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FCC rules for 433 MHz question about 15.231 Paragraph E
ka7ehk wrote: Only the FCC can tell you. HOWEVER, it is my understanding that these rules are for "a device", not a system of devices. If you read the other limitations, they all...
Thursday, 17 May 2018 - 22:19
how to safely transmit MCUSR contents from bootloader to main program?
Torby wrote: Perhaps an unitialized (by the app program) global variable?   Then how do you determine where this global is put by the build of the bootloader program, and...
Friday, 5 May 2017 - 00:39
how to safely transmit MCUSR contents from bootloader to main program?
ka7ehk wrote: A predetermined location  in EEROM?   Jim   That would be a slam dunk, but I'd like to avoid doing it with eeprom if possible.  It seems like if...
Friday, 5 May 2017 - 00:27
making sense of ATMega328P bootloader addresses
Yeah I know it was there, I even read it, just still managed to get confused that size was also in words, happened to be close to the example in the FAQ, plus interactions with...
Thursday, 20 April 2017 - 21:42
making sense of ATMega328P bootloader addresses
Yeah I was, had the old one lying around from duemilanove days still.  It is indeed only 512 sorry to falsely state that your bootloader was fat :)   Not sure what I...
Thursday, 20 April 2017 - 17:41
making sense of ATMega328P bootloader addresses
  Yes.  A file called ATmegaBOOT_168_atmega328.hex that I had lying around at any rate.  I hate the impression Arduino bootloaders came from optiboot these days....
Thursday, 20 April 2017 - 00:07
making sense of ATMega328P bootloader addresses
Ok I get it now thanks.  What confused me was optiboot uses fuse settings 1024 word = 2048 bytes of bootloader hence 0x7800 addresses in optiboot, not 0x7000.   Because...
Wednesday, 19 April 2017 - 22:39
how does this free-wheeling protection circuitry work?
Ah that makes sense.  So the TVS represents a trade-off: some negative voltage, but faster field collapse (and therefore turn-off) of the controlled inductive load. Thanks...
Monday, 30 January 2017 - 04:22
how does this free-wheeling protection circuitry work?
So the purpose of the TVS is, that when the negative voltage event ends, the TVS stop conducting faster than D? In this case is it as good to instead use a D with very low reverse...
Sunday, 29 January 2017 - 22:38
Mega48PB - Removed full swing crystal oscillator
So what if you want full-swing operation but still no power drain for clock during power-down operation? I don't see how an external oscillator is going to do this without wild...
Wednesday, 23 November 2016 - 22:06
ATMega328P datasheet bug: pin change ISRs aren't always called on wake
Quote:   These facts are not an impediment to your goal.  You wish to differentiate between a pin-change interrupt and a WDT wakeup, to quickly decide what action should...
Wednesday, 16 November 2016 - 06:16
ATMega328P datasheet bug: pin change ISRs aren't always called on wake
joeymorin wrote: there's no reason in principle Perhaps, but I think it's a rather specious argument.  Maybe some >>other<< interrupt mechanism could do it that...
Tuesday, 15 November 2016 - 20:53

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