Continuing the discussion from 615 coreless motor mosfet:
I tried to do the same as the schematic above and I found the voltage drop (drain to source voltage) from 3.7v to 0.64 volt in max throttle but turned to 3.7 volt in min throttle. Is this normal?
For this experiment, I use 720 dc motor. I will use 8520 coreless dc motor later.
Do you think 10K resistor is too big. How about 1K?
Between the "output pin" and the Gate?
(If so, in either case: much too much.)
No, but drain to source.
For the sake of clarity --
There are 1k resistors between the output pins and the IRL Gates. Shouldn't be > 100Ω.
No Drain-to-Source resistors are shown. There should not be. Or what are you trying to do?
it was written above the motor.
Is it the cause of the drop voltage? okay, I will remove 1KΩ and add 100Ω
He noted "between first and last leg".
That would be Gate to Source, which is Gate to GND.
Yes, I added like it. Gate to source.
Do you ken the difference between "Gate and Source" and "'output pin' and the Gate" ?
That's the answer to a different question.
From the schematic you show, the resistor should not be gate to GND/source, right? 
Is that what you mean? wait, I'm soldering them now to test.
I tried it and measure again and I see only 0.4 the voltage drop. Thank you for the best solution. 
I learn a lot here.
Now I know that the source is ACTUALLY a positive power flow.
Nasty soldering and you're right. I built many projects of Quadcopter (for 3 years - rough life) and now I'm going to try using ESP32 lol. Don't you realize that God sends you here to solve my problem. YOu're the best. Thanks again.
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