Comment summary #44
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Comment 431 ... 440
| date | article | author | comment |
| 23 okt 2014 12:00:40 | Arduino: Analog measurements | Ayomi | Thank you for this great article. I have a question. You mentioned that a single analog conversion lasts 13 clock cycles, based on what? And do i have the flexibility to change it? |
| 19 okt 2014 22:30:34 | Arduino: Analog measurements | Freddy | I would not know any other way than copying the contents from the serial monitor and paste it in notepad, and then save it. |
| 18 okt 2014 23:14:21 | Arduino: Analog measurements | Oscar Garcia | Hi from Puerto Rico. Thank U for the contribution, great work!. I only have a question. How can I save the digitize data in my computer to later upload it in another program such as MATLAB? |
| 06 okt 2014 20:48:37 | Arduino: Analog measurements | Roberto | Thank you for this great piece of article! I have learnt a lot from it. Thanks. |
| 02 okt 2014 13:32:39 | Arduino wattmeter | Freddy | Sorry, I made a mistake. The "const unsigned int secAvLength" can be lowered to any value, for example to 25, to free some RAM space. But how lower this value, how noisier the measured parameters become. It would be recommended to increase the value of "const unsigned int primAvLength", but this wil cause overflows. So leave it at 64. |
| 02 okt 2014 10:55:49 | Arduino wattmeter | Croc | Hmmm the PrimAvLength doesn't make space if I make it 32. The only one that will give space, if I decrease the secAvLength. Do you have maybe a other idea for the serial.print. |
| 02 okt 2014 00:53:55 | Arduino wattmeter | Freddy | Almost all the RAM space is used for averaging the measured signals. You can make some free space by halving the value in the line: const unsigned int primAvLength = 64; // Number of samples for primary averaging and doubling the value in the line: const unsigned int secAvLength = 50; But this will make the measured parameters more varying. Second, I have bad experience with serial.print communications. My software often conflicts with standard Arduino functions due to dual usage of the controller periphery. But you can try it. |
| 01 okt 2014 22:09:29 | Arduino wattmeter | Croc | I try to log with a serial communication USB with serial.print but I get memory problem and restart the arduino again. Do you have maybe solution how to solve this ? |
| 16 sep 2014 14:57:02 | Arduino wattmeter | JesseC | I recommend using a 18650 lithium battery and a single 18650 USB battery bank. The total cost on ebay is less than $5 USD with shipping to the USA. |
| 16 sep 2014 01:30:56 | Arduino wattmeter | Freddy | Good choice, this reduces also the costs of an internal memory and has a large user defined storage capability. I might as well make a list of options here, maybe other visitors also have good ideas. - powered by a rechargeable Li-ion battery, charged by USB. |