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VESC 6 Schematic Question

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mendez
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VESC 6 Schematic Question

Hey Guys;

What is U11 in the schematic? and which model for the MOFSET (IRF7749) would you guys recommend?

Thanks for the help!

district9prawn
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Hall sensor.

mendez
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P4 is for the Hall Sensor. But U11? The 1, 2, 3 seems to be a switch right (used on the hallsensor)?

sam.vanratt
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Hi mendez

the U11 is a switch symbol, meant to allow switching of the supply voltage for the HALLs, PullUp resistors and temp sensor. Nowadays all HALLs I know of work with 5V (min Vcc=3.6-4V), but maybe with Die-Shrinking the Voltage will go down to 3.3V in the future. The used uC is 3,3V and accept only voltages up to 3,3V, so running every input with max. 3,3V is very tempting.

Cheers

Sam

Pedelec usage in combination with a GoldenMotor MagicPie3 BLDC

copetresillian
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I think it's  hall sensor.

Pimousse
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The switch allows the use of encoder working with 3.3V.

dreydean
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Why is the MPU9150 SCL and SDA lines tied to the bluetooth RX and TX lines? The mpu9150 requires pull up resistors to 3.3v so this doesnt seem like a good idea? 

Drey Platt

dreydean
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Anyone know if this is a design error. It appears you either can have an accelerometer with pull up lines or a bluetooth module, not both. 

Drey Platt

frank
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Which HW are you talking about? The VESC 6 plus?