listed below - this is because on the FTDI cable, TX and RX are defined with respect to the host, while on the kit the pins are defined with respect to the microcontroll...
by mightyohm
Sat Sep 05, 2020 9:02 am
Forum: Geiger Counter
Topic: Web app interface for MightyOhm Geiger Counter
Replies: 2
Views: 3168

Re: Web app interface for MightyOhm Geiger Counter

This is really cool, thanks for sharing!