Mol: Created page with "== Introduction == The Vernier ACC-BTA acceleration sensor together with NXT Adapter. The Vernier support assumes that I think it is safe to say that the EV3 was not designe..."

2020-09-26T08:17:06Z

Created page with "== Introduction == The Vernier ACC-BTA acceleration sensor together with NXT Adapter. The Vernier support assumes that I think it is safe to say that the EV3 was not designe..."

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== Introduction ==

The Vernier ACC-BTA acceleration sensor together with NXT Adapter.

The Vernier support assumes that I think it is safe to say that the EV3 was not designed for data collection. It was designed for robotics. You should not expect it to be a good as a LabQuest in data collection, because of the reason mentioned above, and also, if I am remembering correctly, it has a 10-bit analog-to-digital converter, vs LabQuest's 12-bit version.

== Issues ==

The offset voltage is varied by some small amount (a few percent) when running the program. TODO: rerun the program multiple times to check the difference.
So, could that be because of
1) The alignment (or positioning) of the sensor? It doesn't exactly fit the LEGO size standards. . .
2) The electronic cables or junctions?
3) Something else?

Actually, it might be due to that the supply voltage (which should be 5.0 volts) is not quite the same on the Ev3 as with LabQuest. That would cause a small, consistant change in calibration, but you should be able to deal with it in software.

One more complication for the EV3 is that when a motor goes on or off, it is hard not to have that cause voltage swings and even electromagnetic noise. TODO: Check with labquest and Adapter.

== Notes ==

Vernier acc-bta sensor - Revision history

Mol: Created page with "== Introduction == The Vernier ACC-BTA acceleration sensor together with NXT Adapter. The Vernier support assumes that I think it is safe to say that the EV3 was not designe..."