Velocity sensing

[avikde]

• test if the circuit works without the inductor
• try the concomitant sensing - hardcode params?
• logging high rate data. use mavlink + UART?

Related to #53

[avikde]

Does not work without a resistor 33R instead of the inductor - don't have a good understanding yet.

[avikde]

Looking at #52 (comment) (that was with L and C=1nF)

• there are about 4 periods in 5us => LC period ~= 1.25us
• from the photo below looks like 1 period in ~2us.
• based on rough ballpark https://www.wolframalpha.com/input/?i=solve+2+pi+sqrt(L+*+1e-9)+%3D%3D+1.5e-6 maybe somewhere in [30, 120] uH

[avikde]

Got nice sinusoids again on the other side. Possibly the caps or something are broken on the first driver side.

[avikde]

Using a 10k resistor is too high with the 0.1uF cap... square wave tracking looks "RC" like...

Could try 50ohm.

[avikde]

Resistor keeps breaking. Need to do an analysis of the circuit.

[avikde]

Current status:

• 22ohm resistor still reads that => should have worked?
• implement mavlink interface for reading back log data
• try collecting voltage/current data