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Topic: Fastest Data Logging? With SD Card? (Read 68243 times) previous topic - next topic

Jantje

Do not PM me a question unless you are prepared to pay for consultancy.
Nederlandse sectie - http://arduino.cc/forum/index.php/board,77.0.html -

koksy123

Hi Guys,

I have a very similar problem where I have to store sampled data of a low frequency SineWave of 250Hz into a SDcard via the Arduino WiFi Shield. Note that I am relatively new to the Arduino world.

Detailed Requirement Specs:
1) Sampling Frequency = ~8kHz (rate of which ADC samples data)
2) Byte Size of single sample = 10 bits adc = 1.25bytes
3) SDcard = Micro SanDisk card 32GB.

I did do a lot of research on this and I know that SDcard writing latency is about ~250ms for SDHC. I don't think I will be able to comprehend advance technique such as changing the kernel. All i need to do is to sample this 250Hz or less analog wave and to be stored in the SD card. Also, can the Arduino ADC's sampling rate be reduced below 8kHz?

Any help would be awesome. I really need this project done ASAP.

THANK YOU.

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