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AVRs with accurate internal clocks
Even with an external watchdog a microcontroller can get stuck. You’ve not stated what degree of reliability you require - what MTBF do you want? If the micro does get stuck -...
Tuesday, 4 August 2020 - 13:21
What was your first micro programming experience?
I still know way too much about these computers. I built a floppy disk controller and ram upgrade for these at a spotty young age.
Tuesday, 4 August 2020 - 13:03
AVRs with accurate internal clocks
You'd really only have an external watchdog in a safety critical application. The external watchdog would be protecting something other than the microcontroller - the...
Tuesday, 4 August 2020 - 12:43
AVRs with accurate internal clocks
Reliable? Depends how you determine what is reliable. For safety critical designs I've used a simple charge pump circuit as a hardware watchdog for critical power circuits. If the...
Tuesday, 4 August 2020 - 10:52
AVR128DA64-E based project board? Anyone know of one? Anyone interested in designing one for me?
The MIC5283 is not a good choice methinks. As for chips with specific hardware - i don’t see how that would limit what you want to do. Having specific hardware makes it easier and...
Tuesday, 4 August 2020 - 05:34
AVR128DA64-E based project board? Anyone know of one? Anyone interested in designing one for me?
 120v -> 5v regulator might do the trick: MIC5283-5.0YME-T  it's only 150ma though.  Do the math - (120V-5V) * 0.15A = 17W. Best be calling the fire...
Tuesday, 4 August 2020 - 02:25
Need help with passive piezo buzzer
Firstly: TCCR0B |= (1 << WGM02); //8-bit CTC mode TCCR0A |= (1 << COM0A0); //toggle OC0A on compare match TCCR0B &= !((1 << CS02)|(1 << CS01)|(1...
Monday, 3 August 2020 - 22:54
High accuracy position device (like GPS)
https://www.instructables.com/id...   Worth noting that GPS is not the only one in town. There's Galileo, Beidou, Glonass and a couple more satellite constellations. Like...
Monday, 3 August 2020 - 22:46
High accuracy position device (like GPS)
Rubbish! Survey grade GPS/GNSS has done 2cm accuracy for many years. It might be difficult to obtain in your part of the world though. There’s a ship off the coast of Dubai that...
Monday, 3 August 2020 - 11:18
AVR128DA64-E based project board? Anyone know of one? Anyone interested in designing one for me?
The spec starts out pretty simple - even for something like a pro-mini, the time required to chose the required components is a few hours work. It's no use designing a board for...
Monday, 3 August 2020 - 10:20
AVRs with accurate internal clocks
I am working on a 10 unit prototype, if all goes well, I will start with 500units.   Unless you have a bit of experience, don't even waste your time doing a pcb until you've...
Monday, 3 August 2020 - 09:54
ATmega 328P, why won't you talk to me?
Kartman: Despite the username, your words really helped. So disheartening after weeks of research, designing, etc. things just fall apart on just putting the bloody thing...
Monday, 3 August 2020 - 09:49

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