:: arduino pro mini clone playing with ADC
 |
32
samples per read
 |
128
samples
per read, LCD on  128 samples per read, LCD off |
|
||||||
256
samples
per read (LCD write off) |
 |
320
samples
per read (LCD write off) |
512
samples
per read |
 |
640
samples per read
|
 |
1280samples
per read
|
 |
|||||||
2048
samples per read
|
 |
| 2240 samples per read, LCD off |
 |
2560
samples per read
|
(LCD write
turned off)
 |
|
8192
samples per read
|
at this point, the ADC capture routine is changed into a 1 shot burst of 250 frames. these 2 sets are 250x 2samples. captured in 74.6ms
the waveform looks like a capacitively coupled distorted swuare wave?
and i think we found our noise. this 250 frame burst shot in 34.8ms correlates to the above @ 1 sample per capture.
the sine wave appears to be the mains noise @ around 20ms period.
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