Search found 8 matches

by JChristensen
Wed Jul 16, 2014 8:30 pm
Forum: HV Rescue Shield
Topic: Rescued an ATmega1284P-AU
Replies: 1
Views: 15119

Rescued an ATmega1284P-AU

I've been working with the ATmega1284P in the TQFP package. Not exactly sure what happened, but I hosed the fuse bits. Happy to report that the HV Rescue Shield works nicely on the 1284P! It wasn't pretty , but I can't argue with success. I did have to remove the 10K pullup resistor and 1N4148 diode...
by JChristensen
Fri Apr 18, 2014 12:30 pm
Forum: Geiger Counter
Topic: Mute by default?
Replies: 9
Views: 13202

Re: Mute by default?

Whoops! Thanks for posting the fix! Guess it wasn't your turn to watch me. Someone has to keep me honest! I made a couple more minor tweaks. I changed the name of the flag variable from nobeep to beep because constructs like if (!nobeep) make me crazy (remember I'm the guy that forgot EEMEM). I als...
by JChristensen
Thu Apr 17, 2014 5:19 pm
Forum: Geiger Counter
Topic: Mute by default?
Replies: 9
Views: 13202

Re: Mute by default?

Cool! Thanks for sharing your code - I like how you are using EEPROM to store the beep setting! Except I did it wrong. Just went to make the change to my second GC and realized that I'd left off the EEMEM attribute. The code above is fixed now. How embarrassing... :oops: (It worked without EEMEM bu...
by JChristensen
Sun Jan 26, 2014 4:25 am
Forum: Geiger Counter
Topic: Mute by default?
Replies: 9
Views: 13202

Re: Mute by default?

I really had to laugh, I had completed the change probably not 15 minutes before I saw this thread! I have it running on an ATtiny4313. I wanted to have a backup MCU on hand, and checking prices at Mouser, ATtiny2313V-10PU was $2.73 and ATtiny4313-PU was $1.54. The '4313 is capable of low-voltage op...
by JChristensen
Sun Jan 26, 2014 4:17 am
Forum: Geiger Counter
Topic: Tube life
Replies: 5
Views: 7806

Re: Tube life

GroveStreams is excellent. Very robust feature set, good reliability and performance (which were lacking with a couple other such services I've tried). I've found one or two nit-picky little issues and they were responsive to getting them fixed. I've communicated a bit with Mike Mills, the founder. ...
by JChristensen
Sat Jan 25, 2014 2:58 pm
Forum: Geiger Counter
Topic: Mute by default?
Replies: 9
Views: 13202

Re: Mute by default?

Great minds think alike, I just did this:
https://github.com/JChristensen/geiger
by JChristensen
Sat Jan 25, 2014 2:50 pm
Forum: Geiger Counter
Topic: Tube life
Replies: 5
Views: 7806

Re: Tube life

Ooh, embarrassed, missed that on the datasheet. Thanks! I'm designing a logger for the Geiger counter that will log data to GroveStreams. The logger will also control power to the GC. Right now I'm thinking three modes, (1) Log continuously, i.e. once/minute, (2) Log every 10 minutes, (3) Log every ...
by JChristensen
Fri Jan 17, 2014 4:17 am
Forum: Geiger Counter
Topic: Tube life
Replies: 5
Views: 7806

Tube life

First I want to say what an enjoyable kit this was to assemble! I kept thinking that every aspect of the board, parts and instructions had been very well thought out to make assembly easy. Super job, Jeff! I'm new to Geiger counters. I read that G-M tubes have a finite life of about 1E8 events. Sinc...