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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
Atmega1281 and Max31855 bit bang not works
Your instrument is not calibrated then! Don’t forget the basics of metrology - error, precision and accuracy. You need to determine if the error is within specification and...
Sunday, 2 August 2020 - 23:01
High accuracy position device (like GPS)
Virtually all surveying is done with GNSS. So i think that is your answer.
Sunday, 2 August 2020 - 22:15
Illegal storage class __flash in Jumpstart ImageCraft IDE
The code is using non-standard compiler features. Seems the problem is in port.h
Sunday, 2 August 2020 - 12:45
Atmega1281 and Max31855 bit bang not works
Again, your thermocouple looks like its wired backwards, thus a negative result according to the bits. Your code does not manage the sign it seems.
Sunday, 2 August 2020 - 12:41
Some Sensors Using ATMega32-16AU
And your crystal. Read the manufacturer's specs to see you don't exceed acceleration etc.   And the battery holder - you have a mass supported by a couple of thin pins....
Sunday, 2 August 2020 - 10:08
AVRs with accurate internal clocks
Your requirement is +/- 1%. That's close to the spec of the chip (assuming +/-1% for the micro). What temperature range do you expect your device to work in? Eg: many of my...
Sunday, 2 August 2020 - 10:00
Atmega1281 and Max31855 bit bang not works
This looks suspicious:   tempC = (float)(((shifreg >> 18) & 0x7FFC) * .25 + tempIntC);Why mask with 0x7ffc? Its 14 bits, so surely 0x3fff   You also need to...
Sunday, 2 August 2020 - 07:37
Atmega1281 and Max31855 bit bang not works
This bits look ok to me. My translation is the thermocouple is wired backwards and the temperature is around 15C or I might be off by two.   I dare say the error is in the...
Sunday, 2 August 2020 - 02:22