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I am not sure, but you can write the code to a chip with 1 MHz or 8 MHz settings. It could be you are writing it with 1 MHz clock settiing?

Ho, I did not purchase the kit, I made it by myself. In fact, I am also using slightly modified board - it is one sided, and I am using some bricks. I programmed ATtiny chip with Arduino: http://www.ernstc.dk/arduino/2313.htm It seems, I need to modify a geiger.c code a little bit: After int main(vo...

Are there any instructions how to do this?

I have followed this instructions, and compiled the Geiger counter software with Arduino:
http://www.ernstc.dk/arduino/2313.htm

However, it seems something is not working right.

OK, I have found out that it is working, if I set baudrate to 1200.

However, in that case I am getting 8-times higher CPM than it should be.

Since I am not living in a nuclear reactor it clearly seems to be a ATTiny chip programming problem.

Hi, I have connected Raspberry3 to Geiger counter as you described, but when I connect RPi to a power, it doesn't power up. However, if i disconnect PIN 1 (3.3 V), then it powers up and I can ssh to it. Then of course, I cannot get any reading via minicom.. Please note that I have removed batteries ...

Huh, I have found something very interesting. If I connect FTDI cable to Geiger counter and USB, start cutecom and DO NOT turn on the Geiger counter, I am still starting to receive these garbage data. If I connect FTDI to USB only and not to Geiger counter serial interface, I do not receive any data...

Actually, there are not only \0x00 characters, there are several other charcters (\0x80, etc.), but it pasted only NULLs. This is the hexdump contents of (part of) cutecom.log file: 0000000 0080 0080 8080 0080 8080 8000 0000 0000 0000010 0080 8000 0000 8000 8000 8000 8080 0080 0000020 0080 0080 0000...

Hi, just received my FTDI cable (TTL-232R-3V3 from Farnell), connect it to my Ubuntu Linux latop and rud sudo cutecom (by default only root has access to /dev/ttyUSB0. Settings: Device: /dev/ttyUSB0 Baud rate. 9600 Data bits: 8 Stop bits: 1 Parity: None Handshake (software and hardware UNCHECKED!) O...

Hi,

is it possible to connect Geiger counter to RaspberryPi (or it's clones) via pins without FTDI connector? Are there any instructions how to do this around?