You don't need a pull down for that hall effect sensor, you need a pull up. The output is the collector of an NPN transistor, so open collector.

There is a datasheet:

Brown is supply to sensor.?

Black is Open Collector output (if you don't put a pullup, it will only float up)

Blue is sensor ground

page 3 shows the schematic you would use, including a level shifter made of resistors to keep the output voltage in the range the processor needs. You can adjust the resistors to make the range be 0..3.1v if that is what you need.

On Tue, May 6, 2025 at 11:37?PM mike allen via <animal=[email protected]> wrote:

we were gettin a ton of bounce with the sensor I originally picked . but I totally missed the part where i needed to use a pull down resistor . so maybe it? get's better with the resistor .

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thanks

animal

On 5/6/25 11:09 PM, John Dammeyer wrote:

Here's a photo of my South Bend Heavy 10L with a magnet in the bearing clamp hole and a hall sensor to pick up the magnet.? Been working without issues for probably since about 2008.

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This is on a different lathe.? Again easy to do.

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> -----Original Message-----

> From: [email protected] [mailto:[email protected]] On Behalf

> Of mike allen

> Sent: May 6, 2025 6:39 PM

> To: [email protected]

> Subject: [digitalhobbyist] ELS on a SOuth Bend 9

>

> hey folk's has anyone? done this ELS on a South Bend 9 lathe ?

>

> I'm lookin to see some pics of encoder mounting if anyone has any

>

> thanks

>

> animal

>

>

>

>

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--
Buffalo John