Hall Sensors -> SS411A?

Discuss hardware related to the VESC such as the NRF nunchuk.
Nordle
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Hall Sensors -> SS411A?

Postby Nordle » 25 Mar 2016, 21:13

Hi,
I want add hall sensors to a brushless RC outrunner, do you think these are viable?

Source is aliexpress but will check them before use;)

Nordle
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Re: Hall Sensors -> SS411A?

Postby Nordle » 01 Apr 2016, 09:56

Or can you recommend hall sensor type for VESC?

rew
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Re: Hall Sensors -> SS411A?

Postby rew » 02 Apr 2016, 12:03

I remember something about hall sensors often having open drain outputs, and that VESC does not have the pullups.

I don't remember clearly, so it could also be the other way around: I wanted to use the pins for something but the pullups were in the way.

meier
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Re: Hall Sensors -> SS411A?

Postby meier » 06 Apr 2016, 11:41

Hi,

I used the SS411A hall sensors in my motor and they worked great with VESC.

Nordle
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Re: Hall Sensors -> SS411A?

Postby Nordle » 06 Apr 2016, 19:00

Nice that sounds good:) I already ordered them^^

Nordle
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Re: Hall Sensors -> SS411A?

Postby Nordle » 30 Apr 2016, 11:19

Hey, me again:)

How do I have to connect the Vcc and ground of the three halls? Series or parallel?

rew
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Re: Hall Sensors -> SS411A?

Postby rew » 01 May 2016, 10:45

Each Hall has a ground pin. Connect it to the ground on the VESC. Each Hall has a VCC connection. Connect it to the VCC on the VESC hall connector. That results in a parallel connection, I guess.

Nordle
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Re: Hall Sensors -> SS411A?

Postby Nordle » 01 May 2016, 14:08


rew
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Re: Hall Sensors -> SS411A?

Postby rew » 02 May 2016, 13:35

Just checked: The SS411A has an open drain or open collector output. See "block diagram" in Figure 1 in the datasheet.

When I based my design on VESC, the hall sensor lines did not have a pullup, just a series resistor. I just came acrross my note in my schematic: "TODO: don't hall sensors require a pullup? "

So... I don't know if (your?) VESC has a pullup on the hall lines. If not, you may need to put a pullup on each line... (I would think that the internal pullup in the CPU is too weak. But on the other hand, maybe it works...)

Nordle
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Re: Hall Sensors -> SS411A?

Postby Nordle » 02 May 2016, 18:16

sry, wooot? :shock:


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